South Bend SB1057F User guide

TURN-NADO® GEARHEAD

LATHE w/DRO

MODEL SB1046PF 21" X 60" MODEL SB1056F 18" X 40"
MODEL SB1047F 21" X 80" MODEL SB1057F 18" X 60"
MODEL SB1048PF 21" X 120" MODEL SB1058F 18" X 80"

OWNER'S MANUAL

© August, 2011 by South Bend Lathe Co. Revised March, 2014 (ST). For Machines Mfg. Since 2/14

Customer Service

We stand behind our machines. If you have any service questions, parts requests or general questions
about your purchase, feel free to contact us.

South Bend Lathe Co.
P.O. Box 2027
Bellingham, WA 98227
Phone: [phone]
Fax: [phone] (International)
Fax: [phone] (USA Only)
Email: [e-mail]

Updates

For your convenience, any updates to this manual will be available to download free of charge

through our website at:

www.southbendlathe.com

Scope of Manual

This manual helps the reader understand the machine, how to prepare it for operation, how to control
it during operation, and how to keep it in good working condition. We assume the reader has a basic
understanding of how to operate this type of machine, but that the reader is not familiar with the
controls and adjustments of this specific model. As with all machinery of this nature, learning the
nuances of operation is a process that happens through training and experience. If you are not an
experienced operator of this type of machinery, read through this entire manual, then learn more
from an experienced operator, schooling, or research before attempting operations. Following this
advice will help you avoid serious personal injury and get the best results from your work.

Manual Feedback

We've made every effort to be accurate when documenting this machine. However, errors sometimes
happen or the machine design changes after the documentation process—so

the manual may not

exactly match your machine.

If a difference between the manual and machine leaves you in doubt,

contact our

customer service for clarification.

We highly value customer feedback on our manuals. If you have a moment, please share your
experience using this manual. What did you like about it? Is there anything you would change to
make it better? Did it meet your expectations for clarity, professionalism, and ease-of-use?

South Bend Lathe, Inc.

C

/O Technical Documentation Manager

P.O. Box 2027
Bellingham, WA 98227
Email: [e-mail]

Table of Contents

INTRODUCTION .................................................... 3

About This Machine .............................................3

Foreword ............................................................. 3

Capabilities ......................................................... 3

Features .............................................................. 3

General Identification ..........................................4

Controls & Components.......................................5

Master Power Switch ........................................... 5

Headstock ...........................................................5

Control Panel ......................................................6

Carriage .............................................................. 6

Carriage Feed Clutch Knob .................................. 7

Tailstock .............................................................7

Safety Foot Brake ................................................ 8

SB1046PF, SB1047F, SB1048PF ..........................9

Product Specifications .......................................13

SB1056F, SB1057F, SB1058F ............................ 13

SAFETY ................................................................17

Understanding Risks of Machinery .................. 17

Basic Machine Safety ........................................17

Additional Metal Lathe Safety ..........................19

Additional Chuck Safety....................................20

PREPARATION .................................................... 21

Preparation Overview ........................................21

Things You'll Need .............................................21

Power Supply Requirements ............................. 22

Availability ........................................................22

Full-Load Current Rating ..................................22

Circuit Requirements .........................................22

Grounding Requirements ................................... 23

Unpacking ..........................................................24

Inventory ............................................................ 24

Cleaning & Protecting .......................................25

Physical Environment ........................................26

Electrical Installation ........................................ 26

Lighting ............................................................26

Weight Load ...................................................... 26

Space Allocation ................................................26

Lifting & Moving ................................................27

Leveling & Mounting ......................................... 28

Leveling ............................................................28

Bolting to Concrete Floors ..................................29

Assembly ............................................................29

Lubricating Lathe .............................................. 30

Adding Coolant ..................................................30

Power Connection ..............................................30

Test Run ............................................................. 32

Spindle Break-In ................................................35

Recommended Adjustments .............................. 35

OPERATION ........................................................36

Operation Overview ........................................... 36

Chuck & Faceplate Mounting ...........................37

Installation & Removal Devices ........................ 37

Chuck Installation ............................................. 38

Registration Marks ............................................ 39

Chuck Removal ..................................................39

Scroll Chuck Clamping ...................................... 40

4-Jaw Chuck .......................................................40

Mounting Workpiece .......................................... 40

Faceplate ............................................................41

Tailstock ............................................................. 42

Positioning Tailstock .........................................42

Using Quill ........................................................ 42

Installing Tooling ..............................................43

Removing Tooling .............................................. 44

Offsetting Tailstock ...........................................44

Aligning Tailstock to Spindle Centerline ............45

Centers ...............................................................46

Dead Centers .....................................................46

Live Centers ...................................................... 47

Mounting Dead Center in Spindle ...................... 47

Removing Center from Spindle ...........................47

Mounting Center in Tailstock .............................47

Removing Center from Tailstock ........................48

Mounting Workpiece Between Centers ............... 48

Steady Rest ........................................................49

Follow Rest ......................................................... 50

Carriage & Compound Rest Locks .................... 50

Compound Rest .................................................. 50

Four-Way Tool Post ...........................................51

Installing Tool ................................................... 51

Aligning Cutting Tool with Spindle Centerline ...51

Micrometer Stop.................................................52

Manual Feed ......................................................53

Carriage Handwheel .......................................... 53

Cross Slide Handwheel ...................................... 53

Compound Rest Handwheel ............................... 53

Spindle Speed .....................................................53

Determining Spindle Speed ................................53

Setting Spindle Speed ........................................ 54

Power Feed ......................................................... 54

Power Feed Controls .......................................... 55

Setting Power Feed Rate ....................................57

End Gears ...........................................................58

Standard End Gear Configuration ...................... 58

Alternate End Gear Configuration .....................58

Threading Controls ............................................ 59

Headstock & Gearbox Threading Controls .......... 59

Apron Controls ..................................................60

Thread Dial ....................................................... 61

Thread Dial Chart .............................................61

Chip Drawer ....................................................... 63

Coolant System ..................................................63

Rod Support........................................................64

ACCESSORIES ...................................................65

MAINTENANCE ................................................... 66

Maintenance Schedule .......................................66

Cleaning & Protecting .......................................66

Maintenance Chart ............................................ 67

Lubrication ......................................................... 68

Headstock .........................................................68

Quick-Change Gearbox ...................................... 69

Apron ................................................................ 70

One-Shot Oiler ..................................................71

Longitudinal Leadscrew .....................................72

Ball Oilers ......................................................... 72

End Gears .........................................................73

Coolant System Service ..................................... 74

Hazards.............................................................74

Adding Fluid .....................................................75

Changing Coolant .............................................. 75

Machine Storage ................................................76

SERVICE .............................................................. 77

Backlash Adjustment ........................................77

Compound Rest .................................................77

Cross Slide ........................................................77

Leadscrew End Play Adjustment ...................... 78

Gib Adjustment .................................................. 78

Half Nut Adjustment ......................................... 80

V-Belts ................................................................ 80

Spindle Clutch Adjustment ............................... 81

Leadscrew Shear Pin Replacement ..................84

Gap Insert Removal & Installation ..................86

Gap Removal ..................................................... 86

Gap Installation ................................................87

ELECTRICAL ........................................................91

Electrical Safety Instructions ...........................91

Correcting Phase Polarity .................................92

Wiring Overview ................................................ 93

Component Location Index................................94

Electrical Cabinet Wiring .................................. 95

Spindle Motor .....................................................97

Coolant Pump .....................................................97

Control Panel .....................................................98

Additional Components ..................................... 99

Power Supply Connection ..................................99

PARTS ................................................................100

Headstock Housing .......................................... 100

Headstock Gears .............................................. 103

Gearbox ............................................................107

End Gears .........................................................115

Motor & Headstock Oil System .......................116

Saddle & Cross Slide .......................................118

Tool Post & Compound Rest ............................121

Bed & Shafts ....................................................122

Stands & Panels

(SB1046PF-47PF, SB1056F-58F) ...................124

Stand & Panels (SB1048PF) ...........................126

Brake ................................................................128

Tailstock ........................................................... 129

Thread Dial ......................................................130

Micrometer Stop...............................................130

Steady Rest ......................................................131

Follow Rest ....................................................... 131

Electrical Cabinet & Control Panel ................132

Accessories .......................................................133

Front Machine Labels ......................................134

Rear Machine Labels ....................................... 135

WARRANTY ....................................................... 137

TROUBLESHOOTING .........................................88

16" South Bend Precision Toolroom Lathe

(Circa 1958)

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

About This Machine

Foreword

"The screw cutting engine lathe is the oldest and
most important of machine tools and from it all
other machine tools have been developed. It was
the lathe that made possible the building of the
steamboat, the locomotive, the electric motor, the
automobile and all kinds of machinery used in
industry. Without the lathe our great industrial
progress of the last century would have been
impossible." —How To Run a Lathe, 15th

Edition, South Bend Lathe.

The lathe represented in this manual is a
modern day version of the screw cutting lathes
that trace their roots back to the 1700's, which
were themselves technological improvements of
the bow lathe that can be traced back thousands
of years to the ancient Egyptians.

Now, almost 300 years later, these modern
"screw cutting" lathes are not just a piece of
refined machinery, but a culmination of human
ingenuity and knowledge embodied into the
design and synergy of thousands of interworking
parts—some of which represent the life's work
and dreams of many inventors, mechanical
engineers, and world-class machinists—including
the likes of Leonardo da Vinci, Henry Maudsley,
and the founders of South Bend Lathe, John and
Miles O'Brien.

And now the torch is passed to you—to take
the oldest and most important type of machine
tool—and carry on the tradition. As the operator
of a South Bend Lathe, you now join the ranks
of some very famous and important customers,
such as Henry Ford, who used the machines he
purchased to help him change the world.

Features

These 16-Speed Gearhead Lathes are packed
with standard features and equipment, such
as a complete coolant system, easy-to-clean
chip drawer, one-shot way lubrication system,
included steady and follow rests, chuck guard,
adjustable work lamp, foot brake, powered
cross feed, 3- and 4-jaw chucks, faceplate, and
premium Allen-Bradley contactors, thermal
relays, and fuse system.

Spindle speeds are controlled by convenient
headstock levers, which allow the operator to
quickly set the spindle speed within the available
range of 20–1600 RPM.

The beds of these lathes are constructed with
Meehanite castings that are hardened and
precision-ground in the traditional three V-way
prismatic design—long used on South Bend
Lathes for its accuracy, durability, and rigidity.

The headstocks feature quick-change gear levers
and the carriages include an adjustable clutch
that disables automatic carriage feed when it
contacts the included feed stop or in the event of
a crash.

These lathes
the operator to switch between forward and reverse
without shutting down the motor—a great time saver

To further ensure a high degree of accuracy,
these lathes are equipped with high-quality
German spindle bearings and a Fagor 2-Axis
DRO. The spindles are D1-8 camlock with an
MT#7 taper and 3.15" bore. The tailstocks have
an MT#5 taper and 6.5" of quill travel.

feature a spindle clutch that allows

.

Capabilities

These Turn-Nado® Gearhead Lathes are built
for daily use in a busy industrial setting.
Loaded with many nice features and high­precision parts, these lathes excel at making fine
tools, dies, thread gauges, jigs, and precision
test gauges—however, they are by no means
delicate. Thick castings, heavy weight, and
quality construction throughout provide the
necessary brawn for demanding production and
manufacturing tasks.

-3-

Turn-Nado® Gearhead Lathes

INTRODUCTION

General Identification

For Machines Mfg. Since 2/14

D

C

E

B

A

ST

R

Q

G

I

F

H

P

O

J

K

L

M

N

Figure 1. General identification (Model SB1058F shown).

A. Quick-Change Gearbox Controls
B. Headstock Controls
C. D1-8 Camlock MT#7 Spindle
D. Chuck Guard w/Safety Switch
E. Follow Rest
F. 4-Way Tool Post
G. Halogen Work Lamp
H. Steady Rest
I. Coolant Nozzle & Valve
J. Fagor DRO Control Panel

Serious personal injury could occur if
you connect the machine to power before
completing the setup process. DO NOT
connect power until instructed to do so later
in this manual.

K. Tailstock w/MT#5 Quill
L. Rod Support (SB1047F, -48PF, -58F only)
M. Leadscrew
N. Feed Rod
O. Spindle Rod
P. Chip Drawer
Q . Safety Foot Brake
R. Carriage
S. Micrometer Stop
T. Headstock Spindle Lever

Untrained users have an increased risk
of seriously injuring themselves with this
machine. Do not operate this machine until
you have understood this entire manual and
received proper training.

-4-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

Controls &
Components

Refer to Figures 2–9 and the following
descriptions to become familiar with the features
and basic controls of this lathe. This knowledge
will be necessary to properly set up the lathe for
the test run and spindle break-in.

To reduce the risk of
serious injury when using
this machine, read and
understand this entire
manual before beginning any
lathe operations.

Master Power Switch

The rotary switch shown in Figure 2 toggles
incoming power ON and OFF to the lathe
controls. It also prevents the electrical cabinet
door from being opened when the switch is ON.

Headstock

E

D

C

B

A

Figure 3. Headstock controls.

A. Quick Change Gearbox Levers: Controls the

leadscrew and feed rod speed for threading
and feed operations.

B. Headstock Feed Direction Lever: Controls

the direction that the leadscrew and feed rod
rotate.

F

Master Power

Switch

Figure 2. Location of the master power switch.

Turning the master power switch to OFF is not
a safe alternative to completely disconnecting
the machine from power when wiring,
servicing, or making repairs.

C. Gearbox Range Lever: Shifts the quick-

change gearbox into low range, neutral, or
high range.

D. Spindle Speed Lever: Selects one of the four

spindle speeds within the available range.

E. Spindle Speed Range Lever: Selects one of

four spindle speed ranges.

F. Threading and Feed Charts: Displays the

necessary configurations of the gearbox
levers and end gears for different threading
or feeding options.

-5-

Turn-Nado® Gearhead Lathes

INTRODUCTION

For Machines Mfg. Since 2/14

Control Panel

H I J

G

Figure 4. Control panel.

G. Power Light: Illuminates when lathe controls

are receiving power.

H. Coolant Pump OFF & ON Buttons: Control

the coolant pump motor.

I. Spindle Motor OFF & ON Buttons: Controls

the spindle motor.

J. STOP Button: Stops all machine functions.

Twist clockwise to reset.

Carriage

N

O

M

L

K

P

R

Q

S

T

U

K. Carriage Handwheel: Moves the carriage

along the bed. Can be disengaged during
power feed operations to prevent an
entanglement hazard.

L. Cross Slide Handwheel: Moves the cross

slide toward and away from the workpiece.

M. Compound Rest Handwheel: Moves the tool

toward and away from the workpiece at the
preset angle of the compound rest.

N. 4-Way Tool Post: Mounts up to four cutting

tools at once that can be individually indexed
to the workpiece.

O. Coolant Flow Control Lever: Controls the

flow of coolant from the nozzle.

P. One-Shot Oiler: Draws oil from the apron

reservoir to lubricate the carriage ways
through various oil ports.

Q . Half Nut Lever: Engages/disengages the half

nut for threading operations.

R. Carriage Lock: Secures the carriage in place

when the carriage should not move.

S. Thread Dial and Chart: Dial indicates when

to engage the half nut during threading
operations. Chart indicates on which thread
dial reading to engage the half nut for
specific inch thread pitches.

T. Spindle Lever: Starts, stops and reverses

direction of spindle rotation.

U. Feed ON/OFF Lever: Engages/disengages

power feed.

V. Apron Feed Direction Knob: Changes

direction of carriage or the cross slide feed
without having to stop the lathe and move
the headstock feed direction lever.

-6-

W

Figure 5. Carriage controls.

V

W. Feed Selection Knob: Selects the carriage or

cross slide for power feed.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

Carriage Feed Clutch Knob

X

Figure 6. Adjustable carriage feed clutch knob.

X. Carriage Feed Clutch Knob: Adjusts how

easily the carriage clutch will disengage
automatic feeding when the carriage
contacts a feed stop or in the event of a
crash. Tightening this knob all the way
disables the carriage clutch completely.

AB. Tailstock Handwheel: Moves the quill toward

or away from the spindle. The graduated
dial has 0.001" increments with one full
revolution equaling 0.200" of quill travel.

AC. Tailstock Gib Screws: Adjust the tapered gib

to control tailstock offset accuracy.

AD. Tailstock Offset Screws: Adjust the

tailstock offset left or right from the spindle
centerline.

AE

AF

AH

AG

Tailstock

Z

Y

Figure 7. Tailstock controls.

Y. Quill: The quill has an MT#5 taper, metric

and inch scale, and a drift slot to remove
tight-fitting tooling.

Z. Quill Lock Lever: Secures the quill in

position.

AD

AA

AB

AC

Figure 8. Tailstock controls.

AE. Tailstock Clamp Bolt: Adjusts the clamping

pressure applied by the tailstock lock lever.

AF. Offset Scale: Indicates the relative distance

of tailstock offset from the spindle centerline.

AG Offset Lock Bolt: Clamps together the upper

and lower halves of the tailstock after the
offset is adjusted.

AH. Tailstock Stop Pin: Prevents the tailstock

from sliding off of the ways.

AA. Tailstock Lock Lever: Secures the tailstock in

position along the bedway.

-7-

Turn-Nado® Gearhead Lathes

INTRODUCTION

For Machines Mfg. Since 2/14

Safety Foot Brake

This lathe is equipped with a foot brake (see
Figure 9) to quickly stop the spindle instead of
allowing it to coast to a stop on its own.

Pressing the foot brake disengages the spindle
clutch from the motor drive train inside the
headstock.

After the foot brake is used, the spindle lever is
used to re-start spindle rotation.

Spindle Levers

Foot Brake

Figure 9. Foot brake and spindle levers.

-8-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

Product Specifications

P.O. Box 2027, Bellingham, WA 98227 U.S.A.

PHONE: [phone] • © South Bend Lathe Co.

www.southbendlathe.com

MODEL SB1046PF, SB1047F, SB1048PF

®

21" TURN-NADO

Model Number SB1046PF SB1047F SB1048PF

Product Dimensions

Weight 5830 lbs. 6640 lbs. 8140 lbs.

Width (side-to-side)/Depth
(front-to-back)/Height

Foot Print (Width/Depth) 122

Shipping Dimensions

Type Wood Slat Crate

Weight 6182 lbs. 7440 lbs. 8712 lbs.

Width (side-to-side)/Depth
(front-to-back)/Height

Electrical

Power Requirement 440V, 3-Phase, 60Hz

Full-Load Current Rating 19.23A

Minimum Circuit Size 30A

Switch Magnetic with Thermal Protection

Switch Voltage 440V

Plug Included No

Recommended Connection Type Hardwire to Locking Disconnect Switch

110

121" x 45" x 69" 141" x 45" x 74" 183" x 45" x 69"

GEARHEAD LATHE w/DRO

1

⁄2" x 27" x 54 3⁄4" 130 1⁄4" x 27" x 54 3⁄4" 169 3⁄4" x 27" x 54 3⁄4"

1

⁄4" x 71 3⁄4" 141 3⁄4" x 71 3⁄4" 182" x 71 3⁄4"

-9-

Turn-Nado® Gearhead Lathes

INTRODUCTION

For Machines Mfg. Since 2/14

Model Number SB1046PF SB1047F SB1048PF

Main Motor

Type TEFC Induction

Horsepower 15 HP

Voltage 440V

Phase 3-Phase

Amps 19A

Speed 1720 RPM

Cycle 60 Hz

Power Transfer V-Belt & Gear

Bearings Shielded & Permanently Sealed

Coolant Motor

Type TEFC Induction

1

Horsepower

Voltage 440V

Phase 3-Phase

Amps 0.23A

Speed 3450 RPM

Cycle 60 Hz

Power Transfer Direct Drive

Bearings Shielded & Permanently Sealed

Operation Information

Swing Over Bed 21 in.

Distance Between Centers 60 in. 80 in. 120 in.

Swing Over Cross Slide 14.01 in.

Swing Over Saddle 21 in.

Swing Over Gap 31.10 in.

Maximum Tool Bit Size 1 in.

Compound Travel 5.39 in.

Carriage Travel 59 in. 79 in. 119 in.

Cross Slide Travel 11 in.

⁄8 HP

-10-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

Model Number SB1046PF SB1047F SB1048PF

Headstock Information

Spindle Bore 3.15 in.

Spindle Taper MT#7

Number of Spindle Speeds 16

Range of Spindle Speeds 20–1600 RPM

Spindle Type D1-8 Camlock

Spindle Bearings Tapered Roller

Tailstock Information

Tailstock Quill Travel 6.5 in.

Tailstock Taper MT#5

Tailstock Barrel Diameter 3 in.

Threading Information

Number of Longitudinal Feeds 15

Range of Longitudinal Feeds 0.0015–0.0400 in./rev.

Number of Cross Feeds 15

Range of Cross Feeds 0.00075–0.0200 in./rev

Number of Inch Threads 38

Range of Inch Threads 2–72 TPI

Number of Metric Threads 40

Range of Metric Threads 0.4–14 mm

Number of Modular Pitches 18

Range of Modular Pitches 0.3–3.5 MP

Number of Diametral Pitches 21

Range of Diametral Pitches 8–44 DP

Dimensions

Bed Width 13.58 in.

3

Leadscrew Diameter 1

Leadscrew TPI 4 TPI

Leadscrew Length 85.39 in. 105 in. 145.43 in.

Steady Rest Capacity

Follow Rest Capacity

Faceplate Size 14 in.

⁄8 in.

5

⁄8–7 1⁄16 in.

5

⁄8–5 1⁄8 in.

Floor to Center Height 46.65 in.

Height With Leveling Jacks 47.9 in.

-11-

Turn-Nado® Gearhead Lathes

INTRODUCTION

For Machines Mfg. Since 2/14

Model Number SB1046PF SB1047F SB1048PF

Construction

Headstock Cast Iron

Headstock Gears Flame-Hardened Steel

Bed Meehanite Castings with Induction-Hardened Ways

Stand Cast Iron

Paint Urethane

Other

Country of Origin Taiwan (Some Components Made in USA & Germany)

Warranty 1 Year

Serial Number Location ID Label on Front of Headstock

Assembly Time Approximately 1 Hour

Sound Rating at Idle 76 dB

-12-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

Product Specifications

P.O. Box 2027, Bellingham, WA 98227 U.S.A.

PHONE: [phone] • © South Bend Lathe Co.

www.southbendlathe.com

MODEL SB1056F, SB1057F, SB1058F

®

18" TURN-NADO

Model Number SB1056F SB1057F SB1058F

Product Dimensions

Weight 4400 lbs. 5170 lbs. 5940 lbs.

Width (side-to-side)/Depth
(front-to-back)/Height

Foot Print (Width/Depth) 102

Shipping Dimensions

Type Wood Slat Crate

Weight 4708 lbs. 5522 lbs. 6380 lbs.

Width (side-to-side)/Depth
(front-to-back)/Height

Electrical

Power Requirement 440V, 3-Phase, 60Hz

Full-Load Current Rating 19.23A

Minimum Circuit Size 30A

Switch Magnetic with Thermal Protection

Switch Voltage 440V

Plug Included No

Recommended Connection Type Hardwire to Locking Disconnect Switch

90

100" x 45" x 69" 121" x 45" x 69" 141" x 45" x 69"

GEARHEAD LATHE w/DRO

3

⁄4" x 27" x 54 3⁄4" 110 1⁄2" x 27" x 54 3⁄4" 130 1⁄4" x 27" x 54 3⁄4"

1

⁄2" x 71 3⁄4" 122 1⁄4" x 71 3⁄4" 141 3⁄4" x 71 3⁄4"

-13 -

Turn-Nado® Gearhead Lathes

INTRODUCTION

For Machines Mfg. Since 2/14

Model Number SB1056F SB1057F SB1058F

Main Motor

Type TEFC Induction

Horsepower 15 HP

Voltage 440V

Phase 3-Phase

Amps 19A

Speed 1720 RPM

Cycle 60 Hz

Power Transfer V-Belt & Gear

Bearings Shielded & Permanently Sealed

Coolant Motor

Type TEFC Induction

1

Horsepower

Voltage 440V

Phase 3-Phase

Amps 0.23A

Speed 3450 RPM

Cycle 60 Hz

Power Transfer Direct Drive

Bearings Shielded & Permanently Sealed

Operation Information

Swing Over Bed 18.11 in.

Distance Between Centers 40 in. 60 in. 80 in.

Swing Over Cross Slide 11.02 in

Swing Over Saddle 18 in.

Swing Over Gap 27.95 in.

Maximum Tool Bit Size 1 in.

Compound Travel 5.39 in.

Carriage Travel 39 in. 59 in. 79 in.

Cross Slide Travel 11 in.

⁄8 HP

-14-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

INTRODUCTION

Model Number SB1056F SB1057F SB1058F

Headstock Information

Spindle Bore 3.15 in.

Spindle Taper MT#7

Number of Spindle Speeds 16

Range of Spindle Speeds 20–1600 RPM

Spindle Type D1-8 Camlock

Spindle Bearings Tapered Roller

Tailstock Information

Tailstock Quill Travel 6.5 in.

Tailstock Taper MT#5

Tailstock Barrel Diameter 3 in.

Threading Information

Number of Longitudinal Feeds 15

Range of Longitudinal Feeds 0.0015–0.0400 in./rev.

Number of Cross Feeds 15

Range of Cross Feeds 0.00075–0.0200 in./rev

Number of Inch Threads 38

Range of Inch Threads 2–72 TPI

Number of Metric Threads 40

Range of Metric Threads 0.4–14 mm

Number of Modular Pitches 18

Range of Modular Pitches 0.3–3.5 MP

Number of Diametral Pitches 21

Range of Diametral Pitches 8–44 DP

Dimensions

Bed Width 13.58 in.

3

Leadscrew Diameter 1

Leadscrew TPI 4 TPI

Leadscrew Length 65.71 in. 85.39 in. 105.08 in.

Steady Rest Capacity

Follow Rest Capacity

Faceplate Size 14 in.

Feed Rod Diameter 0.93 in

Floor to Center Height 45.08 in.

Height With Leveling Jacks 46.25 in

⁄8 in.

5

⁄8–7 1⁄16 in.

5

⁄8–5 1⁄8 in.

-15 -

Turn-Nado® Gearhead Lathes

INTRODUCTION

For Machines Mfg. Since 2/14

Model Number SB1056F SB1057F SB1058F

Construction

Headstock Cast Iron

Headstock Gears Flame-Hardened Steel

Bed Meehanite Castings with Induction-Hardened Ways

Stand Cast Iron

Paint Urethane

Other

Country of Origin Taiwan (Some Components Made in USA & Germany)

Warranty 1 Year

Serial Number Location ID Label on Front of Headstock

Assembly Time Approximately 1 Hour

Sound Rating at Idle 76 dB

-16 -

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

Operating all machinery and machining equipment can be dangerous or relatively safe depending
on how it is installed and maintained, and the operator's experience, common sense, risk awareness,
working conditions, and use of personal protective equipment (safety glasses, respirators, etc.).

The owner of this machinery or equipment is ultimately responsible for its safe use. This
responsibility includes proper installation in a safe environment, personnel training and usage
authorization, regular inspection and maintenance, manual availability and comprehension,
application of safety devices, integrity of cutting tools or accessories, and the usage of approved
personal protective equipment by all operators and bystanders.

The manufacturer of this machinery or equipment will not be held liable for injury or property
damage from negligence, improper training, machine modifications, or misuse. Failure to read,
understand, and follow the manual and safety labels may result in serious personal injury, including
amputation, broken bones, electrocution, or death.

The signals used in this manual to identify hazard levels are as follows:

Owner’s Manual: All machinery and machining

Trained/Supervised Operators Only: Untrained

SAFETY

Understanding Risks of Machinery

Death or catastrophic
harm WILL occur.

Death or catastrophic
harm COULD occur.

Moderate injury or fire
MAY occur.

Machine or property
damage may occur.

Basic Machine Safety

equipment presents serious injury hazards
to untrained users. To reduce the risk of
injury, anyone who uses THIS item MUST
read and understand this entire manual
before starting.

Personal Protective Equipment:

servicing this item may expose the user
to flying debris, dust, smoke, dangerous
chemicals, or loud noises. These hazards
can result in eye injury, blindness, long­term respiratory damage, poisoning,
cancer, reproductive harm or hearing loss.
Reduce your risks from these hazards
by wearing approved eye protection,
respirator, gloves, or hearing protection.

Operating or

users can seriously injure themselves
or bystanders. Only allow trained and
properly supervised personnel to operate
this item. Make sure safe operation
instructions are clearly understood. If
electrically powered, use padlocks and
master switches, and remove start switch
keys to prevent unauthorized use or
accidental starting.

Guards/Covers:

moving parts during operation may cause
severe entanglement, impact, cutting,
or crushing injuries. Reduce this risk by
keeping any included guards/covers/doors
installed, fully functional, and positioned
for maximum protection.

Accidental contact with

-17-

Turn-Nado® Gearhead Lathes

Entanglement: Loose clothing, gloves, neckties,

rotate.

Chuck Keys or Adjusting Tools:

Tools used to

our Technical Support for assistance.

SAFETY

For Machines Mfg. Since 2/14

jewelry or long hair may get caught in
moving parts, causing entanglement,
amputation, crushing, or strangulation.
Reduce this risk by removing/securing
these items so they cannot contact moving
parts.

Mental Alertness: Operating this item with

reduced mental alertness increases the
risk of accidental injury. Do not let a
temporary influence or distraction lead to a
permanent disability! Never operate when
under the influence of drugs/alcohol, when
tired, or otherwise distracted.

Safe Environment:

powered equipment in a wet environment
may result in electrocution; operating near
highly flammable materials may result in a
fire or explosion. Only operate this item in
a dry location that is free from flammable
materials.

Electrical Connection: With electically powered

equipment, improper connections to the
power source may result in electrocution
or fire. Always adhere to all electrical
requirements and applicable codes when
connecting to the power source. Have all
work inspected by a qualified electrician to
minimize risk.

Disconnect Power: Adjusting or servicing

electrically powered equipment while it
is connected to the power source greatly
increases the risk of injury from accidental
startup. Always disconnect power
BEFORE any service or adjustments,
including changing blades or other tooling.

Operating electrically

adjust spindles, chucks, or any moving/
rotating parts will become dangerous
projectiles if left in place when the machine
is started. Reduce this risk by developing
the habit of always removing these tools
immediately after using them.

Work Area:

the risks of accidental injury. Only operate
this item in a clean, non-glaring, and well­lighted work area.

Properly Functioning Equipment:

maintained, damaged, or malfunctioning
equipment has higher risks of causing
serious personal injury compared to
those that are properly maintained.
To reduce this risk, always maintain
this item to the highest standards and
promptly repair/service a damaged or
malfunctioning component. Always follow
the maintenance instructions included in
this documentation.

Unattended Operation:

equipment that is left unattended while
running cannot be controlled and is
dangerous to bystanders. Always turn the
power OFF before walking away.

Health Hazards: Certain cutting fluids and

lubricants, or dust/smoke created when
cutting, may contain chemicals known to
the State of California to cause cancer,
respiratory problems, birth defects,
or other reproductive harm. Minimize
exposure to these chemicals by wearing
approved personal protective equipment
and operating in a well ventilated area.

Clutter and dark shadows increase

Poorly

Electrically powered

Secure Workpiece/Tooling:

cutting tools, or rotating spindles can
become dangerous projectiles if not
secured or if they hit another object during
operation. Reduce the risk of this hazard
by verifying that all fastening devices are
properly secured and items attached to
spindles have enough clearance to safely

-18 -

Loose workpieces,

Difficult Operations:

operations with which you are unfamiliar
increases the risk of injury. If you
experience difficulties performing the
intended operation, STOP! Seek an
alternative method to accomplish the
same task, ask a qualified expert how the
operation should be performed, or contact

Attempting difficult

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SAFETY

Additional Metal Lathe Safety

Speed Rates. Operating the lathe at the wrong

speed can cause nearby parts to break or the
workpiece to come loose, which will result in
dangerous projectiles that could cause severe
impact injuries. Large or non-concentric
workpieces must be turned at slow speeds.
Always use the appropriate feed and speed
rates.

Chuck Key Safety. A chuck key left in the chuck

can become a deadly projectile when the
spindle is started. Always remove the chuck
key after using it. Develop a habit of not
taking your hand off of a chuck key unless it
is away from the machine.

Safe Clearances. Workpieces that crash into

other components on the lathe may throw
dangerous projectiles in all directions,
leading to impact injury and damaged
equipment. Before starting the spindle,
make sure the workpiece has adequate
clearance by hand-rotating it through its
entire range of motion. Also, check the tool
and tool post clearance, chuck clearance, and
saddle clearance.

Long Stock Safety. Long stock can whip violently

if not properly supported, causing serious
impact injury and damage to the lathe.
Reduce this risk by supporting any stock
that extends from the chuck/headstock more
than three times its own diameter. Always
turn long stock at slow speeds.

Securing Workpiece. An improperly secured

workpiece can fly off the lathe spindle with
deadly force, which can result in a severe
impact injury. Make sure the workpiece is
properly secured in the chuck or faceplate
before starting the lathe.

Chucks. Chucks are very heavy and difficult to

grasp, which can lead to crushed fingers or
hands if mishandled. Get assistance when
handling chucks to reduce this risk. Protect
your hands and the precision-ground ways
by using a chuck cradle or piece of plywood
over the ways of the lathe when servicing
chucks. Use lifting devices when necessary.

Clearing Chips. Metal chips can easily cut bare

skin—even through a piece of cloth. Avoid
clearing chips by hand or with a rag. Use a
brush or vacuum to clear metal chips.

Stopping Spindle by Hand. Stopping the spindle

by putting your hand on the workpiece
or chuck creates an extreme risk of
entanglement, impact, crushing, friction, or
cutting hazards. Never attempt to slow or
stop the lathe spindle with your hand. Allow
the spindle to come to a stop on its own or
use the brake.

Crashes. Aggressively driving the cutting tool

or other lathe components into the chuck
may cause an explosion of metal fragments,
which can result in severe impact injuries
and major damage to the lathe. Reduce this
risk by releasing automatic feeds after use,
not leaving lathe unattended, and checking
clearances before starting the lathe.
Make sure no part of the tool, tool holder,
compound rest, cross slide, or carriage will
contact the chuck during operation.

Coolant Safety. Coolant is a very poisonous

biohazard that can cause personal injury
from skin contact alone. Incorrectly
positioned coolant nozzles can splash on
the operator or the floor, resulting in an
exposure or slipping hazard. To decrease
your risk, change coolant regularly and
position the nozzle where it will not splash
or end up on the floor.

Tool Selection. Cutting with an incorrect or

dull tool increases the risk of accidental
injury due to the extra force required for
the operation, which increases the risk of
breaking or dislodging components that
can cause small shards of metal to become
dangerous projectiles. Always select the
right cutter for the job and make sure it is
sharp. A correct, sharp tool decreases strain
and provides a better finish.

-19 -

Turn-Nado® Gearhead Lathes

SAFETY

Additional Chuck Safety

For Machines Mfg. Since 2/14

Entanglement. Entanglement with a rotating

chuck can lead to death, amputation, broken
bones, or other serious injury. Never attempt
to slow or stop the lathe chuck by hand,
and always roll up long sleeves, tie back
long hair, and remove any jewelry or loose
apparel BEFORE operating.

Chuck Speed Rating. Excessive spindle speeds

greatly increase the risk of the workpiece or
chuck being thrown from the machine with
deadly force. Never use spindle speeds faster
than the chuck RPM rating or the safe limits
of your workpiece.

Using Correct Equipment. Many workpieces can

only be safely turned in a lathe if additional
support equipment, such as a tailstock or
steady rest, is used. If the operation is too
hazardous to be completed with the lathe or
existing equipment, the operator must have
enough experience to know when to use a
different machine or find a safer way.

Trained Operators Only. Using a chuck

incorrectly can result in workpieces coming
loose at high speeds and striking the
operator or bystanders with deadly force.
To reduce the risk of this hazard, read
and understand this document and seek
additional training from an experienced
chuck user before using a chuck.

Chuck Capacity. Avoid exceeding the capacity

of the chuck by clamping an oversized
workpiece. If the workpiece is too large to
safely clamp with the chuck, use a faceplate
or a larger chuck if possible. Otherwise, the
workpiece could be thrown from the lathe
during operation, resulting in serious impact
injury or death.

Clamping Force. Inadequate clamping force

can lead to the workpiece being thrown
from the chuck and striking the operator
or bystanders. Maximum clamping force
is achieved when the chuck is properly
maintained and lubricated, all jaws are
fully engaged with the workpiece, and the
maximum chuck clamping diameter is not
exceeded.

Proper Maintenance.

maintained and lubricated to achieve
maximum clamping force and withstand
the rigors of centrifugal force. To reduce
the risk of a thrown workpiece, follow all
maintenance intervals and instructions in
this document.

Disconnect Power. Serious entanglement or

impact injuries could occur if the lathe is
started while you are adjusting, servicing, or
installing the chuck. Always disconnect the
lathe from power before performing these
procedures.

All chucks must be properly

-20-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

PREPARATION

PREPARATION

Preparation Overview Things You'll Need

The purpose of the preparation section is to help
you prepare your machine for operation. The list
below outlines this basic process. Specific steps
for each of these points will be covered in detail
later in this section.

The typical preparation process is as follows:

1. Unpack the lathe and inventory the contents

of the box/crate.

2. Clean the lathe and its components.

3. Identify an acceptable location for the lathe

and move it to that location.

4. Level the lathe and either bolt it to the floor

or place it on mounts.

5. Assemble the loose components and make

any necessary adjustments or inspections to
ensure the lathe is ready for operation.

6. Check/lubricate the lathe.

To complete the preparation process, you will
need the following items:

For Lifting and Moving

• A forklift or other power lifting device
rated for at least 25% more than the
shipping weight of the lathe (see Product
Specifications beginning on Page 9)

• Lifting straps, each rated for at least 25%
more than the shipping weight of the lathe

• Guide rods for steading the load when lifting

• Two other people for assistance when moving
machine

• Hardwood blocking (see Page 27)

For Power Connection

• A power source that meets the minimum
circuit requirements for this machine (review
the Power Supply Requirements section
on the next page for details)

• An electrician or qualified service personnel
to ensure a safe and code-compliant
connection to the power source

7. Connect the lathe to the power source.

8. Test run the lathe to make sure it functions

properly.

9. Perform the spindle break-in procedure to
prepare the lathe for operation.

For Cleaning & Assembly

• Cotton rags

• Mineral spirits

• Quality metal protectant oil

• Safety glasses

• Wrench or socket 21mm

• Wrench or socket 19mm

• Floor mounting hardware as needed

• Precision level

• Standard screwdriver #2

-21-

Turn-Nado® Gearhead Lathes

The full-load current rating is the amperage
a machine draws at 100% of the rated output
power. On machines with multiple motors, this is
the amperage drawn by the largest motor or sum
of all motors and electrical devices that might
operate at one time during normal operations.

The full-load current is not the maximum
amount of amps that the machine will draw. If
the machine is overloaded, it will draw additional
amps beyond the full-load rating.

If the machine is overloaded for a sufficient
length of time, damage, overheating, or fire may
result—especially if connected to an undersized
circuit. To reduce the risk of these hazards,
avoid overloading the machine during operation
and make sure it is connected to a power supply
circuit that meets the requirements in the
following section.

Note: The circuit requirements in this manual
are for
machine will be running at a time. If this
machine will be connected to a shared circuit
where multiple machines will be running at
the same time, consult a qualified electrician to
ensure the circuit is properly sized.

A power supply circuit includes all electrical
equipment between the main breaker box or fuse
panel in your building and the incoming power
connections inside the machine. This circuit
must be safely sized to handle the full-load
current that may be drawn from the machine for
an extended period of time. (If this machine is

Serious injury could occur if you connect

PREPARATION

Power Supply
Requirements

Availability

Before installing the machine, consider the
availability and proximity of the required power
supply circuit. If an existing circuit does not meet
the requirements for this machine, a new circuit
must be installed.

To minimize the risk of electrocution, fire,
or equipment damage, installation work and
electrical wiring must be done by an electrician
or qualified service personnel in accordance with
all applicable codes.

the machine to power before completing the
setup process. DO NOT connect to power until
instructed later in this manual.

For Machines Mfg. Since 2/14

Circuit Requirements

This machine is prewired to operate on a 440V
power supply circuit that has a verified ground
and meets the following requirements:

Nominal Voltage ............................... 440V/480V

Cycle .............................................................60 Hz

Phase ....................................................... 3-Phase

Circuit Rating....................................... 30 Amps

Connection .. Hardwire with Locking Switch

Full-Load Current Rating

SB1046PF Full-Load Rating ......... 19.23 Amps

SB1047F Full-Load Rating ............ 19.23 Amps

SB1048PF Full-Load Rating ......... 19.23 Amps

SB1056F Full-Load Rating ............ 19.23 Amps

SB1057F Full-Load Rating ............ 19.23 Amps

SB1058F Full-Load Rating ............ 19.23 Amps

For your own safety and protection of property,
consult an electrician if you are unsure about
wiring practices or applicable electrical codes.

a dedicated circuit—where only one

-22-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

This machine must be grounded! In the event
of
grounding provides a path of least resistance
for electric current
electric shock.

PREPARATION

Grounding Requirements

certain types of malfunctions or breakdowns,

in order to reduce the risk of

Improper connection of the equipment-grounding
wire can result in a risk of electric shock. The
wire with green insulation (with or without
yellow stripes) is the equipment-grounding
wire. If repair or replacement of the power cord
is necessary, do not connect the equipment­grounding wire to a live (current carrying)
terminal.

Check with a qualified electrician or service
personnel if you do not understand these
grounding requirements, or if you are in doubt
about whether the machine is properly grounded.
If you ever notice that a cord is damaged or
worn, disconnect it from power, and immediately
replace it with a new one.

440V Operation

As specified in the Circuit Requirements
section on the previous page, these machines
must be hardwired to the power source, using a
locking switch (see Figure 10).

These machines must also be connected to a
grounded metal permanent wiring system; or to a
system with an equipment-grounding conductor.
Due to the complexity and high voltage involved,
this type of installation MUST be done by an
electrician or qualified service personnel.

LOCKING

DISCONNECT SWITCH

Power Source

Conduit

Ground Ground

Conduit

Machine

Electrocution or fire may
occur if machine is not
correctly grounded and
attached to the power
supply. Use an electrician or
qualified service personnel
to ensure a safe power
connection.

Figure 10. Typical hardwire setup with a locking

disconnect switch.

-23-

Turn-Nado® Gearhead Lathes

This item was carefully packaged to prevent
damage during transport. If you discover any
damage, please immediately call Customer
Service at
need to file a freight claim, so save the containers
and all packing materials for possible inspection
by the carrier or its agent.

Unpacking

PREPARATION

For Machines Mfg. Since 2/14

A

B

[phone] for advice. You may

Inventory

Main Inventory 1 (Figure 11) Qty

A. Steady Rest Assembly (Installed) ................. 1

B. 14" Faceplate w/D1-8 Camlock Stud Set ......1

C. 3-Jaw Chuck Key (Clamped on Lathe) .........1

D. Model SB1232 14" 4-Jaw Chuck

w/Combo Jaws ...............................................1

E. 4-Jaw Chuck Key ...........................................1

F. Tool Post T-Wrench (Clamped on Lathe)...... 1

G. Follow Rest Assembly (Installed) .................. 1

Tool Box Inventory (Figure 12) Qty

H. Tool Box .......................................................... 1

I. Open End Wrench 22/24mm .........................1

J. Open End Wrench 14/17mm .........................1

K. Open End Wrench 10/12mm .........................1

L. Combination Wrench 27mm .......................... 1

M. Phillips Screwdriver #2 ................................. 1

N. Standard Screwdriver #2 ............................... 1

O. Carbide-Tipped Dead Center MT#5 ..............1

P. Dead Center MT#5 .........................................1

Q . Tapered Spindle Sleeve MT#7-#5 .................1

R. Carriage Handwheel Handle .........................1

S. Cross Slide Handwheel Handle ..................... 1

T. Hex Wrench Set 1.5-10mm ............................ 1

U. Hex Wrench 10mm ........................................ 1

V. Cast Iron Feet ................................................ 8

G

U

C

F

Figure 11. Main inventory.

I

H

Q

T

S

R

V

Figure 12. Toolbox inventory.

D

E

L

J

K

M

N

O

P

Installed & Not Shown Qty

• SB1312 12" 3-Jaw Chuck .............................. 1

• SB1404 12

Note: Some inventory components or additional
documentation may be shipped inside of the
lathe electrical cabinet. These items MUST be
removed before connecting the lathe to the power
source.

-24-

1

⁄2" Back Plate for SB1312 ............1

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

The unpainted surfaces are coated
with a heavy-duty rust preventative that
prevents corrosion during shipment and
The benefit of this rust preventative is that it
works very well. The downside is that it
time-consuming

Be patient and do a careful job when
and removing the rust preventative
you spend doing this will reward you with
smooth
for the proper care of

Although there are many ways to successfully
remove the rust preventative, the
process works well in most situations

Before cleaning, gather the following:

• Disposable

• Cleaner/degreaser

• Safety

Note:

WD•40

Before using these products, though, test them
on an inconspicuous area of a painted surface to
make sure they will not damage it.



To clean off thick coats of rust preventative



PREPARATION

Cleaning & Protecting

at the factory

to thoroughly remove.

-sliding parts and a better appreciation
the unpainted surfaces.

rags

(certain citrus-based
degreasers work extremely well and they
have non-toxic fumes)

glasses&disposablegloves

Automotive degreasers, mineral spirits, or

canbeusedtoremoverustpreventative.

. The time

following

storage.

can be

cleaning

.

Avoid chlorine-based solvents, such as
acetone or brake parts cleaner that may
damage painted surfaces. Always follow the
manufacturer’s instructions when using any
type of cleaning product.

Basic steps for removing rust preventative:

1. Put on safety glasses and disposable gloves.

2. Coatallsurfacesthathaverustpreventative

with a liberal amount of your cleaner or
degreaser and let them soak for a few
minutes.

3. Wipe off the surfaces. If your cleaner or

degreaser is effective, the rust preventative
will wipe off easily.

Note:

on flat surfaces, such as beds or tables, use

aPLASTICpaintscrapertoscrapeoffthe

majority of the coating before wiping it off

withyourrag.(Donotuseametalscraperor

it may scratch the surface.)

4. Repeat Steps 2–3 as necessary until clean,

then coat all unpainted surfaces with a
quality metal protectant or light oil to
prevent rust.

GAS

Gasoline and petroleum
products have low flash
points and can explode
or cause fire if used for
cleaning. Avoid using these
products to remove rust
preventative.

Many cleaning solvents are
toxic if inhaled. Minimize
your risk by only using
these products in a well
ventilated area.

Remove the end gear cover and end gears,
and use a stiff brush with mineral spirits
to clean the rust preventative from the
gears and shafts. DO NOT get any cleaner
or rust preventative on the V-belts, as it
could damage them or make them slip
during operations. If the belts do become
contaminated, replace them.

-25-

Turn-Nado® Gearhead Lathes

Weight Load

equipment that may be installed on the machine,

Physical Environment

The physical environment where your machine
is operated is important for safe operation and
longevity of
machine in a dry environment that is free from
excessive moisture, hazardous
chemicals, airborne abrasives, or extreme
conditions. Extreme conditions for this type
of machinery are generally those where the
ambient temperature
104°F; the relative humidity
of
is subject to vibration, shocks, or bumps.

Electrical Installation

Place this machine near an existing power source
that meets the minimum circuit requirements
Make sure all power cords are protected from
traffic, material handling, moisture, chemicals,
or other hazards.
power source or engag

Lighting

Lighting around the machine must be adequate
enough that operations can be performed
safely. Shadows, glare, or strobe effects that
may distract or impede the operator must be

Location

PREPARATION

For Machines Mfg. Since 2/14

Location

parts. For best results, operate this

or flammable

is outside the range of 41°–

is outside the range

20–95% (non-condensing); or the environment

Leave access to disconnect the

e a lockout/tagout device.

Refer to the Machine Specifications for the
weight of your machine. Make sure that the
surface upon which the machine is placed will
bear the weight of the machine, additional

and the heaviest workpiece that will be used.
Additionally, consider the weight of the operator
and any dynamic loading that may occur when
operating the machine.

Space Allocation

Consider the largest size of workpiece that will
be processed through this machine and provide
enough space around the machine for adequate
operator material handling or the installation
of auxiliary equipment. With permanent
installations, leave enough space around

.

the machine to open or remove doors/covers
as required by the maintenance and service
described in this manual.

Min. 30"

21"

Keep
Workpiece
Loading Area
Unobstructed

Electrical

Access Door

Lathe

Wall

Children or untrained

A

= Power Connection Location

B

people may be seriously
injured by this machine.
Install machine in an
access restricted location.

SB1046PF

SB1047F

SB1048PF

48"

SB1056F

SB1057F

SB1058F

A B

132" 111"

152" 131"

191" 170"

112" 91"

132" 111"

152" 131"

-26-

Figure 13. Space required for full range of movement.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

PREPARATION

5. Position hardwood blocking under each

Lifting & Moving

end of the bed as shown in Figure 14.
This will keep the lifting straps away from
the leadscrew, feed rod, and spindle rod to
prevent bending them during lifting.

Note: Fasten a center support between the

hardwood blocking to that they will stay
spread apart and in place when lifting (see
the example in Figure 15).

(Loooking at Lifting Setup from Tailstock End)

To Power Lifting Equipment

Lifting
Strap

Leadscrew

This machine and its parts are heavy! Serious
personal injury may occur if safe moving
methods are not used. To reduce the risk of a
lifting or dropping injury, ask others for help,

Feed Rod

Control

Rod

Lathe

Bed

and use power equipment and guide rods.

Do not attempt to lift or move this lathe without
using the proper lifting equipment (such as
forklift or crane) or the necessary assistance from
other people. Each piece of lifting equipment
must be rated for at least 25% more than the
shipping weight of your lathe to support dynamic
loads that may be applied while lifting. Refer to
Things You'll Need on Page 21 for details.

To lift and move the lathe:

1. Remove the shipping crate top and sides,

then remove the small components from the
shipping pallet.

2. Move the lathe to its prepared location while

it is still attached to the shipping pallet.

3. Unbolt the lathe from the shipping pallet

4. To balance the load for lifting, move the

tailstock and carriage to the extreme right
end of the bedway, then lock them in place.

Hardwood Blocks

and Planks

Positioned as

Required to

Prevent Lifting

Straps from

Bending

Leadscrew

Figure 14. Lifting setup to keep straps from bending

leadscrew or rods.

Center

Support

Hardwood

Blocking

Figure 15. Example of blocking center support.

Note: Before attempting to move the carriage,

make sure the carriage lock is loose, the half
nut is disengaged, and the power feed is
disengaged (feed ON/OFF lever).

-27-

Turn-Nado® Gearhead Lathes

PREPARATION

6. Attach the lifting straps to the power lifting

equipment (see Figure 16 for an example).

Use Blocks as Necessary
to Space Straps Away
from Control Rod,
Feed Rod, and Leadscrew
to Prevent Bending when
the Lathe is Lifted

Power Lifting

Equipment

Lifting
Straps

For Machines Mfg. Since 2/14

Leveling & Mounting

You must level your machine and either use
the included foot pads and leveling hardware or
bolt and shim your lathe to the floor. Because
mounting your lathe to the floor with permanent
hardware is an optional step and floor materials
may vary, f loor mounting hardware is not
included.

Leveling

Hardwood
Blocking

Figure 16. Example of lathe setup for lifting.

Hardwood
Blocking

7. At each end of the lathe, have assistants

connect guide rods to safely keep the lathe
from swaying or tipping during lifting.

When lifting the lathe with straps, the load will
be top heavy. Take extra care to keep the load
balanced vertically and only lift it far enough
to remove the shipping pallet.

8. Raise the lathe a couple of inches and check

the balance of the load.

— If the load is not safely balanced,

immediately lower the lathe and resolve
the issue before attempting to lift it
again.

For accurate turning results and to prevent
warping the cast iron bed and ways, the lathe
bedways MUST be leveled from side-to-side
and from front-to-back on both ends.

Re-check the bedways 24 hours after
installation, two weeks after that, and then
annually to make sure they remain level.

Leveling machinery helps precision components,
such as bedways, remain straight and flat during
the lifespan of the machine. Components on a
machine that is not level may slowly twist due to
the dynamic loads placed on the machine during
operation.

For best results, use a precision level that
is at least 12" long and sensitive enough to
show a distinct movement when a 0.003" shim
(approximately the thickness of one sheet of
standard newspaper) is placed under one end of
the level.

9. Raise the lathe enough to clear the shipping

pallet, carefully remove the pallet, then
lower the lathe into position.

-28-

See the figure below for an example of a high
precision level.

Figure 17. Example of a precision level.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

To level the machine, use a precision level to
make sure the bedways are level from side-to­side and from front-to-back.

— If using the included leveling pads (see

Figure 18), place them under the six
leveling jack bolt locations, then adjust
the bolts to level the lathe.

Jack Bolts

Pads

Figure 18. Leveling pads and screws.

PREPARATION

Assembly

With the exception of the handwheel handles, the
lathe is shipped fully assembled.

To install the handwheel handles, thread the
large handle into the carriage handwheel and the
small handle into the cross slide handwheel, as
shown in Figure 20.

— If using mounting hardware that does not

allow for adjustment, level the lathe by
placing metal shims between the lathe
base and the floor before bolting it down.

Bolting to Concrete Floors

Lag screws and anchors, or anchor studs
(below), are two popular methods for bolting
machinery to a concrete floor. We suggest you
research the many options and methods for
mounting your machine and choose the best one
for your specific application.

Anchor

Stud

Lag Screw

and Anchor

Handwheel Handles

Figure 20. Handwheel handles installed.

Figure 19. Common types of fasteners for bolting

machinery to concrete floors.

Most electrical codes require that machines
connected to the power source by fixed
conduit MUST be secured to the floor.

-29-

Turn-Nado® Gearhead Lathes

PREPARATION

For Machines Mfg. Since 2/14

Lubricating Lathe

GEARBOXES MUST

BE FILLED WITH OIL!

LATHE MAY NOT

HAVE OIL INCLUDED!

Refer to the Lubrication

Section in this Manual

for Recommended

Oil Type.

The headstock, quick-change gearbox, and apron
oil reservoirs must have the proper amount of oil
in them before the lathe can be operated for the
first time.

Damage caused to the bearings and gears from
running the lathe without oil in the reservoirs
will not be covered under warranty. Refer to the
Lubrication section, beginning on Page 68, for
details on how to check, add oil, and prime the
headstock oil pump.

Power Connection

After you have completed all previous setup
instructions and circuit requirements, the
machine is ready to be connected to the power
supply.

Due to the complexity required for planning,
bending, and installing the conduit necessary for
a code-compliant hardwire setup, an electrician
or qualified service personnel MUST perform this
type of installation.

Hardwire setups typically require power supply
wires to be enclosed inside of a solid or flexible
conduit, which is securely mounted at both ends
with the appropriate conduit fittings. All work
must adhere to the required electrical codes.

The hardwire setup must include a locking
disconnect switch (see Figure 21) between the
power source and the machine. This switch
serves as the means to completely disconnect
the machine from power to prevent electrocution
from accidental startup during adjustments,
maintenance, or service to the machine.

In addition to the reservoirs, we also recommend
that you lubricate all other points on the
machine at this time. This can be accomplished
by following the maintenance schedule on
Page 66.

Note: If this lathe was shipped with oil in the
reservoirs, do not change that oil until after the
test run and spindle break-in procedures.

Adding Coolant

Add the coolant of your choice now. For detailed
instructions on where the coolant tank is located
and how to add fluid, refer to Coolant System
Service on Page 74.

Locking

Power Source

Conduit Conduit

Figure 21. Typical hardwire setup with a locking

Disconnect Switch

disconnect switch.

Machine

-30-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

Hot

Hot

Hot

Ground

PREPARATION

3. Connect the incoming hot wires to the

master power switch terminals and connect

Disconnect power supply! Electrocution
could occur if you attempt this procedure

the ground wire to the ground terminal, as
illustrated in Figure 23.

with the power wires connected to the power
source. The incoming power wires must be
disconnected from power before performing
this procedure.

Connecting Power

1. Make sure the master power switch is

turned to the OFF position, then open the
electrical cabinet door.

2. Refer to Figure 22 to identify the master

power switch and the hole at the bottom left
for the incoming power supply.

Master

Power

Switch

To Power

Supply

MASTER

POWER SWITCH

L1

Figure 23. Power connection at master power switch.

L2

L3

4. Make sure the wires have enough slack so

that they do not bind at the terminals.

5. Close and lock the electrical cabinet door.

To avoid unexpected start-up of lathe
components, keep the master power switch
turned OFF until instructed otherwise in the
Test Run.

Incoming Power Strain Relief

Figure 22. Electrical cabinet.

-31-

Turn-Nado® Gearhead Lathes

PREPARATION

Test Run

After all preparation steps have been completed,
the machine and its safety features must be
tested to ensure correct operation. If you discover
a problem with the operation of the machine or
its safety components, shut the machine down,
disconnect it from power, and do not operate it
further until you have resolved the problem.

A Troubleshooting section is provided, starting
on Page 88, to assist you with solutions if a
problem occurs or if the lathe does not function
as described in this section.

If you need additional help after reviewing the
troubleshooting section, or you are not confident
troubleshooting the machine on your own,
contact our Tech Support at [phone].

To test run your machine:

1. Make sure the master power switch

(Figure 24) on the rear of the machine is
turned OFF.

For Machines Mfg. Since 2/14

4. Make sure that the chuck and jaws, if

installed, are secure (refer to Chuck and
Faceplate Mounting on Page 37).

Note: If a chuck is not installed on the lathe, you

do not need to install one for this test.

5. Push the STOP button on the control panel

(see Figure 25), and point the coolant nozzle
into the chip pan.

Spindle Motor

Coolant Pump

OFF & ON

Buttons

Power

Lamp

Figure 25. Control panel.

OFF & ON

Buttons

STOP

Button

Master Power

Switch

Figure 24. Location of the master power switch.

2. Read and follow the safety instructions

at the beginning of the manual, take all
required safety precautions, and make sure
all previous preparation steps discussed
in this manual have been followed and
completed.

3. Clear away all tools and objects used during

assembly, lubrication, and preparation.

6. Move the spindle speed range lever

(Figure 26) so that the colors of the 210–500
RPM range align with the colors on the
stationary plate above the hub, then move
the spindle speed lever so that the green
arrow on the inner hub aligns with the green
bar of the 210 RPM label.

Stationary

Plate

Spindle Speed

Lever

Spindle Speed

Range Lever

Figure 26. Spindle speed set at 210 RPM.

Note: You may need to rock the spindle back

and forth by hand to get the gears to engage
when using the lever.

-32-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

PREPARATION

7. Move the gearbox range lever on the

headstock to the neutral (middle) position to
disable power feed, as shown in Figure 27.

LOW

Neutral

HIGH

Figure 27. Gearbox range lever in neutral.

8. Pull up on the half nut and the feed ON/OFF

levers (see Figure 28), then use the carriage
handwheel to move the carriage back and
forth to ensure that it is not engaged with
the leadscrew or feed rod.

9. To prevent the spindle from rotating when

power is applied to the motor, move the
spindle lever to the OFF (middle) position
(see Figure 28).

10. Turn the master power switch ON, then

reset the STOP button by twisting it
clockwise until it pops out. The power lamp
on the control panel should illuminate.

11. Push the spindle motor ON button and wait

for the motor to reach full speed.

12. Verify that oil is flowing against the

headstock sight glass shown in Figure 29.

Headstock Oil

Sight glass

Note: Steps 7–8 will ensure that the carriage

and cross slide do not unexpectedly move
during the following steps.

Spindle

Feed ON/OFF

Lever

Feed ON/OFF

Lever

Disengaged

Engaged

Half Nut Lever

Half Nut Lever

and Half Nut

Lever

Disengaged

Engaged

Figure 29. Headstock oil sight glass.

— If oil flow is not visible in the sight glass,

push the STOP button, disconnect the
lathe from power, then make sure the oil
tank is properly filled (see Headstock in
the Lubrication subsection on Page 68
for details).

— If the oil tank is correctly filled and oil

flow is still not visible in the sight glass,
disconnect the lathe from power and call
Tech Support for help.

Figure 28. Apron controls for test run.

-33-

Turn-Nado® Gearhead Lathes

PREPARATION

For Machines Mfg. Since 2/14

Note: The spindle clutch is tight when new

and may require moderate pressure on the
spindle lever to engage it until it is broken
in.

13. Move the spindle lever down to start the

spindle rotating counterclockwise (down
toward the front of the lathe).

— If the spindle rotates in the opposite

direction (clockwise), the power supply
phase polarity may be incorrect. Refer to
Correcting Phase Polarity on Page 92
to resolve this.

14. Observe the lathe and listen for any

abnormal noises or vibration. The lathe
should run smoothly.

15. Move the spindle lever to the OFF (middle)

position, let the spindle come to a complete
stop, then move the lever up to reverse
spindle rotation.

16. Push the STOP button. The spindle should

come to a slow stop.

1 7. With the STOP button pushed in, attempt

to start spindle rotation—the spindle should
not start.

— If the spindle does start, the STOP button

is not working properly. This safety
feature must operate properly before
continuing. Turn the master power switch
OFF, disconnect the lathe from power,
then call Tech Support for help.

18. Move the spindle lever to the OFF (middle)

position, reset the STOP button by twisting
it clockwise until it pops out, push the
spindle motor ON button, then restart
spindle rotation by moving the spindle lever
down again.

19. Press the foot brake. The spindle should

come to a quick stop.

— If the foot brake has no effect on the

stopping speed of the spindle, push the
STOP button to stop the lathe, disconnect
it from power, and call Tech Support for
help.

20. Push the STOP button to prevent an

accidental start-up.

21. Remove the end gear cover from the left side

of the headstock. There is a safety switch
that prevents the spindle from starting while
this cover is removed.

22. Reset the STOP button, push the spindle

motor ON button, stand away from all the
exposed gears on the side of the headstock,
then attempt to start spindle rotation—the
spindle should not start.

— If the spindle does start with the end gear

cover removed, the safety limit switch is
not adjusted or operating correctly. This
safety feature must operate properly
before continuing. Press the STOP button
to turn the lathe OFF, disconnect it from
power, and call Tech Support for help.

23. Push the STOP button in, move the spindle

lever to the OFF (middle) position, push the
spindle motor OFF button and wait for the
V-belts to stop, then replace the end gear
cover.

24. Reset the STOP button, press the spindle

motor ON button, then lift the chuck guard
up—this will activate the chuck guard safety
switch to prevent spindle rotation. Attempt
to start spindle rotation—the spindle should
not start.

— If the spindle does start with the chuck

guard in the up position, the safety switch
is not adjusted or operating correctly.
This safety feature must operate properly
before continuing. Press the STOP button
to turn the lathe OFF, disconnect it from
power, and call Tech Support for help.

25. Move the chuck guard back down into

operating position.

26. Point the coolant nozzle down into the chip

drawer and verify that there is coolant in the
reservoir (refer to Coolant System Service
on Page 74 for detailed instructions).

-34-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

PREPARATION

2 7. Use the coolant pump switch on the control

panel to start the pump, then open the valve
at the base of the nozzle. Verify that the
coolant flows from the nozzle, then close the
valve and turn the pump OFF.

Congratulations! The test run is complete.
Perform the following Spindle Break-In
procedure.

Spindle Break-In

Before subjecting the lathe to full loads, it
is essential to complete the spindle break-in
process as described below. This will ensure the
best results and maximum life of the precision
components inside the lathe.

The break-in procedure must be performed
in succession with the Test Run procedure
described in this manual, because many of the
test run steps prepare the lathe controls for the
break-in process.

Important: Do not perform the break-in
procedure independently from the Test Run
section—serious damage could occur to the lathe
if the controls are set differently than instructed
in that section.

3. Use the foot brake to stop spindle rotation,

then reverse spindle rotation with the
spindle lever, then run the lathe at 1600
RPM for 10 minutes.

4. Use the foot brake to stop spindle rotation,

then run the lathe at 150 RPM for ten
minutes with the gearbox range lever
(Figure 27) on the headstock in the L (low)
position, and then run the lathe for another
ten minutes with the lever in the H (high)
position.

5. While the oil is still warm and any metal

particles may still be suspended in the oil,
change the headstock and gearbox oil (refer
to Lubrication beginning on Page 68 for
detailed instructions).

6. Check, and if necessary, re-tention the

V-belts (refer to V-Belts on Page 80 for
detailed instructions).

Congratulations! The spindle break-in is
complete.

Recommended
Adjustments

Do not leave the lathe unattended during the
Spindle Break-In procedure. If your attention
is needed elsewhere during this procedure,
stop the lathe and restart the procedure later
from the beginning.

To perform the spindle break-in:

1. Successfully complete the Test Run

procedure beginning on Page 32.

2. Using the spindle speed levers to set the

spindle speed, run the lathe for ten minutes
at each of the following speeds: 50, 150, 500,
and 1600 RPM.

Note: If necessary, refer to Setting Spindle

Speed on Page 54 for detailed instructions.

For your convenience, the adjustments listed
below have been performed at the factory.
However, because of the many variables involved
with transporting the machine during shipping,
we recommend that you at least verify the
following adjustments to ensure the best possible
operational results from your new machine.

Step-by-step instructions for these adjustments
can be found on the pages referenced below.

Factory adjustments that should be verified:

• Tailstock alignment (Page 45).

• Compound and cross slide backlash
adjustment (Page 77).

• Gib adjustments (Page 78).

-35-

Turn-Nado® Gearhead Lathes

The purpose of this overview is to provide
the novice machine operator with a basic
understanding of how the machine is used during
operation, so they can more easily understand
the controls discussed later in this manual.

Note:

it is not intended to be an instructional guide
for performing actual machine operations.
To learn more about specific operations and
machining techniques, seek training from people
experienced with this type of machine, and do
additional research outside of this manual by
reading "how-to" books, trade magazines, or
websites.

OPERATION

For Machines Mfg. Since 2/14

OPERATION

Operation Overview

Due to the generic nature of this overview,

To reduce the risk of
serious injury when using
this machine, read and
understand this entire
manual before beginning
any operations.

To complete a typical operation, the operator
does the following:

1. Puts on safety glasses, rolls up sleeves,

removes jewelry, and secures any clothing,
jewelry, or hair that could get entangled in
moving parts.

2. Examines the workpiece to make sure it is
suitable for turning, then securely mounts
the workpiece in one of the chucks or on the
faceplate, and removes the chuck key from
the chuck.

3. Mounts the tooling, aligns it with the
workpiece, then backs it away to establish a
safe startup clearance.

4. Clears all setup tools from the lathe.

5. Checks for safe clearances by rotating

the workpiece by hand at least one full
revolution.

6. Moves slides to where they will be used
during operation.

7. Sets the correct spindle speed for the
operation.

Loose hair, clothing, or
jewelry could get caught
in machinery and cause
serious injury or death.
Keep these items away from
moving parts at all times to
reduce this risk.

During operation, small
metal chips may become
airborne, leading to serious
eye injury. Wear safety
glasses to reduce this risk.

8. If using power feed, selects the proper feed

rate for the operation.

9. Turns the master power switch ON, resets
the STOP button, presses the spindle motor
ON button, then verifies there is oil flow
visible in the headstock sight glass.

10. Uses the spindle lever to start spindle
rotation.

11. Uses the carriage handwheels or power
feed options to move the tooling into the
workpiece for operations.

12. When finished cutting, moves the spindle
lever to the OFF position, presses the foot
brake to completely stop the spindle, then
removes the workpiece.

-36-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

Because chucks are heavy and often awkward to
hold, some kind of lifting, support, or protective
device should be used during installation or
removal. The weight and size of the chuck will
determine the appropriate device to use (refer to
the following figure for examples).

Pre-Threaded Hole
for Lifting Eye

Way Slot

Jaw Slot

Plywood & 2x4
Chuck Cradle

Plywood Chuck Cradle
(Straight Cuts)

Plywood Chuck Cradle
(Curved Cuts)

Fabricated Steel
Lifting Hook

Solid Block
Chuck Cradle

Plywood Protection
Plate for Chucks
Installed by Hand

SMALL, LIGHTWEIGHT CHUCKS

MEDIUM-SIZE, HEAVY CHUCKS

LARGE, VERY HEAVY CHUCKS

OPERATION

Chuck & Faceplate
Mounting

This lathe is equipped with a D1-type spindle
nose. This type of spindle uses camlocks that are
adjusted with a chuck key to securely mount a
chuck or faceplate with repeatable precision and
ease.

Never use spindle speeds faster than the
chuck RPM rating or the safe limits of your
workpiece. Excessive spindle speeds greatly
increase the risk of the workpiece or chuck
being thrown from the machine with deadly
force!

This lathe ships with the 3-jaw chuck installed.
This is a scroll-type chuck where all three jaws
move in unison when the chuck key is used.

Installation & Removal
Devices

A dropped chuck can cause amputation,
serious crushing injuries, or property damage.
Always use a lifting, support, or protective
device to reduce this risk when installing or
removing a chuck.

The included 4-jaw chuck features independent
jaws, which are used for square or unevenly­shaped stock, and to mount work that needs to
be adjusted to near zero total indicated runout.

If neither chuck can hold your workpiece, the
cast iron faceplate has slots for T-bolts that hold
standard or custom clamping hardware. With the
correct clamping hardware, this faceplate will
hold non-cylindrical parts.

Figure 30. Examples of common devices used during

chuck installation and removal.

-37-

Turn-Nado® Gearhead Lathes

To ensure accurate work, it is extremely
important to make sure the spindle nose and
chuck mating surfaces/tapers are clean. Even
a small amount of lint or debris can affect
accuracy.

The chuck is properly installed when all
camlocks are tight, the spindle and chuck tapers
firmly lock together, and the back of chuck is
firmly seated against the face of the spindle all
the way around—without any gaps.

5. Incrementally tighten the camlocks in a

6.

nose, as shown in the following figure.

— If the cam line is NOT between the "V"

marks when the camlock is tight, the stud

positions on the chuck.

OPERATION

For Machines Mfg. Since 2/14

Chuck Installation

To install the chuck:

1. DISCONNECT LATHE FROM POWER!

2. Use an appropriate lifting, support, or

protective device to protect the ways and
support the chuck during the installation
process.

3. Clean and lightly oil the camlock studs, then

thoroughly clean the mating surfaces of the
spindle and chuck.

4. Install the chuck by inserting the camlock

studs straight into the spindle cam holes.

criss-cross or star pattern to ensure that the
chuck seats evenly against the spindle.

When the chuck is fully seated and all the

camlocks are tight, verify that the cam line
is between the two "V" marks on the spindle

Cam line between “V”s

Figure 32. Cam line positioned between the "V" marks

after the camlocks are fully tightened.

may be installed at the incorrect height.
To fix this, adjust the stud height as
shown in the following figure. Make sure
to re-install the stud cap screw afterward.

Important: Avoid inserting the studs by

pivoting them in from an angle or rotating
the spindle. This can damage studs or
spindle cam holes.

INCORRECTCORRECT

Figure 31. Inserting camlock studs into spindle cam

holes.

— If adjusting the stud height does not

correct the problem, try swapping stud

INCORRECT INCORRECT

Stud Too High:

Turn In

One-Turn

Figure 33. Correcting an improperly installed stud.

Stud Too Low:

Turn Out
One-Turn

-38-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

Lightly stamp registration marks across the
mating seams of chuck components. These marks
will help you re-install the chuck in the same
position after removal, which ensures consistent
chuck balance and turning results, and allows
the same camlocks and studs to operate together
for consistent locking and unlocking.

7. Verify that the chuck fits the spindle

properly by checking for any gaps between
the mating surfaces.

OPERATION

Chuck Removal

To remove the chuck:

— If there are no gaps, proceed to Step 8.

1. DISCONNECT LATHE FROM POWER!

— If there is a gap, remove the chuck, re-

clean the mating surfaces carefully, and
re-install. If the problem persists, contact
our Tech Support.

8. Verify that the chuck/spindle tapers

are seated firmly together by removing
the chuck, per the Chuck Removal
instructions, and pay close attention to how
easily the tapers release.

— If it was necessary to bump the chuck or

use a mallet to release the tapers, then
they are seating together properly.

— If the tapers released easily with little

intervention, they are not seated together
firmly as required. Remove the chuck, re­clean the mating surfaces carefully, and
re-install. If the problem persists, contact
our Tech Support.

Registration Marks

2. Use an appropriate lifting, support, or

protective device to protect the ways and
support the chuck (refer to Installation &
Removal Devices on Page 37).

3. Loosen the camlocks by turning the key
counterclockwise until each of the cam lines
are aligned with its corresponding spindle
mark (see Figure 35).

Cam line aligned with spindle mark

Figure 35. Camlock is fully loosened when the cam

line is aligned with the spindle mark.

Camlock
Spindle

Marks

for Chuck

Reassembly

Figure 34. Registration mark locations.

Spindle & Chuck

Registration Marks

Chuck
Halves

Direct Mount

Camlock Chuck

2-Piece

Tip: Camlocks can become very tight. A cheater

pipe may be used as a last resort to add
leverage when loosening. After loosening,
you may need to wiggle the chuck key in the
camlock to fully disengage the stud.

4. Using a dead blow hammer or other
soft mallet, lightly tap around the outer
circumference of the chuck body to loosen it
from the spindle.

5. Remove the chuck from the spindle, using
a light rocking motion to carefully slide the
studs out of the cam holes.

— If the chuck does not immediately come

off, rotate it approximately 60° and tap
it again. Make sure all the marks on the
cams and spindle are in proper alignment
for removal.

-39-

Turn-Nado® Gearhead Lathes

This scroll-type chuck has an internal scroll-gear
that moves all jaws in unison when adjusted with
the chuck key. This chuck will hold cylindrical
parts on-center with the axis of spindle rotation
and can be rotated at high speeds if the
workpiece is properly clamped and balanced.

Never mix jaw types or positions to
accommodate an odd-shaped workpiece.

The chuck will spin out of balance and
may throw the workpiece! Instead, use an
independent jaw chuck or a faceplate.

OPERATION

For Machines Mfg. Since 2/14

Scroll Chuck Clamping

Safer

Safer

Inside

UseJaw

Outside

UseJaw

Bar Stock

Unsafe Jaw Position and
Poor Scroll Gear Engagement

Shallow

Bar Stock

Insufficient
Jaw Clamping

Unstable
Workpiece

Poor

Grip

Unstable
Workpiece

4-Jaw Chuck

Refer to the Chuck Installation (see Page 38)
and Chuck Removal (see Page 39) instructions
to install or remove the 4-jaw chuck.

The 4-jaw chuck features independently
adjustable hardened steel jaws for holding non­concentric or off-center workpieces. Each jaw can
be independently removed from the chuck body
and reversed for a wide range of work holding
versatility.

Because of the dynamic forces involved in
machining a non-concentric or off-center
workpiece, always use a low spindle speed
to reduce risk of the workpiece coming loose
and being thrown from the lathe, which could
cause death or serious personal injury.

Mounting Workpiece

1. DISCONNECT LATHE FROM POWER!

2. Place a chuck cradle or plywood on the

bedway below the chuck to protect the
bedway surfaces.

Safer

Safer

Outside

UseJaw

Inside

UseJaw

Shallow

Bar Stock

Unsafe Jaw Position and
Poor Scroll Gear Engagement

Unsafe Jaw Position

Cylinder

InsideUnsafe

UseJaw

Figure 36. Jaw selection and workpiece holding.

Poor Scroll
Gear Engagement

-40-

3. Use the chuck key to open each jaw so the
workpiece will lay flat against the chuck
face, jaw steps, or into the spindle opening.

4. With help from another person or a holding
device, position the workpiece so it is
centered in the chuck.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

5. Tighten each jaw in small increments.

After you have adjusted the first jaw,
continue tightening the remaining jaws
in an opposing sequence, as shown by the
sequential order in Figure 37.

1

3

OPERATION

Workpiece

Centerpoint

Faceplate

Refer to the Chuck Installation (Page 38)
and Chuck Removal (Page 39) instructions to
install or remove the faceplate.

The faceplate included with your lathe can be
used for a wide range of operations, including
machining non-concentric workpieces, straight
turning between centers, off-center turning, and
boring.

The tools needed for mounting a workpiece will
vary depending on the type of setup you have.

4

Figure 37. 4-jaw tightening sequence.

6. After the workpiece is held in place by the

jaws, use a dial indicator to make sure the
workpiece is centered in the chuck.

— If the workpiece is not correctly centered,

make fine adjustments by slightly
loosening one jaw and tightening the
opposing jaw until the workpiece is
correctly positioned (see Figure 38 for an
example).

2

Machining non-concentric workpieces at a
high speed could cause the workpiece to be
thrown from the spindle with deadly force at
the operator or bystanders. To reduce this
risk, only machine non-concentric workpieces
at low speeds and clamp counter-weights to
the faceplate to balance it.

Failure to properly secure a workpiece to the
faceplate could cause the workpiece to be
thrown from the lathe with deadly force at the
operator or bystanders. Use a minimum of
THREE independent clamping devices to hold
the workpiece onto the faceplate.

Figure 38. Example photo of non-cylindrical workpiece

correctly mounted on the 4-jaw chuck.

-41-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

To mount a non-concentric workpiece to the
faceplate:

1. DISCONNECT LATHE FROM POWER!

2. Protect the bedway with a piece of plywood.

3. With help from another person or a holding

device to support the workpiece, position it
onto the faceplate and clamp it in place with
a minimum of three independent clamping
devices (see Figure 39 for an example).

Be sure to take into account the rotational

and cutting forces that will be applied to the
workpiece when clamping it to the faceplate.
If necessary, use counter-weights to balance
the assembly and use a dial indicator to
make sure that the workpiece is properly
positioned for your operation.

Non-Cylindrical

Workpiece

Quill Lock

Lever

Figure 40. Tailstock and quill lock levers in locked

position.

Graduated Dial

Increments .....................................................0.001"

One Full Revolution ......................................0.100"

Increments on Quill

Inch .................................... 0"-6" in

Metric .....................0–160mm in 1mm Increments

Tailstock Lock Lever

Tailstock

Handwheel

1

⁄8" Increments

Clamp

Faceplate

Figure 39. Example photo of workpiece clamped in a

faceplate.

Tailstock

The tailstock (see Figure 40) is typically used
to support long workpieces by means of a live or
dead center (refer to Centers on Page 46). It
can also be used to hold a drill or chuck to bore
holes in the center of a part. Custom arbors and
tapers can also be cut on your lathe by using the
offset tailstock adjustment.

Positioning Tailstock

1. Pull the tailstock lock lever backward (away

from the spindle) to unlock the tailstock from
the bedway.

2. Slide the tailstock to the desired position.

3. Push the tailstock lock lever forward (toward

the spindle) to lock the tailstock against the
bedway.

Using Quill

1. Move the quill lock lever toward the spindle

to unlock the quill.

2. Turn the tailstock handwheel clockwise
to move the quill toward the spindle or
counterclockwise to move it away from it.

3. Move the lock lever away from the spindle to
secure the quill in place.

-42-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Installing Tooling

This tailstock uses a quill with an MT#5 taper
that has a lock slot in the back of the bore that
accepts tang arbors and drill bits (see Figures
41–42 for examples).

Screw

Solid

Open

Solid

End

Figure 41. Types of tapered arbors and tooling.

End

End

End

Tang

However, other tooling without tangs, such as
the four remaining tools shown in Figure 41,
can still be used if the potential load will not
exceed the strength of the tapered fit. For
example, this includes smaller drill chucks, drill
bits, and centers.

Note: If the tooling has an open hole in the end
but is too short to be exposed in the drift slot
for removal, then a screw can be threaded into
the end of the tool to provide a solid surface for
the quill pin to push against when the quill is
retracted for tool removal. Otherwise, removal of
such tooling may be difficult.

To install tooling in the tailstock:

1. With the tailstock locked in place, unlock the

quill, then use the handwheel to extend it
approximately 1".

2. Thoroughly clean and dry the tapered
mating surfaces of the quill and the center,
making sure that no lint or oil remains on
the tapers.

Tang

Figure 42. Example photos of inserting MT#5 tools

with tangs into the tailstock.

Note: If the tapered tool shaft has a tang, align

it with the slot in the back of the quill before
seating it.

3. With a firm and quick motion, insert the
tool into the quill. Check to see if it is firmly
seated by attempting to twist it—a firmly
seated tool will not twist.

4. Unlock the tailstock and move it until the tip
of the tool is close to, but not touching, the
workpiece, then re-lock the tailstock.

5. Start spindle rotation, unlock the quill, then
turn the tailstock handwheel clockwise to
feed the tool into the workpiece.

-43-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

Removing Tooling

1. Use a shop rag to hold the tool.

2. Rotate the tailstock handwheel

counterclockwise until the tool is forced out
of the quill.

— If the tool does not come loose by

retracting the quill, extend the quill
and use a drift key in the slot shown in
Figure 43 to remove the tool.

Drift Key Slot

Figure 43. Drift key slot in the side of the quill.

To offset the tailstock:

1. Loosen the hex bolts underneath both ends

of the tailstock to release the clamping
pressure between the top and bottom
castings (see Figure 44).

Adjustment

Set Screw

(1 of 2)

Offset

Indicator

Figure 44. Tailstock offset controls.

2. Rotate the adjustment set screws in opposite

directions for the desired offset (see the
illustration in Figure 45).

Hex Bolt

(1 of 2)

Offsetting Tailstock

The tailstock can be offset from the spindle
centerline for turning tapers. Move the tailstock
top casting toward the front of the lathe to
machine a taper at the tailstock end. Conversely,
position the tailstock top casting toward the back
of the lathe to machine a taper at the spindle
end.

Note: The marks on the offset indicator are
arbitrary. For a precise offset, use a dial
indicator to check quill movement while
adjusting the screws.

Tools Needed Qty

Hex Wrench 6mm .................................................1

Wrench 17mm .......................................................1

Turn
CCW

Figure 45. Set screw adjustment in relation to

3. Retighten the clamping hex bolts underneath

the tailstock to secure the offset.

Turn
CW

tailstock movement.

Turn
CW

Turn
CCW

-44-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Aligning Tailstock to Spindle
Centerline

This is an essential adjustment that should be
verified or performed each time the tailstock
is used to turn concentric workpieces between
centers or immediately after offsetting the
tailstock when turning a taper. If the tailstock is
not aligned with the spindle centerline when it is
supposed to be, turning results will be inaccurate
along the length of the workpiece.

Items Needed Qty

Hex Wrench 6mm .................................................1

Wrench 17mm .......................................................1

Round Stock 2" x 6" ...............................................2

Precision Level ......................................................1

To align the tailstock to the spindle centerline:

1. Use the precision level to make sure the

bedway is level from side-to-side and from
front-to-back.

Note: As long as this dead center remains in the

chuck, the point of the center will remain
true to the spindle centerline. The point will
have to be refinished whenever the center is
removed and then returned to the chuck.

4. Install a center in the tailstock.

5. Attach a lathe dog to the test stock from

Step 2, then mount it between the centers
(see Figure 47 for an example).

— If the bedway is not level, correct

this condition before continuing with
this procedure (refer to Leveling &
Mounting on Page 28).

2. Center drill both ends of one piece of round

stock, then set it aside for use in Step 5.

3. Use the other piece of round stock to make

a dead center, and turn it to a 60° point, as
illustrated in Figure 46.

Figure 47. Example photo of stock mounted between

the centers.

6. Turn 0.010" off the stock diameter.

7. Mount a test or dial indicator so that the

plunger is on the tailstock quill.

Figure 46. Turning a dead center.

-45-

Turn-Nado® Gearhead Lathes

Note: If necessary in the following step, refer

to Offsetting Tailstock on Page 44 for
detailed instructions.

8. Use calipers to measure both ends of the

workpiece.

OPERATION

For Machines Mfg. Since 2/14

Centers

Figure 50 shows the MT#5 dead centers
included with the lathe. In addition, an MT#7–
MT#5 tapered spindle sleeve is included for
mounting centers in the spindle.

— If the test stock is thicker at the tailstock

end, move the tailstock toward the front of
the lathe
taper (see Figure 48).

Figure 48. Adjust tailstock toward the operator.

— If the test stock is thinner at the tailstock

end, move the tailstock toward the back of
the lathe
taper (see Figure 49).

1

⁄2 the distance of the amount of

Move the tailstock toward

the front of the lathe ½ the

distance of the taper.

Looking down from above.

1

⁄2 the distance of the amount of

Dead

Center

Carbide Tipped

Dead Center

Adapter

Sleeve

Figure 50. Adapter sleeve and dead centers.

Dead Centers

A dead center is a one-piece center that does not
rotate with the workpiece and is used to support
long, slender workpieces

Use the dead center in the spindle for operations
where the workpiece rotates with the center and
does not generate friction.

Looking down from above.

Move tailstock toward the

back of the lathe ½ the

distance of the taper.

Figure 49. Adjust tailstock away from the operator.

9. Repeat Steps 6–8 until the desired accuracy

is achieved.

-46-

The carbide-tipped dead center can better
withstand the effects of friction and is best
used in the tailstock where the workpiece will
rotate against it. The tip of the center must be
generously lubricated during the operation to
avoid premature wear and maximize smooth
operation. Using low spindle speeds will also
reduce the heat and wear from friction.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Live Centers

A live center has bearings that allow the center
tip and the workpiece to rotate together; it can be
installed in the spindle and the tailstock quill for
higher speeds. However, a live center typically
does not provide the same level of rigidity as a
dead center, and final workpiece accuracy can
suffer as a result.

Mounting Dead Center in Spindle

1. DISCONNECT LATHE FROM POWER!

2. Thoroughly clean and dry the tapered

mating surfaces of the spindle bore, adapter
sleeve, and the center, making sure that no
lint or oil remains on the tapers.

Note: This will prevent the tapered surfaces from

seizing due to operational pressures, which
could make it very difficult to remove the
center.

Removing Center from Spindle

To remove the sleeve and center from the
spindle, insert a piece of round bar stock or
similar tool through the outboard end (on the left
side of the headstock). Have another person hold
onto the sleeve and center with a gloved hand or
shop rag, then tap the sleeve loose.

To avoid premature wear of the dead center
or damage to the workpiece, use low spindle
speeds and keep the tip of the dead center
mounted in the tailstock well lubricated.

Mounting Center in Tailstock

Either a carbide-tipped dead center or live
center can be used in the tailstock. Mounting
instructions are the same for both. Figure
52 shows an example photo of a dead center
mounted in a tailstock.

3. Mount a chuck or faceplate onto the spindle,

whichever is correct for your operation.

4. Insert the center into the sleeve, then insert

the sleeve into the spindle bore through the
chuck or faceplate.

Figure 51 shows an example photo of a

dead center installed in the spindle, using a
lathe dog and faceplate for turning between
centers.

Dead Center

Lathe

Dog

Carbide-Tipped

Dead Center

Figure 52. Example photo of using a carbide-tipped

dead center installed in the tailstock.

To mount a center in the tailstock:

1. DISCONNECT LATHE FROM POWER!

2. Thoroughly clean and dry the tapered

mating surfaces of the tailstock quill bore
and the center, making sure that no lint or
oil remains on the tapers.

Figure 51. Example photo of using a dead center with

a faceplate and lathe dog.

-47-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

3. Use the tailstock handwheel to feed the quill

out from the casting approximately 1".

Note: Do not extend the quill more than 2" or

stability and accuracy will be reduced.

4. Insert the center into the tailstock quill.

5. Seat the center firmly into the quill during

workpiece installation by rotating the quill
handwheel clockwise to apply pressure, with
the center engaged in the center hole in the
workpiece.

Note: Only apply enough pressure with

the tailstock quill to securely mount
the workpiece between centers. Avoid
overtightening the center against the
workpiece, or it may become difficult to
remove later, and it will result in excessive
friction and heat, which may damage the
workpiece and center.

Mounting Workpiece Between
Centers

1. DISCONNECT LATHE FROM POWER!

2. Drill center holes in both ends of the

workpiece.

3. Install a dead center in the spindle with
a lathe dog and a chuck or faceplate, then
install a live center or carbide-tipped dead
center in the tailstock.

4. Lubricate the workpiece center holes, then
mount the workpiece between the centers
and hold it in place with light pressure from
the tailstock center.

5. Seat the center firmly into the quill by
rotating the tailstock handwheel clockwise
to apply pressure against the workpiece (see
the example in Figure 54).

Removing Center from Tailstock

To remove the center from the quill, hold onto it
with a gloved hand or shop rag, then rotate the
tailstock handwheel counterclockwise to draw
the quill back into the casting until the center
releases.

If the center does not come loose by retracting
the quill, extend the quill to expose the slot
shown in Figure 53, then use a drift key to
remove the center.

Drift Key Slot

Only apply enough pressure to securely

mount the workpiece between centers.
Avoid over-tightening the center against
the workpiece, or it may become difficult
to remove later. Also, over-tightening will
result in excessive friction and heat, which
may damage the workpiece or center.

Figure 54. Example photo of a workpiece mounted

between the centers.

Figure 53. Drift key slot in the side of the quill.

-48-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

!

Steady Rest

The steady rest supports long shafts and can
be mounted anywhere along the length of the
bedway.

Familiarize yourself with the steady rest
components shown in Figure 55 to better
understand its operation.

Adjustment

Screw

OPERATION

4. Loosen the clamp knob that secures the two
halves of the steady rest and open the top
portion, as shown in Figure 56.

Finger

Knob

Leaf

Finger

Roller

Clamp

Knob

Figure 55. Steady rest components.

To install and use the steady rest:

1. DISCONNECT LATHE FROM POWER!

2. Thoroughly clean all mating surfaces, then

place the steady rest base on the bedways
so the triangular notch fits over the bedway
prism.

3. Position the steady rest where required to

properly support the workpiece, then tighten
the hex nut shown in Figure 55 to secure it
in place.

Hex Nut

Figure 56. Workpiece mounted in the steady rest.

5. Loosen the three leaf screws so the finger

roller positions can be adjusted.

6. Use the finger adjustment knobs to position
the bottom two finger rollers against the
workpiece, as shown in the example of
Figure 56.

7. Close the steady rest, then use the finger
adjustment knobs to adjust all three finger
rollers so that they just touch the workpiece
without causing deflection.

Note: The finger rollers should properly support

the workpiece along the spindle centerline
while still allowing it to freely rotate.

8. Tighten the three leaf screws to secure the
settings.

-49-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

Follow Rest

The follow rest mounts to the saddle with two
cap screws (see Figure 57). It is used on long,
slender parts to prevent workpiece deflection
from the pressure of the cutting tool during
operation. Adjust the follow rest fingers in the
same manner as the those on the steady rest.

Note: To reduce the effects of friction, lubricate
the brass finger tips with generous lubricant
during operation.

Cap

Screws

Compound Rest

The compound rest handwheel has an indirect­read graduated scale. This means that the
distance shown on the scale represents the actual
distance the cutting tool moves. The base of the
compound rest has another graduated scale used
for setting the cutting tool to a specific angle.

Graduated Dial

Increments ....................................0.001" (0.02mm)

One Full Revolution .....................0.100" (2.54mm)

Tool Needed Qty

Wrench 14mm .......................................................1

To set the compound rest at a certain angle:

1. Loosen the two acorn nuts at the base of the

compound rest (1 of 2 shown in Figure 59).

Compound

Rest

Figure 57. Follow rest attachment.

Carriage & Compound
Rest Locks

The carriage and compound rest have locks that
can be tightened to provide additional rigidity
during operation, especially during heavy cuts.

See Figure 58 to identify the locations of the
locks for each device.

Compound Rest

Lock

Carriage

Lock

Acorn Nut

(1 of 2)

Figure 59. Compound rest.

2. Rotate the rest to the desired angle, as

indicated by the scale at the base, then
retighten the two acorn nuts.

Tip: The first time you set the angle of the

compound rest for cutting threads, mark
the location on the cross slide as a quick
reference point. This will allow you to
quickly return the compound rest to that
exact angle the next time you need to cut
threads.

Angle Scale

Figure 58. Compound rest and carriage locks.

-50-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Four-Way Tool Post

The four-way tool post is mounted on top of the
compound rest and allows a maximum of four
tools to be loaded simultaneously.

Each tool can be quickly indexed to the workpiece
by loosening the top handle, rotating the tool
post to the desired position, then re-tightening
the handle to lock the tool into position.

Installing Tool

Tool Needed Qty

Tool Post T-Wrench ...............................................1

To install a tool in the tool post:

1. Adjust the tool post bolts so that the

cutting tool can fit underneath them (see
Figure 60).

Aligning Cutting Tool with Spindle
Centerline

For most operations, the cutting tool tip should
be aligned with the spindle centerline, as
illustrated in Figure 61.

Cutting

Tool

Figure 61. Cutting tool aligned with spindle centerline

(viewed from tailstock).

Spindle
Center

Line

Tool Post

Bolt

Cutting

Tool

Figure 60. Example of tool mounted in tool post.

Over-extending a cutting tool from the post
will increase the risk of tool chatter, breakage,
or tool loosening during operation, which
could cause metal pieces to be thrown at the
operator or bystanders with great force. DO
NOT extend a cutting tool more than 2.5 times
the width of its cross-section or less (e.g, 2.5
x 0.5" = 1.25").

2. Firmly secure the cutting tool with at least

two tool post bolts.

There are a number of ways to check and align
the cutting tool to the spindle centerline. If
necessary, you can raise the cutting tool by
placing steel shims underneath it. The shims
should be as long and as wide as the cutting tool
to properly support it.

Below are two common methods:

Align the tip of the cutting tool with a center

•
installed in the tailstock, as instructed on
the next page. For this to work, the tailstock
must be aligned to the spindle centerline
(refer to Aligning Tailstock To Spindle
Centerline on Page 45 for detailed
instructions).

• Make a facing cut on a piece of round bar
stock. If the tool is above or below the
spindle centerline, a nub will be left in the
center of the workpiece. Adjust the height of
the tool, then repeat the facing cut to check
the adjustment. Repeat as necessary until
the center of the workpiece face is smooth.

3. Check and adjust the cutting tool to the

spindle centerline, as instructed in the next
subsection.

-51-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

Tools Needed Qty

Tool Post T-Wrench ...............................................1

Steel Shims ............................................ As Needed

Cutting Tool ...........................................................1

Fine Ruler ..............................................................1

Tailstock Center .................................................... 1

To align the cutting tool with the tailstock
center:

1. Mount the cutting tool in the tool post, then

secure the post so the tool faces the tailstock.

2. Install a center in the tailstock, and position

the center tip near the cutting tool tip.

3. Lock the tailstock and quill in place.

4. Adjust the height of the cutting tool so

that the tool tip is aligned vertically and
horizontally with the center tip, as shown in
Figure 62.

Micrometer Stop

The micrometer stop is used to limit carriage
travel for production runs or make final
adjustments to the carriage position.

If power feed is being used and the carriage
clutch is correctly adjusted, the carriage will
disengage from the feed rod when it contacts the
micrometer stop and movement will stop. Refer
to Carriage Feed Clutch Knob on Page 56 for
detailed instructions on adjusting the carriage
clutch.

The micrometer stop is not designed to stop
carriage movement when the leadscrew is
engaged for threading operations—doing so
may damage the micrometer stop or lathe
components.

(Top View)

Tailstock

Center

Cutting

Tool

Cutting

Tool

Figure 62. Cutting tool tip aligned with tailstock

center.

Tailstock

Center

(Side View)

Tools Needed Qty

Hex Wrench 8mm .................................................1

To set the micrometer stop:

1. DISCONNECT LATHE FROM POWER!

2. Loosen the cap screws shown in Figure 63,

then use the carriage handwheel to position
the carriage and cutting tool at the desired
stopping point.

Cap Screws

Graduated

Dial

Figure 63. Micrometer stop.

3. Move the micrometer stop up to the carriage,

use the graduated dial to fine tune the
position, then retighten the cap screws
loosened in Step 2.

Stop Rod

-52-

4. Verify that tooling will not make contact
with the chuck, jaws, or other components.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Manual Feed

The handwheels shown in Figure 64 allow the
operator to manually move the cutting tool.

Cross Slide
Handwheel

Carriage

Handwheel

Figure 64. Carriage controls for manual feed.

Carriage Handwheel

The carriage handwheel moves the carriage left
or right along the bed. It has a graduated dial
with 0.01" increments, and one full revolution
moves the carriage 0.80". Pull the handwheel out
to disengage it during power feed operations—
this will prevent entanglement hazards.

Compound Rest

Handwheel

Spindle Speed

Using the correct spindle speed is important
for safe and satisfactory results, as well as
maximizing tool life.

To set the spindle speed for your operation, you
will need to: 1) Determine the best spindle speed
for the cutting task, and 2) configure the lathe
controls to produce the required spindle speed.

Determining Spindle Speed

Many variables affect the optimum spindle speed
to use for any given operation, but the two most
important are the recommended cutting speed
for the workpiece material and the diameter of
the workpiece, as noted in the formula shown in
Figure 65.

*Recommended

Cutting Speed (FPM) x 12

Dia. of Cut (in inches) x 3.14

*Double if using carbide cutting tool

Figure 65. Spindle speed formula for lathes.

= SpindleSpeed (RPM)

Cross Slide Handwheel

The cross slide handwheel moves the tool
toward and away from the work. Adjust the
position of the graduated scale by holding the
handwheel with one hand and turning the dial
with the other. The cross slide handwheel has
a direct-read graduated dial, which shows the
total amount of material removed from the
diameter of the workpiece (i.e., half the amount
of tool movement). The dial has 0.001" (0.02mm)
increments, and one full revolution moves the
slide 0.100" (5.08mm). Rotate the dial collar 180°
to read in metric units.

Compound Rest Handwheel

The compound rest handwheel moves the cutting
tool linearly along the set angle of the compound
rest. The compound rest angle is set by hand­rotating it and securing in place with two hex
nuts. The compound rest has an indirect-read
graduated dial with 0.001" (0.02mm) increments.
One full revolution of the handwheel moves the
slide 0.100" (2.54mm). Rotate the dial collar 180°
to read in metric units.

Cutting speed, typically defined in feet per
minute (FPM), is the speed at which the edge of a
tool moves across the material surface.

A recommended cutting speed is an ideal speed
for cutting a type of material in order to produce
the desired finish and optimize tool life.

The books Machinery’s Handbook or Machine
Shop Practice, and some internet sites, provide
excellent recommendations for which cutting
speeds to use when calculating the spindle speed.
These sources also provide a wealth of additional
information about the variables that affect
cutting speed and they are a good educational
resource.

Also, there are a large number of easy-to-use
spindle speed calculators that can be found on
the internet. These sources will help you take
into account the applicable variables in order
to determine the best spindle speed for the
operation.

-53-

Turn-Nado® Gearhead Lathes

Setting Spindle Speed

OPERATION

For Machines Mfg. Since 2/14

1. Make sure the spindle is turned OFF and it

has come to a complete stop.

2. Find the spindle speed range in the following

options that is closest to your calculated
spindle speed:

— 20, 25, 35, and 50 RPM

— 65, 85, 115, and 150 RPM

— 210, 280, 380, and 500 RPM

— 670, 900, 1200, and 1600 RPM

3. Move the spindle speed range lever (see

Figure 66) so that the colors of the selected
spindle speed range align with those of the
stationary plate.

Stationary

Plate

Operating the lathe at spindle speeds higher
than 350 RPM when the high (H) gearbox
range is selected could result in gearbox
damage. Always use spindle speeds of
350 RPM or lower when using the high (H)
gearbox range.

Power Feed

Both the carriage and cross slide have power feed
capability when the carriage is engaged with the
feed rod. The rate that these components move
(feed rate) is controlled by the headstock and
quick-change gearbox lever positions, and the
end gear configuration.

Feed rate and spindle speed must be considered
together. Keep in mind that the feed rate is
expressed in the amount of travel per revolution
of the spindle. The sources you use to determine
the optimum spindle speed for an operation will
also provide the optimal feed rate to use with
that spindle speed.

Spindle Speed

Lever

Figure 66. Spindle speed of 1600 RPM is selected.

4. Move the spindle speed lever to align the

arrow on the inner hub with the same color
as your selected speed on the outer hub.

Spindle Speed

Range Lever

Often, the experienced machinist will use the
feeds and speeds given in their reference charts
or web calculators as a starting point, then
make minor adjustments to the feed rate (and
sometimes spindle speed) to achieve the best
results.

The carriage can alternatively be driven by the
leadscrew for threading operations. However,
this section only covers the use of the power
feed option for the carriage and cross slide
components for non-threading operations. To
learn how to power the carriage for threading
operations, refer to Threading on Page 59.

-54-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Power Feed Controls

Use Figures 67–71 and the following
descriptions to become familiar with the locations
and functions of the controls that you will use to
set up the correct power feed for your operation.

Note: Before using power feed, you may have to
re-configure the end gears, depending on how
they are set up. Refer to End Gears on Page 58
for detailed instructions.

Gearbox Range Lever: Selects the low or high
feed rate range by re-aligning the headstock
transfer gear. In the middle position, disables
power feed (see Figure 67).

LOW

Neutral

HIGH

Headstock Feed Direction Lever: Selects the
direction of power feed (see Figure 68).

Note: The spindle must be stopped to use this
lever. When the lathe is running, use the apron
feed direction knob.

FORWARD

REVERSE

Figure 68. Headstock feed direction lever.

Quick-Change Gearbox Feed Levers: Configure

the quick-change gearbox gears for the feed rate
selected per the feed chart (see Figure 69).

Figure 67. Gearbox range lever.

Operating the lathe at spindle speeds higher
than 350 RPM could result in gearbox damage
when the high (H) gearbox range is selected.
Always use spindle speeds of 350 RPM or
lower when using a high gearbox range.

Feed Rate

Chart

Left

Figure 69. Quick-change gearbox controls.

Middle

Bottom

Right

-55-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

Feed Selection Knob: Selects the carriage or
cross slide for power feed (see Figure 70).

When the knob is pulled out, the cross slide is
selected. Conversely, when the knob is pushed in,
the carriage is selected.

Apron Feed

Direction Knob

Feed Selection

Knob

Figure 70. Apron feed selection and direction knobs.

In the middle position, the apron gears are
disengaged from the feed rod and neither
component will move.

Note: When using this control, you may need
to rock the handwheel of the component being
engaged so that the apron gears will mesh.

Apron Feed Direction Knob: Changes power feed
direction (see Figure 70),

Carriage Feed Clutch Knob: Adjusts how easily
the carriage clutch will disengage automatic
feeding when the carriage contacts a feed stop or
in the event of a crash. Tightening this knob all
the way disables the carriage clutch completely
(see Figure 71).

Carriage Feed

Clutch Knob

Figure 71. Adjustable carriage feed clutch knob.

The carriage clutch serves two purposes: 1) It
disengages the carriage feed when the carriage
contacts a feed stop, providing a precise
repeatable stopping point; and 2) it provides
a safety factor in the event of an accidental
overload or crash.

The correct carriage clutch setting will depend
on variables of the operation, such as workpiece
material, depth of cut, power feed rate, and
others. Finding this clutch setting is a matter of
trial-and-error and experience.

When pushed in or pulled out, this knob quickly
reverses the power feed direction while the
spindle is rotating—without having to turn the
lathe off and use the feed direction lever on the
headstock.

Depending on the combined configuration
of the feed direction lever on the headstock
and the feed direction knob on the apron,
the actual direction of power feed may be
different from the printed indicators on the
machine!

-56-

For a starting point of clutch adjustment, rotate
the carriage feed clutch knob clockwise until it is
tight, then back it off counterclockwise three full
revolutions. This is a reasonably conservative
setting to start with. If necessary, further adjust
the knob for the setting that is right for your
operation.

The carriage clutch will not stop carriage
movement when it is engaged with the
leadscrew for threading.

If the carriage feed clutch knob is completely
tight (all the way clockwise), it will be
disabled, which will not allow it to help
prevent damage in event of a crash.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Setting Power Feed Rate

The power feed rate chart displays the settings
for the headstock feed controls for metric and
inch feed rates (see Figure 72).

Feed Rate

Chart

Figure 72. Power feed rate chart.

Using the controls on the lathe, follow along with
the example below to better understand how to
set the lathe for the desired power feed rate.

Note: In the next step, use the chuck key to rock

the spindle back and forth to help mesh the
gears as you make adjustments.

3. For a power feed rate of 0.0025"/rev., use the
configuration string of characters to the left
of the selected feed rate (LCT7Y) to configure
the controls as follows:

L Move the gearbox range lever on the

headstock up to the low position.

C Point the left gearbox lever to “C”.

T Point the middle gearbox lever to “T”.

7 Position the bottom gearbox lever in slot

“7”.

Y Point the right gearbox lever to “Y”.

The lathe is now set up for a power feed rate of

0.0025" per spindle revolution.

Example: Power Feed Rate of 0.0025"/rev

1. Make sure the end gears are in the standard

configuration, which is applicable for general
feeding operations (refer to End Gears on
the Page 58 for detailed instructions).

2. Locate the line in the feed rate chart that

lists the setting for 0.0025" of feed per
revolution of the spindle, as illustrated in
Figure 73.

Feed Rate of

0.0025"/rev.

Requires a

Configuration of

LCT7Y

When using power feed to move the cross

1

slide, the feed rate is

⁄2 the value stated in

the feed rate chart.

Figure 73. Feed rate chart.

-57-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

End Gears

The end gears on the side of the headstock can be
setup for the standard or alternate configuration,
depending upon the type of operation to be
performed. The lathe is shipped with the end
gears in the standard configuration.

To access the end gears, remove the end gear
cover from the left side of the headstock

Standard End Gear Configuration

Use the standard end gear configuration (see
Figure 74) for inch threading, metric threading,
and all general feed operations.

24T

44T

Alternate End Gear Configuration

Use the alternate end gear configuration
when cutting modular or diametral pitches, as
illustrated in Figure 75.

24T

56T

44T

Modular and Diametral

Pitches

57T

Spacer

Figure 75. Alternate end gear configuration.

Configuring End Gears

56T

57T

24T

56T

44T

Inch and Metric

Threading

Spacer

57T

Figure 74. End gears in the standard configuration.

Inch and Metric Feeding

Tools Needed Qty

Hex Wrench 6mm .................................................1

Wrench 22mm .......................................................1

To configure the end gears:

1. DISCONNECT LATHE FROM POWER!

2. Remove the end gear cover from the left side

of the headstock.

3. Remove the cap screw, lock washer, and
flat washer from the 57T end gear (see
Figure 76).

57 Tooth

Gear

Cap Screw,

Washers &

Pivot Arm

Hex Nut

Spacer

-58-

Figure 76. End gear components.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

4. Loosen the pivot arm hex nut shown in

Figure 76, then swing the pivot arm to the
left so that the 44T/56T gears are away from
the 57T gear. Hand tighten the hex nut to
keep the arm in place.

As you remove and replace end gears, use
a stiff brush and mineral spirits to clean
away the debris and grime from them, then
re-lubricate them as instructed in End Gears
on Page 73.

5. Making sure to keep the shaft key firmly

seated, remove the spacer and the 57T gear,
then re-install them as follows:

OPERATION

Threading Controls

The following subsections describe how to use
the threading controls and charts on this lathe.
If you are unfamiliar with the process of cutting
threads on a lathe, we strongly recommend that
you read books, review industry trade magazines,
or get formal training before doing any threading
projects.

Headstock & Gearbox Threading
Controls

The threading charts on the headstock face
display the settings for metric and inch
threading, and modular and diametral pitches.

— For the standard end gear configuration,

slide the 57T gear on first, then the spacer
on the outside.

— For the alternate end gear configuration,

slide the spacer on first, then the gear.

6. Re-install the cap screw, lock washer, and

flat washer you removed in Step 3 to secure
the spacer and 57T gear. Do not overtighten.

7. Slide the pivot arm back so that either the

44T or the 56T meshes with the 57T gear,
then retighten the pivot arm hex nut.

Note: Make sure to keep approximately 0.002"

play between the gears.

8. Replace and secure the end gear cover before

re-connecting the lathe to power.

For inch or metric threads, use the standard end
gear configuration. For modular or diametral
pitches, use the alternate configuration

Use the controls on the lathe and follow along
with the example below to better understand
how to set up the lathe for the desired threading
operation.

Example: Metric Thread Pitch of 2.5mm

1. Make sure the end gears are in the standard

configuration, which is used for all metric
threading (refer to End Gears on Page 58
for detailed instructions).

2. Locate the line in the metric thread chart
that lists the setting for 2.5mm threads, as
illustrated in Figure 77.

Metric Thread

Width of 2.5mm

Figure 77. Metric thread chart.

-59-

Turn-Nado® Gearhead Lathes

OPERATION

Note: In the next step, use the chuck key to rock

the spindle back and forth to help mesh the
gears as you make adjustments.

3. For a metric thread pitch of 2.5mm, use the

configuration string of characters to the
right of the selected thread pitch (LCR3Z) to
position the threading controls as follows:

L Move the gearbox range lever to the low

position.

C Point the left gearbox lever to the C.

R Point the middle gearbox lever to the R.

3 Position the bottom gearbox lever in the

3 slot.

Z Point the right gearbox lever to Z.

For Machines Mfg. Since 2/14

Half Nut

Lever

Feed ON/OFF

Lever

The lathe is now setup to cut a 2.5mm thread
pitch.

Apron Controls

The half nut lever engages the apron with
the leadscrew which moves the carriage and
cutting tool along the length of the workpiece for
threading operations (see Figures 78–79).

Important: Make sure the feed control lever
is in the disengaged (middle) position before
attempting to engage the half nut.

Attempting to engage the half nut while the
cross slide or carriage is engaged with the
feed rod could cause severe damage to the
lathe. Never attempt to engage the half nut
while the feed control lever is engaged.

Figure 78. Carriage controls.

Feed ON/OFF

Lever

Disengaged

Engaged

Figure 79. Feed ON/OFF lever and half nut positions

for threading.

Half Nut Lever

and Half Nut

Disengaged

Engaged

-60-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Thread Dial

The numbers on the thread dial are used with
the thread dial chart to show when to engage the
half nut during inch threading. The thread dial
gear must be engaged with the leadscrew for this
to work. Loosen the knurled knob on the thread
dial, pivot the dial gear toward the leadscrew
so that it properly meshes with the leadscrew
threads, then re-tighten the knob, as shown
Figure 80.

Leadscrew

Dial Gear

Knurled

Knob

Thread Dial Chart

Find the TPI (threads per inch) that you want
to cut in the left column of the thread dial chart
(see Figure 81), then reference the dial number
to the right of it. The dial numbers indicate when
to engage the half nut for a specific thread pitch.
The thread dial chart can also be found on the
front of the thread dial housing.

In.

4,8,12,16,20,24,
28,32,36,40,44,
48,56,60,72

2,6,10,14,
18,22,26,
30,54

3,5,7,9,
11,13,15,
19,23,27

2½,3½,4½,
7½,11½,13½

2¼,2¾,
3¼,3¾

7

∕8

2

2

3

1

4

Any Position

Non­Numbered
Position
Numbered
Position
1,2,3,4

Position
1,3 or 2,4

Position
1 Only

Same as
Metric
Threads

Figure 80. Thread dial engaged with the leadscrew.

When threading, we recommend using the
slowest speed possible and avoiding deep
cuts, so you can more easily disengage the
half nut to prevent an apron crash!

Figure 81. Thread dial chart.

Note: The thread dial is not used for metric

threading, or diametral and modular pitches.
With these, you must leave the half nut engaged
until the turning is complete.

The following examples explain how to use the
thread dial chart for inch threads.

TPI Divisible By 4

For threading a TPI that is divisible by four, use
any line on the thread dial (see Figure 82).

TPI

4,8,12,16,20,24,

Any Position
28,32,36,40,44,
48,56,60,72

Figure 82. Any position on the dial for threading TPI

divisible by 4.

-61-

Turn-Nado® Gearhead Lathes

OPERATION

For Machines Mfg. Since 2/14

Even TPI Not Divisible By 4

For threading a TPI that is even but not divisible
by 4, use any of the non-numbered lines on the
thread dial (see Figure 83).

TPI

2,6,10,14,
18,22,26,
30,54

Figure 83. Marks are selected on the dial for threading

Non­Numbered
Position

even TPI not divisible by 4.

Odd Numbered TPI

For odd numbered TPI, use any of the numbered
lines on the thread dial (see Figure 84).

TPI

3,5,7,9,
11,13,15,
19,23,27

Numbered
Position
1,2,3,4

1

⁄4 or 3⁄4 Fractional TPI

For TPI that have a

1

⁄4 or 3⁄4 fraction, use position

1 on the thread dial (see Figure 86).

TPI

2¼,2¾,
3¼,3¾

Figure 86. Position for 1⁄4 or 3⁄4 fractional TPI.

7

2

⁄8 TPI

The thread dial is not used for 2

Position
1 Only

7

⁄8 or metric
threading, or diametral and modular pitches (see
Figure 87). The half nut must stay engaged with
the leadscrew throughout the entire threading
operation.

27∕8

Same as
Metric
Threads

Thread Dial

Not Used

Figure 84. Numbers are selected on the dial for

threading odd numbered TPI.

1

⁄2 Fractional TPI

Use any opposing number pairs—2/4 or 1/3 on
the thread dial for

1

⁄2 fractional TPI (see Figure

85). For example, to cut a 31⁄2 thread, select 1 or 3
on the dial.

TPI

2½,3½,4½,
7½,11½,13½

Figure 85. Opposing number group are selected on

dial for cutting 1⁄2 thread TPI.

Position
1,3 or 2,4

Figure 87. Half nut stays engaged for 2

7

⁄8 TPI.

-62-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

OPERATION

Chip Drawer

The chip drawer catches swarf and metal chips
during the machining process. It contains a
screen that keeps the large chips from returning
to the reservoir with the run-off coolant—this
prevents the chips causing pump damage.

Also, it slides open and is removable for cleaning
(see Figure 88).

Chip

Drawer

Figure 88. Chip drawer.

Coolant System

When the coolant pump is turned ON, the fluid
is delivered through the nozzle attached to the
carriage. The flow is controlled by the valve lever
at the base of the nozzle (see Figure 89).

Coolant Pump

OFF & ON

Buttons

Valve

Lever

Figure 89. Coolant flow controls.

Always use high quality coolant and follow the
manufacturer's instructions for diluting and
maintenance. The quick reference table shown
in Figure 90 can help you select the appropriate
fluid.

The chip drawer is very heavy. Unless
removing the chip drawer for cleaning, do
not pull it out more than halfway to prevent it
falling and causing impact injuries. If removing
the drawer for cleaning, get assistance!

Workpiece Dry

Aluminum

Brass

Bronze

Cast iron

Low Carbon Steel

Alloy Metals

Stainless Steel

General Note: Coolants are used for heavy-duty lathe operations and production turning. Oil-water
emulsions and synthetic cutting fluids are the most common for typical lathe operations. Sulferized oils
often are used for threading. For small projects, spot lubrications can be done with an oil can or brush, or
omitted completely.

X X X

X X X X

X

Figure 90. Coolant selection table.

Soluble Oil

Refer to Coolant System Service on Page 74
for detailed instructions on how to add or change
fluid. Check the coolant regularly and promptly
change it when it becomes overly dirty or rancid,
or as recommended by the fluid manufacturer.

Water

X X

X X

X X X X

X X X X

Synthetic

Coolants

Sulferized

Oil

Mineral

OIl

-63-

Turn-Nado® Gearhead Lathes

OPERATION

Rod Support

For Machines Mfg. Since 2/14

BIOLOGICAL & POISON

HAZARD!
Use the correct personal
protection equipment when
handling coolant. Follow
federal, state, and fluid
manufacturer requirements
for proper disposal.

Running the pump without adequate fluid in
the coolant tank may permanently damage it,
which will not be covered under warranty.

To use the coolant system on your lathe:

1. Make sure the coolant tank is properly

serviced and filled with the appropriate
fluid, and that you are wearing the necessary
personal protection equipment.

2. Position the coolant nozzle for your

operation.

3. Use the coolant pump switch on the control

panel to turn the pump ON.

4. Adjust the flow of coolant by using the valve

lever near the base of the nozzle hose.

Models SB1047F, SB1048PF, and SB1058F
include a rod support that gives additional
reinforcement to the leadscrew and feed rod (see
Figure 91).

Rod

Support

Figure 91. Rod support.

Ideally, the best position along the bed for the
rod support is mid-way between the right end of
the leadscrew and the farthest place toward the
tailstock that the carriage will travel during the
operation.

Use a 6mm hex wrench to loosen the cap screws
that secure the clamp plate, position the rod
support where desired, then re-tighten the cap
screws.

Important: Promptly clean any splashed fluid

from the floor to avoid a slipping hazard.

-64-

To avoid lathe damage, make sure the carriage
will not crash into the rod support when using
longitudinal power feed.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

ACCESSORIES

ACCESSORIES

Accessories

This section includes the most common
accessories available for your lathe, which may
be available through your local South Bend
Lathe Co. dealer. If you do not have a dealer in
your area, please call us at [phone] or
email us at [e-mail].

SB1279—10 Pc. Precision 5–C Collet Set

Set of 10 collets sized from
as the individual collets, only packaged in one
convenient set.

1

⁄8" - 3⁄4". Same quality

SB1298—SBL Bench Lathe Shop Clock
SB1299—SBL Toolroom Lathe Shop Clock
SB1300—SBL Lathe with Man

These fine traditional shop clocks are constructed
with a metal antique-finished frame. They are
easy to read from a distance and measure 14"
in diameter. Pictures just don't do them justice.
They are very nice quality clocks and perfect for
the South Bend Lathe aficionado.

SB1298 SB1299

SB1300

Figure 92. Model SB1279 10 Pc. 5-C Collet Set.

SB1272—Collect Attachment

This collet attachment takes advantage of the
South Bend factory-made collet port in the lathe
gear cover. This accessory installs easily on
these South Bend Lathes without having
to modify the gear cover. The Model SB1272 is
capable of delivering years of trouble-free service.
It is manufactured with the same high-quality
workmanship, materials, and tolerances South
Bend machinery is known for.

Figure 94. Antique-finished South Bend shop clocks.

SB1271—Taper Attachment

This taper attachment mounts quickly to the
back bedway of your lathe. Accurate tapers of
up to 12" can be produced without repositioning
the attachment, having to offset the tailstock,
or disengaging the cross slide nut. The Model
SB1271 features scales at both ends, reading
inches-per-foot and degrees. An angle adjusting
knob with fine threads achieves exacting control
when setting tapers.

Figure 93. Model SB1272 Collect Attachment

Figure 95. Model SB1271 Taper Attachment.

-65-

Turn-Nado® Gearhead Lathes

OFF

MAINTENANCE

For Machines Mfg. Since 2/14

MAINTENANCE

Maintenance Schedule

Always disconnect power
to the machine before
performing maintenance.
Failure to do this may
result in electrocution or
accidental startup injury.

For optimum performance from this machine,
this maintenance schedule must be strictly
followed. We strongly recommend all operators
make a habit of following the daily maintenance
procedures. Use the chart provided on Page 67
to ensure this is done.

Ongoing

The condition of machine components should be
carefully observed at all times to minimize the
risk of injury or machine damage. If any of the
conditions below are observed, stop the lathe
immediately, disconnect power, and correct the
condition before resuming operations:

• Loose mounting bolts or fasteners.

• Worn, frayed, cracked, or damaged wires.

• Guards removed.

• STOP button not working correctly or not
requiring you to reset it before starting the
machine again.

• A reduction in braking speed or efficiency.

• Oil level not visible in the sight glasses.

• Coolant not flowing out.

• Damaged or malfunctioning components.

Daily, Before Operations

• Check/add headstock oil (Page 68).

• Check/add gearbox oil (Page 69).

• Check/add apron oil (Page 70).

• Check/add coolant (Page 74).

• Lubricate the ways (Page 71).

• Add oil to the ball oilers (Page 72).

• Clean/lubricate the leadscrew (Page 72).

• Disengage the feed control lever on the apron
(to prevent crashes upon startup).

• Ensure carriage lock bolt is loose.

Daily, After Operations

• Depress STOP button and shut OFF the
master power switch (to prevent accidental
startup).

• Vacuum/clean all chips and swarf from bed,
slides, and chip drawer.

• Wipe down all unpainted or machined
surfaces with an oiled rag.

Monthly

• Drain and clean the coolant tank, then add
new fluid (Page 74).

Annually

• Change the headstock oil (Page 68).

• Change the apron oil (Page 70).

• Change the gearbox oil (Page 69).

• Lubricate end gears (Page 73).

• Check/level bedway (Page 28).

Cleaning & Protecting

Regular cleaning is one of the most important
steps in taking care of this lathe. We recommend
that the cleaning routine be planned into the
workflow schedule, so that adequate time is set
aside to do the job right.

Typically, the easiest way to clean swarf from
the bed ways and chip drawer is to use a wet/dry
shop vacuum that is dedicated for this purpose.
The small chips left over after vacuuming can be
wiped up with a slightly oiled rag. Avoid using
compressed air to blow off chips, as it may drive
them deeper into moving surfaces and could
cause sharp chips to fly into your face or hands.

Besides the ways, all other unpainted and
machined surfaces should be wiped down daily
to keep them rust-free and in top condition. This
includes any surface that is vulnerable to rust
if left unprotected (especially any parts that are
exposed to water-soluble coolant). Typically,
a thin film of oil is all that is necessary for
protection.

-66-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

MAINTENANCE

Maintenance Chart

www.southbendlathe.com

[phone] • FAX: [phone]

Lathe Monthly Maintenance Chart

®

Service Item

Change Gearbox Oil

Change Headstock Oil

Change Apron Oil

Change Coolant

South Bend Lathe Co.

Refer to the coolant manufacture's instructions for more information regarding coolant condition, replacement, dis-

posal, and safety.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Day

Annual Service

Item

Lubrication

Ways

Ball Oilers

Leadscrew

Unpainted

Surfaces

Inspection

Headstock

Oil Level

Gearbox

Oil Level

Apron Oil

Level

Coolant

Level

Coolant

Condition

Use this chart to keep track of the maintenance performed on your South Bend Lathe. Cross out or initial the “Day” box for each item on the list.

If the box is blacked out, maintenance is not required for that item on that day. Use the maintenance poster included with your South Bend Lathe

as a quick reference guide when performing the maintenance items.

Date of last annual service:

Once every year, or more often with heavy use,

perform these service items. Keep track of when you

last performed your annual service and when you’ll

need to perform it again.

Date of next annual service:

Make copies of this page to use each month. Keep each chart as a maintenance record for your South Bend Lathe.

-67-

Turn-Nado® Gearhead Lathes

!

MAINTENANCE

For Machines Mfg. Since 2/14

Lubrication

Headstock

The headstock is supplied with oil from the oil
tank in the base of the left stand.

When the spindle motor is started, a belt-driven
oil pump circulates oil across the headstock gears
before spindle rotation is started.

Checking & Adding Oil

Oil Type...Mobil DTE Light or ISO 32 Equivalent

Oil Amount .......................................... 15.9 Quarts

Check/Add Frequency .................................... Daily

Change Frequency ...................................Annually

Remove the end gear cover and the side access
panel from the left stand, then unthread the oil
fill cap to check the oil level on the dip stick (see
Figure 29).

Oil Dip Stick

Changing Headstock Oil

The headstock oil must be changed after the
break-in period and then annually (or every six
months with heavy service or extreme working
conditions).

Since this lathe uses a base-mounted oil tank,
removing the drain plug and using a drain pan
is not a convenient option when changing the oil.
Alternately, we recommend using a remote oil
pump with a suction hose that can be inserted
through the filler spout to the bottom of the oil
tank.

If a remote oil pump system is not available,
use the headstock oil pump for this purpose, as
instructed below.

Items Needed: Qty

5-Gallon Waste Oil Bucket with Lid .................... 1

Adjustable Wrench ................................................1

Hex Wrench 4mm .................................................1

Mineral Spirits ...................................... As Needed

Shop Rags .............................................. As Needed

Low-Profile Catch Pan .......................................... 1

Pipe Tape or Sealant ............................. As Needed

Oil Fill

Spout

Figure 96. Checking headstock oil tank level.

If the oil on the dip stick is less than 3" from the
tip of the stick, add oil.

To drain the headstock oil tank:

1. DISCONNECT LATHE FROM POWER!

2. Remove the end gear cover and the side

access panel from the left stand.

3. Disconnect the headstock oil supply hose see
(Figure 97) from the headstock and point it
into the waste bucket.

Oil Supply

Hose

Figure 97. Headstock oil supply hose.

-68-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

MAINTENANCE

4. Staying well away from the V-belts, re-

connect the lathe to power and press the
spindle motor ON button—DO NOT start
spindle rotation!

This will pump oil from the tank into the

bucket.

5. When oil stops flowing out of the supply

hose, immediately press the spindle motor
OFF button and disconnect the lathe from
power.

6. Place the low-profile catch pan under the

drain plug shown in Figure 98, then remove
the drain plug and let the remaining oil flow
from the tank.

Quick-Change Gearbox

Oil Type ...... Mobil Vactra 2 or ISO 68 Equivalent

Oil Amount ............................................ 3.2 Quarts

Check/Add Frequency .................................... Daily

Change Frequency ...................................Annually

Checking Oil Level

The quick-change gearbox has the proper amount
of oil when the sight glass shown in Figure 99 is
halfway full.

Drain

Plug

Figure 98. Headstock oil drain plug.

7. Re-install the drain plug and re-connect the

oil supply hose to the headstock connection.

Note: Use pipe tape or sealant to ensure the

connections do not leak.

8. Clean away any spilled oil with shop rags

and mineral spirits.

9. Dispose or recycle the old oil according to

federal, state, and local requirements.

Gearbox Oil

Sight Glass

Figure 99. Location of quick-change gearbox oil sight

glass.

Adding Oil

Remove the quick-change gearbox fill plug (see
Figure 100), then add oil until the level is
approximately halfway in the gearbox oil sight
glass.

Fill

Plug

Drain

Plug

10. Add oil as previously instructed, then re-

install the end gear cover and side access
panel before re-connecting the lathe to
power.

Figure 100. Locations of the quick-change gearbox fill

and drain plugs.

-69-

Turn-Nado® Gearhead Lathes

MAINTENANCE

For Machines Mfg. Since 2/14

Draining Oil

Place a catch pan under the quick-change
gearbox drain plug (see Figure 100), loosen the
fill plug and remove the drain plug, then allow
the gearbox reservoir to empty.

Apron

Oil Type ...... Mobil Vactra 2 or ISO 68 Equivalent

Oil Amount ............................................ 2.1 Quarts

Check/Add Frequency .................................... Daily

Change Frequency ...................................Annually

Checking Oil Level

The apron has the proper amount of oil when the
sight glass shown in Figure 101 is halfway full.

Important: Keep in mind that the apron one­shot oiler draws the oil from the apron reservoir.
Check this oil level often when using the one­shot oiler.

Draining Oil & Flushing Reservoir

Since the apron oil reservoir supplies the one­shot oiler, the oil is constantly being refreshed
when the reservoir is filled. However, small
metal particles may accumulate at the bottom of
the reservoir with normal use. Therefore, to keep
the reservoir clean, drain and flush it at least
once a year.

Place a catch pan under the apron drain plug
shown in Figure 102, loosen the fill plug, then
use a 6mm hex wrench to remove the drain plug
and empty the reservoir.

One-Shot

Oiler

Fill Plug

Sight

Glass

Figure 101. Location of apron oil sight glass.

Adding Oil

Remove the twist-off fill plug shown in Figure
101, and add oil until the sight glass is halfway

full.

Drain Plug

Figure 102. Location of apron drain plug.

Flush the reservoir by pouring a small amount of
clean oil into the fill hole and allowing it to drain
out the bottom.

Replace the drain plug and add oil as previously
described.

-70-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

MAINTENANCE

One-Shot Oiler

The one-shot oiler shown in Figure 103
lubricates the saddle ways with oil from the
apron reservoir.

To use the one-shot oiler, pull the pump knob out
for two or three seconds and then push it in. The
pump draws oil from the apron reservoir and
then forces it through drilled passages to the way
guides.

Repeat this process while moving the carriage
and cross slide through their full range of
movement to distribute oil along the ways.

Lubricate the guides before and after operating
the lathe. If the lathe is in a moist or dirty
environment, increase the lubrication interval.

Check the apron oil level through the sight glass
before using the one-shot oiler to ensure the
proper oil level.

One-Shot

Oiler

Figure 103. Location of one-shot oiler on the apron.

-71-

Turn-Nado® Gearhead Lathes

MAINTENANCE

Longitudinal Leadscrew

Oil Type ...... Mobil Vactra 2 or ISO 68 Equivalent

Oil Amount ............................................ As Needed

Lubrication Frequency ...................................Daily

Before lubricating the leadscrew, clean it first
with mineral spirits. A stiff brush works well to
help clean out the threads. Make sure to move
the carriage out of the way, so you can clean the
entire length of the leadscrew.

Apply a thin coat of oil along the length of the
leadscrew. Use a stiff brush to make sure the oil
is applied evenly and down into the threads.

Note: In some environments, abrasive material
can become caught in the leadscrew lubricant
and drawn into the half nut. In this case,
lubricate the leadscrew with a quality dry
lubricant.

Compound Rest

Leadscrew & Nut

Figure 104. Carriage ball oilers.

Quill Barrel

For Machines Mfg. Since 2/14

Cross Slide

Leadscrew

& Nut

Quill Leadscrew

& Nut

Ball Oilers

Oil Type ...... Mobil Vactra 2 or ISO 68 Equivalent

Oil Amount .......................................... As required

Pump Oil Can w/Plastic or Rubber Cone Tip ...... 1

Lubrication Frequency .........Before and After Use

Proper lubrication of ball oilers is done with
a pump-type oil can that has a plastic or
rubberized cone tip. We do not recommend using
metal needle or lance tips, as they can push the
ball too far into the oiler, break the spring seat,
and lodge the ball in the oil galley.

Lubricate the ball oilers before and after machine
use, and more frequently under heavy use. When
lubricating ball oilers, first clean the outside
surface to remove any dust or grime. Push the
rubber or plastic tip of the oil can nozzle against
the ball oiler to create a hydraulic seal, then
pump the oil can once or twice. If you see sludge
and contaminants coming out of the lubrication
area, keep pumping the oil can until the oil runs
clear. When finished, wipe away any excess oil.

Figure 105. Tailstock ball oilers.

Leadscrew &

Feed Rod

End Bearings

Figure 106. Leadscrew end bearing.

Refer to Figures 104–106 to identify the
locations of each oil device.

-72-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

MAINTENANCE

End Gears

Grease Type ............................................... NLGI#2

Frequency ................ Annually or When Changing

The end gears, shown in Figure 107, should
always have a thin coat of heavy grease to
minimize corrosion, noise, and wear. Wipe away
excess grease that could be thrown onto the
V-belts and reduce optimal power transmission
from the motor.

Figure 107. End gears.

Handling & Care

Make sure to clean and lubricate any gears
you install or change. Be very careful during
handling and storage—the grease coating on the
gears will easily pickup dirt or debris, which can
then spread to the other gears and increase the
rate of wear.

Lubricating

1. DISCONNECT LATHE FROM POWER!

2. Remove the end gear cover and all the end

gears shown in Figure 107.

3. Clean the end gears thoroughly with mineral
spirits to remove the old grease. Use a small
brush if necessary to clean between the
teeth.

4. Clean the shafts, and wipe away any grease
splatters in the vicinity and on the inside of
the end gear cover.

5. Using a clean brush, apply a thin layer of
grease on the gears. Make sure to get grease
between the gear teeth, but do not fill the
teeth valleys.

6. Install the end gears and mesh them
together with an approximate 0.002"
backlash. Once the gears are meshed
together, apply a small dab of grease
between them where they mesh together—
this grease will be distributed when the
gears rotate and re-coat any areas scraped
off during installation.

7. Re-install the end gear cover before re­connecting the lathe to power.

Make sure the end gear cover remains installed
whenever possible to keep the gears free of dust
or debris from the outside environment.

-73-

Turn-Nado® Gearhead Lathes

MAINTENANCE

Coolant System
Service

The coolant system consists of a fluid tank,
pump, and flexible nozzle. The pump pulls fluid
from the tank and sends it to the valve, which
controls the flow of coolant to the nozzle. As the
fluid leaves the work area, it drains back into
the tank through the chip drawer and catch tray
where the swarf is screened out.

For Machines Mfg. Since 2/14

Although most swarf from machining operations
is screened out of the coolant before it returns
to the tank, small particles will accumulate in
the bottom of the tank in the form of sludge. To
prevent this sludge from being pulled into the
pump and damaging it, the pump’s suction tube
is positioned a couple inches from the bottom
of the tank and fitted with a fine screen. This
works well when the tank is regularly cleaned;
however, if too much sludge is allowed to
accumulate before the tank is cleaned, the pump
will inevitably begin sucking it up.

Use Fig ures 108 –109 to identify the locations of
the coolant system controls and components.

Coolant

ON/OFF

Buttons

Figure 108. Coolant controls.

Coolant Pump

& Tank

Catch

Tray

Nozzle

& Valve

Lever

Chip Drawer

Hazards

As coolants ages and gets used, dangerous
microbes can proliferate and create a biological
hazard. The risk of exposure to this hazard can
be greatly reduced by replacing the old fluid
on a monthly basis, or as indicated by the fluid
manufacturer.

The important thing to keep in mind when
working with the coolant is to minimize exposure
to your skin, eyes, and lungs by wearing the
proper PPE (Personal Protective Equipment),
such as splash-resistant safety goggles, long­sleeve waterproof gloves, protective clothing, and
a NIOSH approved respirator.

BIOLOGICAL & POISON

HAZARD!
Use the correct personal
protection equipment when
handling coolant. Follow
federal, state, and fluid
manufacturer requirements
for proper disposal.

Figure 109. Additional coolant components.

-74 -

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

MAINTENANCE

Adding Fluid

1. DISCONNECT LATHE FROM POWER!

2. Remove the vented access cover from the

rear of the right stand, then slide the tank
out, as shown in Figure 110.

Electrical

Conduit

Pump

Tank

Fluid
Hose

Figure 110. Coolant tank and pump.

3. Pour coolant into the tank until it is nearly

full.

To change the coolant:

1. Position the coolant nozzle over the back of

the backsplash so that it is pointing behind
the lathe.

2. Place the 5-gallon bucket behind the lathe

and under the coolant nozzle. If you are
using the optional hose, connect it to the
nozzle and place it in the bucket. Otherwise,
you may need to have another person hold
the bucket up to the nozzle to prevent
coolant from splashing out.

3. Turn the coolant pump ON and pump the

old fluid out of the reservoir. Turn the pump
OFF immediately after the fluid stops
flowing.

Running the coolant pump without adequate
fluid in the tank may permanently damage it,
which will not be covered under warranty.

4. DISCONNECT LATHE FROM POWER!

4. Slide the tank back into the cabinet and

replace the access cover.

Changing Coolant

When you replace the old coolant, take the time
to thoroughly clean out the chip drawer, catch
tray, and fluid tank. The entire job only takes
about a
proper materials and tools. Make sure to dispose
of old fluid according to federal, state, and fluid
manufacturer's requirements.

Items Needed: Qty

Safety Wear .................. See Hazards on Page 74

New Coolant ........................................ 25.4 Quarts

Empty 5-Gallon Bucket w/Lid .............................. 2

Phillips Screwdriver #2 ........................................1

Wrench

Disposable Shop Rags ........................... As Needed

Hose or Tubing

Magnets (Optional) ............... As Many As Desired

1

⁄2 hour when you are prepared with the

3

⁄4" .............................................................1

5

⁄8" x 60" (Optional) ........... 1 Piece

5. Remove the vented access cover from the

rear of the right stand, then slide the tank
out.

6. To enable the remaining fluid to be poured

out in the next step, disconnect the fluid hose
from the pump (see Figure 110).

Note: The electrical conduit was purposely

left long, so the tank can be removed and
dumped out without disconnecting the wires
from the pump.

7. Pour the remaining coolant into the 5-gallon

bucket and close the lid.

8. Clean all the sludge out of the bottom of the

tank and then flush it clean. Use the second
bucket to hold the waste and make sure to
seal the lid closed when done.

Dispose of the old coolant and swarf

according to federal, state, and fluid
manufacturer's requirements.

-75-

Turn-Nado® Gearhead Lathes

MAINTENANCE

For Machines Mfg. Since 2/14

9. Slide the tank partially into the base and re-

connect the fluid hose.

Tip: Leave one or more magnets at the bottom

of the tank to collect metal chips and make
cleanup easier next time. This will also help
keep small metal chips out of the pump.

10. Refill the tank with new coolant, then slide it

completely into the base.

11. Replace the access cover panel.

12. Re-connect the lathe to power and point the

nozzle into the chip drawer.

13. Turn the master power switch ON, then

reset the STOP button.

14. Turn the coolant pump ON to verify that

fluid cycles properly, then turn it OFF.

Machine Storage

To prevent the development of rust and
corrosion, the lathe must be properly prepared
if it will be stored for a long period of time.
Doing this will ensure the lathe remains in good
condition for later use.

To prepare the lathe for storage:

1. Run the lathe and bring all gearboxes to

operating temperature, then drain and refill
them with clean oil.

2. Pump out the old coolant, then add a few

drops of way oil and blow out the lines with
compressed air.

4. Thoroughly clean all unpainted, bare metal

surfaces, then apply a liberal coat of way
oil, heavy grease, or rust preventative. Take
care to ensure these surfaces are completely
covered but that the rust preventative or
grease is kept off of painted surfaces.

5. Lubricate the machine as outlined in the

lubrication section. Be sure to use an oil can
to purge all ball oilers and oil passages with
fresh oil.

6. Loosen or remove the V-belts so they do not

become stretched during the storage period.
(Be sure to place a maintenance note near
the power button as a reminder that the
belts have been loosened or removed.)

7. Place a few moisture absorbing desiccant

packs inside of the electrical box.

8. Cover the lathe and place it in a dry area

that is out of direct sunlight and away from
hazardous fumes, paint, solvents, or gas.
Fumes and sunlight can bleach or discolor
paint and make the chuck guard cloudy.

9. Every few months, rotate by hand all gear-

driven components a few times in several
gear selections. This will keep the bearings,
bushings, gears, and shafts well lubricated
and protected from corrosion—especially
during the winter months.

Slide the carriage, micrometer stop,

tailstock, and steady rest down the lathe
bed to make sure that way spotting is not
beginning to occur.

3. DISCONNECT LATHE FROM POWER!

-76-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SERVICE

Backlash Adjustment

SERVICE

Cross Slide

Tools Needed: Qty

Backlash is the amount of free play felt while
changing rotation directions with the handwheel.
This can be adjusted on the compound rest
and cross slide leadscrews. Before beginning
any adjustment, make sure that all associated
components have been cleaned and lubricated.

Reducing backlash to less than 0.002" is
impractical and can lead to accelerated wear
of the wedge, nut, and leadscrew. Avoid the
temptation to overtighten the backlash set
screw while adjusting.

Hex Wrench 3mm .................................................1

Hex Wrench 5mm ................................................1

The cross slide backlash is adjusted by loosening
all four cap screws shown in Figure 112, then
tightening the center set screw. This will push
down on a wedge and force the leadscrew nut
apart, taking up lash between the nut and
leadscrew.

Cap Screws

Compound Rest

Tools Needed: Qty

Hex Wrench 3mm .................................................1

The compound rest backlash is adjusted by
tightening the set screws shown in Figure

111. When these screws are adjusted against
the leadscrew nut, they offset part of the nut to
remove play between the nut and leadscrew.

Set Screws

Figure 111. Compound rest backlash adjustment set

screws.

To adjust the backlash, rock the handwheel back
and forth, and tighten the screws slowly until
the backlash is approximately 0.002"–0.003", as
indicated on the graduated dial.

Set

Screw

Figure 112. Cross slide backlash adjustment screws.

To adjust the backlash, remove the compound
rest and loosen the four cap screws. Then, rock
the cross slide handwheel back and forth, and
tighten the set screw slowly until the backlash is
at approximately 0.002"–0.003" as indicated on
the graduated dial.

If you end up adjusting the nut too tight, loosen
the set screw, tap the cross slide a few times
with a rubber or wooden mallet, and turn the
handwheel slowly back and forth, until the
handle turns freely—then try again.

Remember to re-tighten the four cap screws
when you are finished.

If you end up adjusting the nut too tight, loosen
the set screws, tap the compound rest a few
times with a rubber or wooden mallet, and turn
the handwheel slowly back and forth until it
moves freely—then try again.

-77-

Turn-Nado® Gearhead Lathes

SERVICE

For Machines Mfg. Since 2/14

Leadscrew End Play
Adjustment

After a long period of time, you may find that
the leadscrew develops a small amount of end
play. This end play can be removed with an easy
adjustment.

Tools Needed: Qty

Open End Wrench 36mm or 1 7⁄16" ........................1

Hex Wrench 3mm .................................................1

To remove leadscrew end play:

1. DISCONNECT LATHE FROM POWER!

2. Loosen both retaining nut set screws (see

Figure 113).

Set Screw

(1 of 2)

Gib Adjustment

The goal of adjusting the gib screws is to remove
sloppiness or "play" from the ways without over­adjusting them to the point where they become
stiff and difficult to move.

In general, loose gibs cause poor finishes and
tool chatter; however, over-tightened gibs cause
premature wear and make it difficult to turn the
handwheels.

Important: Before adjusting the gibs, loosen the
locks for the device so that the gibs can freely
slide during adjustment, then lubricate the ways.

The gibs are tapered and held in position by a
screw at each end. To adjust the gib, turn one
screw
turn counterclockwise, so both screws move in
the same direction and the same amount. Test
the feel of the sliding component by turning
the handwheel, and adjust the gib screws as
necessary to make it tighter or looser.

1

⁄4 turn clockwise and the other screw 1⁄4

Leadscrew

Figure 113. Leadscrew end play adjustment.

3. Engage the half nut lever.

4. Rotate the carriage handwheel to move

the carriage back slightly, then tighten the
retaining nut at the same time until the end
play is removed.

5. Tighten both set screws to secure the setting.

Retaining

Nut

The gib adjustment process usually requires
some trial-and-error. Repeat the adjustment
process as necessary until you find the best
balance between loose and stiff movement. Most
machinists find that the ideal gib adjustment is
one where a small amount of drag or resistance
is present, yet the handwheels are still easy to
move.

-78-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SERVICE

Figures 114–118 show the location of the
adjustment screws for each gib on this machine.

Compound Rest

Gib Adjustment Screw

(1 of 2)

Cross Slide

Gib Adjustment Screw

(1 of 2)

Figure 114. Compound and cross slide gib adjustment

screws.

Note: Remove the thread dial body and the

carriage lock clamp to access the saddle gib
adjustment screw on the tailstock side (see
Figure 117).

Carriage

Lock

Clamp

Figure 117. Carriage lock clamp.

Note: Before adjusting the tailstock gib, loosen

the clamping hex bolts underneath both ends
of the tailstock (see Figure 118) to release the
clamping pressure between the upper and lower
castings. Test the gib adjustment by using the
offset adjustment screws. When you are satisfied
with the setting, retighten the clamping hex
bolts.

Saddle Rear

Gib Adjustment

Screw (1 of 2)

Figure 115. One of two rear saddle gib adjustment

screws.

Gib Adjustment

Screw (1 of 2)

Figure 116. Front saddle gib adjustment screw.

Offset Adjustment

Screw (1 of 2)

Gib Adjustment

Screw (1 of 2)

Clamping Hex

Bolt (1 of 2)

Figure 118. Tailstock gib adjustment controls.

-79-

Turn-Nado® Gearhead Lathes

SERVICE

For Machines Mfg. Since 2/14

Half Nut Adjustment

The clamping pressure of the half nut is fully
adjustable with a gib that can be loosened or
tightened by two set screws. Use this procedure
to adjust the half nut if it becomes loose from
wear, or it is too tight for your preferences. A
half nut that is too loose will make it difficult
to produce accurate work. A half nut that is too
tight will increase the rate of wear on itself and
the leadscrew.

Tool Needed: Qty

Hex Wrench 3mm .................................................1

To adjust the half nut:

1. Disengage the half nut, then remove the

thread dial.

2. Turn the two set screws (see Figure 119)

clockwise to tighten the half nut and
counterclockwise to loosen it.

V-Belts

V-belts stretch and wear with use, so check the
tension on a monthly basis to ensure optimal
power transmission. Replace all of the V-belts
as a matched set if any of them show signs of
glazing, fraying, or cracking.

Tools Needed: Qty

Phillips Screwdriver #2 ........................................1

Open End Wrench 24mm......................................1

To adjust the V-belts:

1. DISCONNECT LATHE FROM POWER!

2. Remove the motor access covers shown in

Figure 120.

Headstock

End

Make sure to turn the set screws in even

amounts so that one end of the gib does not
become tighter than the other.

Set

Screws

Figure 119. Half nut gib adjustment.

3. Engage/disengage the half nut several times

and notice how it feels. The half nut is
correctly adjusted when it has a slight drag
while opening and closing. The movement
should not be too stiff or too sloppy.

Access

Covers

Figure 120. Locations of motor access covers.

3. Adjust the hex nuts on the motor mount

bolts shown in Figure 121 to move the
motor mount plate up or down and adjust
the V-belt tension. When correctly tensioned,
each belt should have about
when pressed firmly (see Figure 121).

Motor Mount Bolts

3

⁄4" deflection

Pulley

Deflection

Pulley

4. Repeat Steps 2–3, if necessary, until you are

satisfied with the half nut pressure.

5. Re-install the thread dial.

-80-

Figure 121. V-belt adjustment.

4. Tighten the hex nuts against both sides of

the motor mount plate to prevent it from
moving out of adjustment during operation,
then re-install the access covers.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SERVICE

Spindle Clutch
Adjustment

This lathe uses a dual-clutch mechanism to drive
the spindle. The clutch assembly will need to
be adjusted if you have difficulty engaging the
forward or reverse spindle lever position or if the
chuck takes more than 3–4 seconds to reach full
speed when set at the highest spindle speed.

DISCONNECT LATHE FROM POWER before
performing this procedure. Failure to do so
could result in accidental startup, electrical
shock, entanglement or crushing injury, or
property damage.

DO NOT touch hot components. During use,
the clutch and other internal components can
become very hot. Wear heavy gloves or allow
components to cool before service.

Required for Procedure Qty

Wrench 4mm .........................................................1

Another Person .....................................................1

To adjust the spindle clutch:

1. DISCONNECT LATHE FROM POWER!

2. Move the spindle lever to the center (neutral)

position.

3. Have another person support the electrical

cabinet, then remove the three button-head
cap screws shown in Figure 122.

Wear safety glasses throughout the entire
procedure. Oil may splash and spring-loaded
components may be thrown, resulting in injury
or loss of vision.

DO NOT rotate the spindle or input pulley by
hand while hands or fingers are inside the
headstock. Doing so may cause entanglement
and serious crushing injuries.

Support components while their mounting
fasteners are being removed. Components may
fall or swing outward if they are not properly
supported, resulting in crushing or laceration
injuries.

Figure 122. Removing electrical cabinet fasteners.

4. Tilt the cabinet out enough to allow access to

the clutch access cover, being careful not to
strain the lamp or chuck guard safety switch
cords. If necessary, remove these components
to prevent straining them.

Rest the cabinet on a stable support.

5. Remove the clutch access panel from the rear

of the headstock to expose the dual-clutch
mechanism (see Figure 123).

Clutch Access

Panel

Figure 123. Spindle access panel.

-81-

Turn-Nado® Gearhead Lathes

!

6. Study Figure 124 to determine the

adjustments that will be required in the
following steps.

Forward Adjustment

Ring

Tighten

Loosen

Forward Drive

Clutch

Reverse Adjustment

Ring

Loosen

Tighten

Reverse Drive

Clutch

SERVICE

7. Use a metal scribe or permanent marker

to mark the position of the adjustment
ring relative to its clutch assembly, then
use a small screwdriver to pry and slide
the necessary adjustment ring away from
its corresponding clutch to unlock it (see
Figure 125).

For Machines Mfg. Since 2/14

Clutch components get hot
during operation. To avoid
burn injuries, wear heavy
leather gloves or allow
components to cool before
service.

Symptom Required Action

Spindle lever will not

engage FORWARD.

Spindle lever will not

engage REVERSE.

Chuck takes more

than 3–4 seconds to

reach full speed in

Loosen Forward

Adjustment Ring as

Loosen Reverse

Adjustment Ring as

Tighten Forward

Adjustment Ring one

FORWARD.

Chuck takes more

than 3–4 seconds to

reach full speed in

Tighten Reverse

Adjustment Ring one

REVERSE.

Figure 124. Clutch adjustment overview.

DO NOT rotate the spindle
or input pulley while any
body part is inside the
headstock. Doing so may
cause entanglement and
serious crushing injuries.

needed.

needed.

notch.

notch.

Adjustment Ring

Ring

Disengaged

(Teeth

Exposed

Beneath)

Figure 125. Disengaging adjustment ring

(reverse side shown).

If you have difficulty disengaging the ring,

make sure the spindle lever is in the middle
(neutral) position. When the ring is fully
disengaged, it will spin freely.

— If you are loosening the adjustment ring,

continue to Step 8.

— If you are tightening the adjustment ring,

skip to Step 9.

-82-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SERVICE

8. Loosen the appropriate adjustment ring one

notch, then remove your hand from inside
the headstock. Have an assistant try to
engage the troublesome lever position while
you manually rotate the input pulley on the
headstock. DO NOT rotate the pulley while
your hands are inside the headstock.

Tip: When rotating the adjustment ring, hold

the adjustment ring stationary and rotate the
input pulley to make the adjustment.

Continue loosening and testing until the

lever engages the troublesome position.
When you are satisfied with the loosened
setting, slide the adjustment ring towards
its clutch assembly to lock it in position (see

Figure 126). Skip to Step 10.

9. Tighten the adjustment ring one notch, then

slide the adjustment ring towards its clutch
assembly to lock it in position.

Tip: When rotating the adjustment ring, hold

the adjustment ring stationary and rotate the
input pulley to make the adjustment.

Do not attempt to over-tighten the clutch
to reduce spin-up time. 3-4 seconds is the
normal time required for the spindle to reach
full speed. Overtightening the clutch may
result in damage and improper lathe function.

10. Replace the clutch access cover, pivot the

electrical cabinet back into position and
secure it with the fasteners removed in Step

3. If you removed the chuck guard safety
switch or work lamp, replace them.

11. Re-connect the lathe to power, then check

the function of the lathe. Test on the highest
speed setting allowed for the chuck being
used. Use a 3-jaw chuck with no workpiece
mounted. The spindle should take no more
than 3–4 seconds to reach full speed. Repeat
the clutch adjustment procedure as needed.

Adjustment Ring

Ring

Engaged

(Slid over

teeth)

Figure 126. Engaging adjustment ring (reverse side

shown).

-83-

Turn-Nado® Gearhead Lathes

SERVICE

For Machines Mfg. Since 2/14

Leadscrew Shear Pin
Replacement

The leadscrew is secured to a connecting collar
that is part of the headstock drivetrain with
the use of a soft-metal shear pin. The shear pin
is designed to break and disengage the power
transfer to the leadscrew to help protect more
expensive lathe components in the case of a
carriage crash or the lathe is overloaded.

Contact South Bend to order a replacement shear
pin (Part Number PSB10160927) or use the
specifications in Figure 127 to fabricate your
own.

10.54mm

8.75mm

5.8mm

3.74mm

To replace the shear pin:

1. DISCONNECT LATHE FROM POWER!

2. Clean debris and grime from the shear pin

area (see Figure 128).

Location of

Shear Pin

Figure 128. Location of shear pin.

3. Rotate the shroud washer on the leadscrew

(see Figure 129) so that the cutout lines up
with the shear pin head.

0.5mm

0.2mm0.2mm

NOTE: Shear Pin Material = S45C (SAE 1045)

Figure 127. Shear pin specifications.

Tools Needed: Qty

External Retaining Ring Pliers #1 ....................... 1

Magnet ................................................................... 1

Safety Goggles ....................................................... 1

Blow Gun w/Compressed Air ................................1

Light Machine Oil .................................. As needed

Shear Pin

Head

Cutout

Figure 129. Shroud washer and shear pin alignment.

4. Put on safety glasses.

If you fabricate your own shear pin, make sure
to use the material and dimensions specified
in Figure 127. Otherwise, the shear pin may
not provide the intended protection and lathe
damage could result.

Shroud
Washer

-84-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SERVICE

5. Move the retaining ring shown in Figure

130 away from the shroud washer, then

move the shroud washer away from the
shear pin and against the retaining ring.
This will create room for you to remove the
shear pin.

Retaining Ring

Figure 130. Shear pin access.

6. Use the magnet to remove the shear pin

head.

8. Put on safety goggles, insert the blow gun tip

into the shear pin hole and blow out the hole
with compressed air.

9. Put a drop of oil in the hole, then insert the

new shear pin into the bore, as shown in
Figure 132.

Note: If the pin does not freely slide into the

bore, DO NOT use a hammer on the pin or
you may permanently damage the shear
mechanism and bore, which would make
it nearly impossible to remove if it breaks
again. Instead, take the time to carefully
line up the two bores so it slides in easily.
Chamfer the end of the pin if necessary to
make it easier to insert.

Shear Pin

7. Rotate the lathe spindle to line up the inner

and outer bores, as shown in Figure 131,
and use the magnet to remove the other half
of the broken shear pin.

Inner Bore

Outer Bore

Figure 131. Shear pin bores aligned.

Figure 132. New shear pin installed in bore.

10. With the pin completely seated in the bore

and the head flush with the leadscrew
shoulder, slide the shroud washer against
the shoulder, then rotate the washer 180° to
completely cover the head of the shear pin,
as shown in Figure 133.

Rotate

Washer

Slot 180°

Figure 133. Shroud washer positioning.

-85-

Turn-Nado® Gearhead Lathes

SERVICE

For Machines Mfg. Since 2/14

11. Return the retaining ring against the shroud

washer and position the retaining ring
ears over the shear pin head, as shown in
Figure 134. This will prevent the shear pin
from falling out if the shroud washer should
rotate during operation.

Figure 134. Retaining ring positioned with ears in

front of pin access groove.

Tools Needed: Qty

Hex Wrenches 6mm .............................................. 1

Hex Wrench 8mm .................................................1

Wrench 17mm .......................................................1

Dead Blow Hammer .............................................. 1

Gap Removal

1. Remove the four gap-bed cap screws, shown

in Figure 136.

Dowel Pin

Jack Nut

Gap-Bed

Cap Screw

Way End

Cap Screw

Figure 136. Fasteners holding gap in place.

Gap Insert Removal &
Installation

The gap insert directly under the spindle (see
Figure 135) can be removed to create additional
space for turning large diameter parts.

The gap insert was installed, then ground flush
with the bed at the factory to ensure a precision
fit and alignment. Therefore, if the gap insert is
removed, it may be difficult to re-install with the
same degree of accuracy.

2. Remove the two way-end cap screws.

3. Tighten the two dowel-pin jack nuts until the

pins are pulled free from the gap insert.

4. Tap the outside of the gap insert with a dead

blow hammer to loosen it, then remove it.

-86-

Gap Insert

Figure 135. Gap insert.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

SERVICE

Gap Installation

1. Use mineral spirits and a clean lint-free rag

to clean the mating surfaces of the gap, bed,
and ways. If necessary, stone the mating
surfaces to remove scratches, dings, or burrs.

2. Wipe a thin layer of light machine oil on the

mating surfaces.

3. Place the gap insert into the gap and use a

dead-blow hammer to align the insert with
the lathe bed.

4. Back off the dowel pin jack nuts, and lightly

tap the dowel pins back into their respective
holes until they are seated. This process will
further help align the gap insert and bed
mating surfaces.

5. Install all fasteners and lightly snug them in

place.

6. Mount a dial indicator with a magnetic base

to the top of the saddle to indicate alignment.

7. First test the peak of the two prisms of the

gap insert that the saddle rides on, then test
the flanks of the prisms.

8. Tighten the gap bed cap screws in an

alternating manner and tap the side of the
gap insert into alignment.

9. Inspect the gap alignment 24 hours later

to make sure the gap is still aligned. If
necessary, loosen the gap bed cap screws and
repeat Steps 7–8 until the insert is properly
aligned.

-87-

Turn-Nado® Gearhead Lathes

TROUBLESHOOTING

TROUBLESHOOTING

For Machines Mfg. Since 2/14

If you need replacement parts, or if you are unsure how to do any of the solutions given here, feel free
to call us at [phone].

Symptom Possible Cause Possible Solution

Machine does not
start or a circuit
breaker trips.

1.

(First time operation only) Lathe is
wired out of phase.

2.

STOP button is engaged or at fault.

3.

Spindle switch(es) are at fault.

4.

Power supply is switched OFF at
master power switch or breaker.

5.

Wall fuse/circuit breaker is blown/
tripped; short in electrical system;
start-up load too high for circuit.

6.

Fuse has blown in machine
electrical box.

7.

One or more safety switches or
brake switch are engaged.

8.

Thermal overload relay has tripped.

9.

Safety/brake switch(es) at fault.

10.

Contactor not getting energized/has
burned contacts.

11.

Wiring is open/has high resistance.

12.

Motor is at fault.

1.

Correct out-of-phase wiring (refer to Page 92 for
details).

2.

Rotate button clockwise until it pops out to reset it
for operation; replace if not working properly.

3.

Replace bad switch(es).

4.

Make sure master power switch and circuit breaker
are turned ON.

5.

Verify circuit is rated for machine amp load;
troubleshoot and repair cause of overload; replace
weak breaker; find/repair electrical short.

6.

Replace fuse; determine if overload is due to heavy
operation; ensure power source has high enough
voltage and power cord is correctly sized.

7.

Verify electrical box door, chuck guard, spindle, and
brake switches are not engaged.

8.

Turn the thermal relay cut-out dial to increase
working amps and push the reset pin. Replace if
tripped multiple times (weak relay).

10.

Test all switches and replace as necessary.

11.

Test for power on all legs and contactor operation.
Replace unit if faulty.

12.

Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.

13.

Test/repair/replace.

Loud, repetitious
noise coming from
lathe at or near the
motor.

Motor overheats.

Motor is loud when
cutting, or bogs
down under load.

1.

Pulley set screws or keys are
missing or loose.

2.

Motor fan is hitting the cover.

1.

Motor overloaded.

1.

Excessive depth of cut or feed rate.

2.

Spindle speed or feed rate wrong for
cutting operation.

3.

Cutting tool is dull.

1.

Inspect keys and set screws. Replace or tighten if
necessary.

2.

Tighten fan, shim cover, or replace items.

1.

Reduce load on motor.

1.

Decrease depth of cut or feed rate.

2.

Refer to the feeds and speeds charts in
Machinery's Handbook or a speeds and feeds
calculator on the internet.

3.

Sharpen or replace the cutting tool.

-88-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

TROUBLESHOOTING

Symptom Possible Cause Possible Solution

Entire machine
vibrates upon
startup and while
running.

Bad surface finish.

1.

Workpiece is unbalanced.

2.

Workpiece is hitting stationary
object.

3.

Loose or damaged V-belt(s).

4.

V-belt pulleys are not properly
aligned.

5.

Chuck or faceplate is unbalanced.

6.

Gears not aligned in headstock or
no backlash.

7.

Broken gear or bad bearing.

8.

Spindle bearings at fault.

1.

Wrong spindle speed or feed rate.

2.

Dull tooling or poor tool selection.

3.

Tool height not at spindle
centerline.

4.

Too much play in gibs.

1.

Re-install workpiece as centered with the spindle
bore as possible.

2.

Stop lathe immediately and correct interference
problem.

3.

Re-tension/replace the V-belt(s) as necessary (see
Page 80).

4.

Align the V-belt pulleys.

5.

Re-balance chuck or faceplate; contact a local
machine shop for help.

6.

Adjust gears and establish backlash.

7.

Replace broken gear or bearing.

8.

Reset spindle bearing preload or replace worn
spindle bearings.

1.

Adjust for appropriate spindle speed and feed rate.

2.

Sharpen tooling or select a better tool for the
intended operation.

3.

Adjust tool height to spindle centerline (see Page

51).

4.

Tighten gibs (see Page 78).

Tapered tool
difficult to remove
from tailstock quill.

Cross slide,
compound, or
carriage feed has
sloppy operation.

Cross slide,
compound, or
carriage feed
handwheel is hard
to move.

Cutting tool
or machine
components vibrate
excessively during
cutting.

1.

Quill is not retracted all the way
back into the tailstock.

2.

Contaminants not removed from
taper before inserting into quill.

1.

Gibs are out of adjustment.

2.

Handwheel is loose or backlash is
high.

3.

Leadscrew mechanism worn or out
of adjustment.

4.

Ways are loaded with grime or
chips.

1.

Dovetail slides loaded with
shavings, dust, or grime.

2.

Gib screws are too tight.

3.

Backlash setting too tight (cross
slide only).

4.

Bedways are dry.

1.

Tool holder not tight enough.

2.

Cutting tool sticks too far out of tool
holder; lack of support.

3.

Gibs are out of adjustment.

4.

Dull cutting tool.

5.

Incorrect spindle speed or feed rate.

1.

Turn the tailstock handwheel until it forces the
tapered tool out of quill.

2.

Clean the taper and bore and re-install tapered tool.

1.

Adjust gib screw(s) (see Page 78).

2.

Tighten handwheel fasteners, adjust handwheel
backlash to a minimum (see Page 77).

3.

Adjust leadscrew to remove end play (see Page 78).

4.

Clean the ways and re-lubricate.

1.

Remove gibs, clean ways/dovetails, lubricate, and
re-adjust gibs.

2.

Loosen gib screw(s) slightly (see Page 78).

3.

Slightly loosen backlash setting (see Page 78).

4.

Lubricate bedways and handles.

1.

Check for debris, clean, and retighten.

2.

Re-install cutting tool so no more than
length is sticking out of tool holder.

3.

Adjust gib screws at affected component (see Page

78)

4.

Replace or resharpen cutting tool.

5.

Use the recommended spindle speed.

1

⁄3 of the total

-89-

Turn-Nado® Gearhead Lathes

TROUBLESHOOTING

For Machines Mfg. Since 2/14

Symptom Possible Cause Possible Solution

Workpiece is
tapered.

Chuck jaws will
not move or do not
move easily.

Carriage will not
feed or is hard to
move.

Gear change levers
will not shift into
position.

1.

Spindle and tailstock centerlines
are not properly aligned with each
other.

1.

Chips lodged in the jaws or scroll
plate.

1.

Gears are not all engaged.

2.

Carriage lock is tightened down.

3.

Loose screw on the feed handle.

4.

Chips have loaded up on bedways.

5.

Bedways are dry and in need of
lubrication.

6.

Micrometer stop is interfering.

7.

Gibs are too tight.

8.

Gears or shear pin broken.

1.

Gears not aligned inside headstock.

1.

Realign the tailstock to the headstock spindle bore
centerline (see Page 45).

1.

Remove jaws, clean and lubricate scroll plate, then
replace jaws.

1.

Adjust gear levers.

2.

Check to make sure the carriage lock bolt is fully
released.

3.

Tighten.

4.

Frequently clean away chips that load up during
turning operations.

5.

Lubricate bedways and handles.

6.

Check micrometer stop position and adjust it as
necessary (see Page 52).

7.

Loosen gib screw(s) slightly (see Page 78).

8.

Replace gears or shear pin (see Page 84).

1.

Rotate spindle by hand with light pressure on the
lever until gear falls into place.

Spindle clutch
takes more than
3–4 seconds to
engage.

Difficulty engaging
spindle lever.

1.

Spindle clutch mechanism is too
loose.

1.

(When new) Spindle clutch needs
break-in time.

2.

Spindle clutch is too tight.

1.

Adjust spindle clutch (see Page 81).

1.

Use moderate pressure to engage spindle lever until
it is broken-in.

2.

Adjust spindle clutch (see Page 81).

-90-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

Shock Hazard: It is extremely dangerous to

Wire Connections:

Modifications:

Motor Wiring:

junction box.

Circuit Requirements: Connecting the machine

power inverters store an electrical charge for

our Technical Support at [phone].

ELECTRICAL

ELECTRICAL

Electrical Safety Instructions

These pages are accurate at the time of printing. In the constant effort to improve, however, we may
make changes to the electrical systems of future machines. Study this section carefully. If you see
differences between your machine and what is shown in this section, call Technical Support at (360)
734-1540 for assistance BEFORE making any changes to the wiring on your machine.

perform electrical or wiring tasks while the
machine is connected to the power source.
Touching electrified parts will result in
personal injury including but not limited to
severe burns, electrocution, or death. For
your own safety, disconnect machine from
the power source before servicing electrical
components or performing any wiring tasks!

All connections must be
tight to prevent wires from loosening during
machine operation. Double-check all wires
disconnected or connected during any wiring
task to ensure tight connections.

Using aftermarket parts or
modifying the wiring beyond what is shown
in the diagram may lead to unpredictable
results, including serious injury or fire.

The motor wiring shown in these
diagrams is current at the time of printing,
but it may not match your machine. Always
use the wiring diagram inside the motor

to an improperly sized circuit will greatly
increase the risk of fire. To minimize
this risk, only connect the machine to a
power circuit that meets the minimum
requirements given in this manual.

Capacitors/Inverters: Some capacitors and

up to 10 minutes after being disconnected
from the power source. To reduce the risk of
being shocked, wait at least this long before
working on capacitors.

Wire/Component Damage: Damaged wires

or components increase the risk of serious
personal injury, fire, or machine damage. If
you notice that any wires or components are
damaged while performing a wiring task,
replace those wires or components before
completing the task.

Experiencing Difficulties: If you are

experiencing difficulties understanding the
information included in this section, contact

BLACK

BLUE

BROWN

NOTICE:

WIRING DIAGRAM COLOR KEY

BLUE
WHITE

GREEN

G R AY

The photos and diagrams included in this section are best viewed in color. You can
see them in color at www.southbendlathe.com.

RED

LIGHT
BLUE

ORANGE

PINK

PURPLE

TUR­QUIOSE

WHITE

YEL LOW
GREEN

YEL LOW

-91-

Turn-Nado® Gearhead Lathes

Hot

Hot

Hot

Ground

Correcting Phase

ELECTRICAL

For Machines Mfg. Since 2/14

Polarity

This sub-section is only provided for
troubleshooting. If you discover during the test
run that the lathe will not operate, or that the
spindle runs backwards, the lathe may be wired
out of phase.

Without the proper test equipment to determine
the phase of power source legs, wiring machinery
to 3-phase power may require trial-and-error.
Correcting this is simply a matter of reversing
the positions where two of the incoming power
source wires are connected.

To correct wiring that is out of phase:

1. Push the STOP button, turn the master

power switch to OFF, and disconnect the
machine from power.

2. Open the electrical box and swap any two

hot wires coming from the power supply, as
illustrated in Figure 137.

To Power

Supply

Swap any two

of these wires

L1

Figure 137. Swapping L1 and L2 power connections to

correct out-of-phase wiring.

MASTER

POWER SWITCH

L2

L3

3. Close and latch the electrical box, and

reconnect the machine to the power source.

-92-

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

ELECTRICAL

wiring overview

Wiring Overview

Power Supply

Connection

Page 99

Electrical
Cabinet, Page 95

Work Lamp

Page 99

Chuck Guard

Safety Switch

Page 99

End Gear Cover

Safety Switch

Page 99

Spindle Motor

Page 97

Coolant

Pump Motor

Page 97

Control Panel

Page 98

Digital Readout Unit

See Unit Manufacturer's

Owner's Manual

-93-

Turn-Nado® Gearhead Lathes

ELECTRICAL

Component Location Index

Work Lamp

Page 99

Coolant

Pump Motor

Page 97

For Machines Mfg. Since 2/14

visual index

Electrical

Cabinet

Page 95

Master Power

Switch

Page 95

Control Panel

Page 98

Chuck Guard

Safety Switch

Page 99

Spindle Motor

Page 97

End Gear Cover

Safety Switch

Page 99

-94-

Figure 138. Component location index.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

Ground

Ground

ELECTRICAL

box1

Electrical Cabinet

To Chuck Guard Safety Switch, Page 99

To Work Lamp, Page 99

L1

L1

1 3 5 7L1 L2 L3 L4

L2

Contactor

Allen Bradley

C23 400

2 4 6 8T1 T2 T3 T4

25

AMP

23

21

97 98 NCNO 95 96

2 T1 4 T2 6 T3

U

L1

L2

1

25A

1492 SP

1492 SP

2345612

6

A2

L3

OL Relay

AB193T

V

L3

1492 SP

L1

6

E

L2

R

3

S T

Master Power

Switch

4

L2

L3

L1

A1A1A2

L1

L3

L2

1 3 5 7L1 L2

2 4 6 8T1 T2 T3 T4

0.4

0.35

0.3

0.25

97 98 NCNO 95 96

Contactor

Allen Bradley

C09 400

AMP

OL Relay

AB193T

L3 L4

AB 193T

3

L3

7

5

3

3

3

2 T1 4 T2 6 T3

3

U1

V1

L3

W1

X

3

W

L1

0 220 380 400 415 440

Transformer

6A

L1

1492 SP

Suenn Liang

SP-TBSW-10140

0 24

XXX

0 220

E

T

S

R

Power Supply Connection

Page 99

L1

L2

L3

E

E

Spindle Motor

Page 97

U

V

E

E

U

U

V

E

Coolant

Pump Motor

Page 97

3

0

Fuse

4A 250V

Fuse

500MA 250V

V1

W

U1

W1

0

E

V

W

V1

U1

W

U1

V1

0

W1

E

3

3

1

A1

4 5

4

5

6 7

6

7

W1

E

End Gear

Cover Safety

Switch

Control

Panel

Page 98

Page 99

-95-

Turn-Nado® Gearhead Lathes

Electrical Box

ELECTRICAL

For Machines Mfg. Since 2/14

box photo

-96-

Figure 139. Electrical box.

For Machines Mfg. Since 2/14 Turn-Nado® Gearhead Lathes

ELECTRICAL

spindle and pump

motor

Spindle Motor

U5
U2

U

V5

V2

W5
W2

W6

U1

V

V6

W1

W

Spindle Motor

To Electrical
Box, Page 95

Coolant Pump

To Electrical
Box, Page 95

U6

V1

Junction Box

Gn

Ground

Figure 140. Spindle motor location.

1

U1

W1

V1

Gn

6

Ground

Coolant Pump

2

3

W1

5

4

V1

Coolant

Pump

Figure 141. Coolant pump location.

-97-

Turn-Nado® Gearhead Lathes

Headstock

COMMON

NC

NC

NO

NO

3

4

1

2

NC NO

Ground

0

1

A1

A1

Control Panel

ELECTRICAL

For Machines Mfg. Since 2/14

control panel
and motor

1

Emergency

Stop

Figure 142. Control panel wiring.

To Electrical

4 5

4

43

2

Motor

Start

43

12

6

Motor

Stop

2 1 2 1 2 1

4

3 3

5

Pump

Start

3

7

43

12

3

Pump

Stop

Power

Lamp

3

2 2 2 2

Box, Page 95

-98-