JET GH-1440B Operating Instructions and Parts Manual
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Operating Instructions and Parts Manual
Geared Head Bench Lathe 14x40 inch
Model GH-1440B
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-331440
Ph.: 800-274-6848 Edition 2 05/2019
www.jettools.com Copyright © 2017 JET
1
1.0 IMPORTANT SAFETY
INSTRUCTIONS
Read and understand the entire owner's
manual before attempting set-up or operation
of this lathe.
WARNING: To reduce risk of injury:
1. This machine is designed and intended for use
by properly trained and experienced personnel
only. If you are not familiar with the proper and
safe use of a lathe, do not use this machine
until proper training and knowledge have been
obtained.
2. Keep guards in place. Safety guards must be
kept in place and in working order.
3. Remove adjusting keys and wrenches. Before
turning on machine, check to see that any
adjusting wrenches are removed from the tool.
4. Reduce the risk of unintentional starting. Make
sure switch is in the OFF position before
plugging in the tool.
5. Do not force tools. Always use a tool at the
rate for which it was designed.
6. Use the right tool. Do not force a tool or
attachment to do a job for which it was not
designed.
7. Maintain tools with care. Keep tools sharp and
clean for best and safest performance. Follow
instructions for lubrication and changing
accessories.
8. Always disconnect the tool from the power
source before adjusting or servicing.
9. Check for damaged parts. Check for alignment
of moving parts, breakage of parts, mounting,
and any other condition that may affect the
tool’s operation. A guard or any part that is
damaged should be repaired or replaced.
10. Turn power off. Never leave a tool unattended.
Do not leave a tool until it comes to a complete
stop.
11. Keep work area clean. Cluttered areas and
benches invite accidents.
12. Keep work area well lighted.
13. Keep children and visitors away. All visitors
should be kept a safe distance from the work
area.
14. Make the workshop child proof. Use padlocks,
master switches, and remove starter keys.
15. Wear proper apparel. Loose clothing, gloves,
neckties, rings, bracelets, or other jewelry may
get caught in moving parts. Non-slip footwear
is recommended. Wear protective hair
covering to contain long hair. Do not wear any
type of glove.
16. Always wear ANSI Z87.1 approved safety
glasses or face shield while using this
machine. (Everyday eyeglasses only have
impact resistant lenses; they are not safety
glasses.)
17. Do not overreach. Keep proper footing and
balance at all times.
18. Do not place hands near the chuck or
workpiece while the machine is operating.
19. Do not perform any set-up work while machine
is operating.
20. Read and understand all warnings posted on
the machine.
21. This manual is intended to familiarize you with
the technical aspects of this lathe. It is not, nor
was it intended to be, a training manual.
22. Do not attempt to adjust or remove tools during
operation.
23. Never stop a rotating chuck or workpiece with
your hands.
24. Choose a low spindle speed when working
unbalanced workpieces, and for threading and
tapping operations.
25. Do not exceed the maximum speed of the
workholding device.
26. Do not exceed the clamping capacity of the
chuck.
27. Workpieces longer than 3 times the chucking
diameter must be supported by the tailstock or a
steady rest.
28. Avoid small chuck diameters with large turning
diameters.
29. Avoid short chucking lengths and small chucking
contact.
30. Turn off the machine and disconnect from power
before cleaning. Use a brush to remove shavings
or debris — do not use bare hands.
31. Do not stand on the machine. Serious injury
could occur if the machine tips over.
32. Never leave the machine running unattended.
Turn the power off and do not leave the machine
until moving parts come to a complete stop.
33. Remove loose items and unnecessary work
pieces from the area before starting the machine.
34. Do not operate the lathe in flammable or
explosive environments. Do not use in a damp
environment or expose to rain.
WARNING: This product can expose you to chemicals including lead and cadmium which are known to
the State of California to cause cancer, and phthalates which are known to the State of California to cause
birth defects or other reproductive harm. For more information go to http://www.p65warnings. ca.gov.
WARNING: Some dust, fumes and gases created by power sanding, sawing, grinding, drilling, welding
and other construction activities contain chemicals known to the State of California to cause cancer and
birth defects or other reproductive harm. Some examples of these chemicals are:
lead from lead based paint
crystalline silica from bricks, cement and other masonry products
arsenic and chromium from chemically treated lumber
Your risk of exposure varies, depending on how often you do this type of work. To reduce your exposure to
these chemicals, work in a well-ventilated area and work with approved safety equipment, such as dust
masks that are specifically designed to filter out microscopic particles. For more information go to
http://www.p65warnings.ca.gov/ and http://www. p65warnings.ca.gov/wood.
Familiarize yourself with the following safety notices used in this +manual:
This means that if precautions are not heeded, it may result in minor injury and/or possible
machine damage.
This means that if precautions are not heeded, it may result in serious, or possibly even fatal,
injury.
2.0 About this manual
This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model GH1440B Lathe. This manual contains instructions on installation, safety precautions, general operating
procedures, and maintenance instructions. Your machine has been designed and constructed to provide
consistent, long-term operation if used in accordance with the instructions as set forth in this document.
This manual is not intended to be a training guide for lathe operations, or tool and workpiece selection. Consult
a machinery handbook or shop supervisor for information on proper speed and feed rates for specific materials,
or type of cutter suitable for a particular operation. Whatever accepted methods or materials are used, always
make personal safety a priority.
Note: The Figures in this manual may or may not show your exact lathe model, but the procedures will be
identical.
If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our
web site: www.jettools.com.
Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.
Read and understand the entire contents of this manual before attempting assembly
or operation! Failure to comply may cause serious injury!
Register your product using the mail-in card provided, or register online: http://www.jettools.com/us/en/serviceand-support/warranty/registration/
3
3.0 Table of contents
Section Page
1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2
2.0 About this manual .......................................................................................................................................... 3
3.0 Table of contents ............................................................................................................................................ 4
4.0 Specifications ................................................................................................................................................. 6
5.0 Setup and assembly ....................................................................................................................................... 8
5.1 Shipping contents ....................................................................................................................................... 8
5.2 Uncrating and cleanup ............................................................................................................................... 9
5.3 Chuck preparation (three jaw) .................................................................................................................... 9
5.4 Chuck guard installation ........................................................................................................................... 10
6.0 Lubrication .................................................................................................................................................... 10
7.0 Electrical connections .................................................................................................................................. 11
7.1 GROUNDING INSTRUCTIONS ............................................................................................................... 11
7.2 Extension cords ........................................................................................................................................ 12
8.0 General description ...................................................................................................................................... 12
8.1 Lathe bed .................................................................................................................................................. 12
8.2 Carriage .................................................................................................................................................... 12
8.3 Headstock ................................................................................................................................................. 12
8.4 Quick change tool post ............................................................................................................................. 12
8.5 Apron ........................................................................................................................................................ 13
8.6 Tailstock ................................................................................................................................................... 13
8.7 Leadscrew and feed rod ........................................................................................................................... 13
8.8 Gear box ................................................................................................................................................... 13
8.9 Steady rest ............................................................................................................................................... 13
8.10 Follow rest .............................................................................................................................................. 13
9.0 Controls ........................................................................................................................................................ 13
10.0 Operation ................................................................................................................................................... 15
10.1 Break-in procedure ................................................................................................................................. 15
10.2 Feed and thread selection ...................................................................................................................... 15
10.3 Change gear replacement ...................................................................................................................... 15
10.4 Automatic feed operation and feed changes .......................................................................................... 15
10.5 Powered carriage travel ......................................................................................................................... 15
10.6 Thread cutting ........................................................................................................................................ 16
11.0 Adjustments ............................................................................................................................................... 16
11.1 Saddle adjustment .................................................................................................................................. 16
11.2 Cross slide adjustment ........................................................................................................................... 16
11.3 Compound slide adjustment ................................................................................................................... 16
11.4 Tailstock adjustment ............................................................................................................................... 16
11.5 Half nut gib adjustment ........................................................................................................................... 16
11.6 Headstock alignment .............................................................................................................................. 17
11.7 Removing gap bridge ............................................................................................................................. 17
11.8 Installing gap bridge ............................................................................................................................... 17
12.0 Thread and feed chart ................................................................................................................................ 18
13.0 Replacement parts ..................................................................................................................................... 18
13.1.1 Bed Assembly – Exploded View .......................................................................................................... 19
13.1.2 Bed Assembly – Parts List .................................................................................................................. 20
13.2.1 Headstock Assembly – Exploded View ............................................................................................... 22
13.2.2 Headstock Assembly – Parts List ........................................................................................................ 23
13.3.1 Headstock Controls – Exploded View ................................................................................................. 25
13.3.2 Headstock Controls – Parts List .......................................................................................................... 26
13.4.1 Stand and Brake Assembly – Exploded View ..................................................................................... 27
13.4.2 Stand and Brake Assembly – Parts List .............................................................................................. 28
13.5.1 Gear Box Assembly – Exploded View I ............................................................................................... 29
13.5.2 Gear Box Assembly – Exploded View II .............................................................................................. 30
13.5.3 Gear Box Assembly – Parts List .......................................................................................................... 31
13.6.1 Change Gears and Cover Assembly – Exploded View ....................................................................... 33
13.6.2 Change Gears and Cover Assembly – Parts List ................................................................................ 34
13.7.1 Apron Assembly – Exploded View ...................................................................................................... 35
13.7.2 Apron Assembly – Parts List ............................................................................................................... 36
13.8.1 Cross Slide Assembly – Exploded View .............................................................................................. 38
13.8.2 Cross Slide Assembly – Parts List ...................................................................................................... 39
13.9.1 Compound Rest Assembly – Exploded View ...................................................................................... 40
13.9.2 Compound Rest Assembly – Parts List ............................................................................................... 41
13.10.1 Tailstock Assembly – Exploded View ................................................................................................ 43
13.10.2 Tailstock Assembly – Parts List ......................................................................................................... 44
13.11.1 Coolant and Work Light – Exploded View ......................................................................................... 45
13.11.2 Coolant and Work Light – Parts List .................................................................................................. 46
13.12.1 Electrical Box Assembly – Exploded View ........................................................................................ 47
13.12.2 Electrical Box Assembly – Parts List ................................................................................................. 48
13.13.1 Steady Rest and Follow Rest – Parts List ......................................................................................... 49
13.13.2 Steady Rest and Follow Rest – Parts List ......................................................................................... 50
13.14.1 Chuck and Leadscrew Guards – Exploded View .............................................................................. 51
13.14.2 Chuck and Leadscrew Guards – Parts List ....................................................................................... 52
13.15.1 Accessories – Exploded View ........................................................................................................... 53
13.15.2 Accessories – Parts List .................................................................................................................... 54
14.0 Warranty and service ................................................................................................................................. 55
5
4.0 Specifications
Table 1
Model number
Stock number 331440
Motor and Electricals
Motor type TEFC induction
Horsepower 2.4 HP (1.8 kW)
Phase single
Voltage 230V only
Cycle 60 Hz
Listed FLA (full load amps) 15.3 A
Start capacitor 300MFD 350VAC
Run capacitor
Motor speed 1720 RPM
Power cord
Power plug installed n/a
Recommended circuit size 1 20 A
Sound emission without load 2 88 db
Coolant pump 230V/60Hz/1PH/0.2A/40W (1/18HP)
Capacities
Swing over bed 14 in. (355 mm)
Swing over cross slide 8 in. (203 mm)
Distance between centers 36-7/8 in. (936 mm)
Swing through gap 18 in. (457 mm)
Length of gap 8 in. (203 mm)
Steady rest capacity 5/16 – 2-15/16 in. (8 – 74.6 mm)
Follow rest capacity 2-3/16 in. (55.6 mm)
Headstock
Hole through spindle 2 in. (50.8 mm)
Spindle nose D1-5
Taper in spindle nose MT6
Spindle taper adaptor MT4
Spindle bearing type Tapered roller bearing
Number of spindle speeds 8
Range of spindle speeds 70-1900 RPM
Leadscrew 7/8 in. x 8 TPI
Feed rod diameter 3/4 in. (19 mm)
Gearbox
Number of longitudinal and cross feed rates 32/32
Range of longitudinal feeds 0.002 – 0.0548 in./rev
Range of cross feeds 0.007 – 0.0187 in./rev
Number of inch threads 34
Range of inch threads 4 – 56 TPI
Number of metric threads 26
Range of metric threads 0.4 – 7 mm
Compound and carriage
Tool post type Quick change
Maximum tool size 5/8 x 5/8 in. (15.88 mm)
Maximum compound slide travel 3-1/2 in. (88.9 mm)
Maximum cross slide travel 7 in. (177.8 mm)
Maximum carriage travel 37-2/5 in. (950 mm)
GH-1440B
40F 350VAC
3 x 2.08 mm²
6
Tailstock
Tailstock spindle travel 4 in. (101.6 mm)
Diameter of tailstock spindle 1-1/4 in. (31.8 mm)
Taper in tailstock spindle MT4
Main materials
Headstock Cast iron
Bed Cast iron
Apron/Saddle Cast iron
Tailstock Cast iron
Splash guard Steel
Stand Cast iron
Dimensions
Bed width 7-5/16 in. (186 mm)
Overall dimensions, L x W x H
76-2/5 x 29-15/16 x 59-4/5 in. (1940.5 x 759.5 x 1518.9 mm)
Shipping dimensions, L x W x H 66-5/16 x 29-15/16 x 59-7/8 in. (1940 x 760 x 1520 mm)
Weights
Net weight, approx. 1572 lb. (713 kg)
Shipping weight, approx. 1753 lb. (795.1 kg)
1
subject to local and national electrical codes.
2
The specified values are emission levels and are not necessarily to be seen as safe operating levels. As workplace
conditions vary, this information is intended to allow the user to make a better estimation of the hazards and risks
involved only.
L = length, W = width, H = height, TPI = threads per inch
n/a = not applicable
The specifications in this manual were current at time of publication, but because of our policy of continuous
improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring
obligations.
7
Read and understand the entire
contents of this manual before attempting set-up
or operation. Failure to comply may cause
serious injury!
5.0 Setup and assembly
5.1 Shipping contents
See Figure 5-1.
1 Lathe
1 Steady Rest (mounted on lathe)
1 Follow Rest (mounted on lathe)
1 8" Three Jaw Chuck (mounted on lathe)
1 8" Four Jaw Chuck (strapped to container)
1 10" Face Plate (strapped to container)
1 Tool Box # GH1440B-TBCP (strapped to container)
1 Chip Tray
1 Splash Guard
Tool Box (# GH1440B-TBCP) contents:
3 Open End Wrenches (10/12, 14/17, 17/19mm)
1 Oil Gun
1 Hex Key Set (2, 3, 4, 5, 6mm)
1 40T Gear
1 42T Gear
1 44T Gear
1 46T Gear
1 52T Gear
1 54T Gear
1 56T Gear
1 57T Gear
1 60T Gear
1 63T Gear
2 MT-4 Dead Centers
1 MT-4 Live Center
1 MT-4 to MT-6 Reducing Sleeve
1 Drift Key for Tailstock Sleeve
1 Cross Point Screwdriver
1 Flat Head Screwdriver
1 Quick Change Tool Holders
(250-202, 250-204, 250, 207, 250-210)
1 Key for 3-Jaw Chuck
1 Key for 4-Jaw Chuck & Cam Locks
1 Set of Reverse Jaws for 3-Jaw Chuck
1 Handle for Cross Slide Handwheel
1 Handle for Apron Handwheel
2 V-Belts (A-864)
6 Leveling Pads (with M14x50 Bolts & Washers)
1 Operation Instructions and Parts Manual
1 Packing List
1 Test Record
1 Product Registration Card
8
Figure 5-1
5.2 Uncrating and cleanup
mounting bolts. The lathe must be level to be
accurate.
Machine is heavy. Use an
appropriate lifting device and use extreme
caution when moving the machine to its final
location. Failure to comply may cause serious
injury.
1. Finish removing wooden crate from around
lathe.
2. Unbolt lathe from shipping pallet.
3. Choose a location for the lathe that is dry, has
good lighting, and has enough room to be able
to service the lathe on all four sides.
4. Move carriage and tailstock to the tailstock end
of the bed.
5. Place two steel rods or pipes of sufficient
strength into four holes (A, Figure 5-2) of lathe
stand. Sling the lathe with properly rated
straps. Do not lift by spindle. With adequate
lifting equipment, slowly raise lathe off
shipping pallet. Make sure lathe is balanced
before moving to sturdy bench or optional
stand.
5.3 Chuck preparation (three jaw)
Read and understand all
directions for chuck preparation. Failure to
comply may cause serious injury and/or
damage to the lathe.
Note: Before removing chuck from spindle, place
a way board across bedways under the chuck.
1. Support the chuck while turning three
camlocks 1/4 turn counter-clockwise with the
chuck key enclosed in the toolbox. Figure 5-3
shows the cam in the secure position. Line up
the two marks (A, Figure 5-3) for removal.
Figure 5-2
6. To avoid twisting the bed, the lathe's location
must be absolutely flat and level. Bolt lathe to
stand (if used). If using a bench, through-bolt
for best performance.
7. Clean all rust protected surfaces using a mild
commercial solvent, kerosene or diesel fuel.
Do not use paint thinner, gasoline, or lacquer
thinner, as these will damage painted
surfaces. Cover all cleaned surfaces with a
light film of Mobil DTE Oil Heavy Medium or
equivalent.
8. Remove end gear cover. Clean all
components of end gear assembly and coat all
gears with a heavy, non-slinging grease.
9. Using a machinist’s precision level on the
bedways, check to make sure lathe is level
side to side and front to back. If necessary,
loosen mounting bolts, shim, and retighten
Figure 5-3
2. Carefully remove chuck from spindle and place
on an adequate work surface.
3. Inspect the camlock studs. Make sure they
have not become cracked or broken during
transit. Clean all parts thoroughly with solvent.
Also clean spindle and camlocks.
4. Cover all chuck jaws and scroll inside the
chuck with Mobilith AW2. Cover spindle, cam
locks, and chuck body with a light film of Mobil
DTE Oil Heavy Medium.
5. Lift chuck up to spindle nose and press onto
spindle. Tighten in place by turning cam locks
1/4 turn clockwise. The index mark (A, Figure
5-3) on the camlock should be between the
two indicator arrows (B, Figure 5-3). If the
index mark is not between the two arrows,
remove chuck and adjust the camlock studs by
either turning out one full turn (if cams will not
engage) or turning in one full turn (if cams turn
beyond indicator marks).
6. Install chuck and tighten in place.
ATTENTION: Only when the incised line on chuck
lines up with that on the spindle, can the chuck be
mounted.
9
5.4 Chuck guard installation
Install chuck guard to headstock, if it is not already
mounted. (See parts breakdown if clarification is
needed for assembly.)
6.0 Lubrication
Lathe must be serviced at all
lubrication points and all reservoirs filled to
operating level before lathe is placed into
service. Failure to comply may cause serious
damage to lathe.
1. Headstock – Oil must be up to indicator mark
in oil sight glass (A, Figure 6-1). Top off with
Mobil DTE Oil Heavy Medium. Fill by pulling
plug located on top of headstock cover
beneath rubber mat. Drain oil by removing
drain plug (C, Figure 6-2) and refill after first
month of operation. Clean out any metal
shavings. Then, change oil in headstock
annually.
2. External Gears – Coat all gears with a heavy,
non-slinging grease, see Figure 6-2. Do not
get grease on pulleys or belts.
3. Gear Shaft – Find the oil nipple (F, Figure 8-2)
and oil with a couple drops of Mobil DTE Oil
Heavy Medium once weekly.
4. Gearbox – Oil must be up to indicator mark in
oil sight glass (B, Figure 6-1). Top off with
Mobil DTE Oil Heavy Medium. Fill by
removing plug (D, Figure 6-2). Drain oil by
removing drain plug (E, Figure 6-2) and refill
after first month of operation. Then, change oil
in gearbox annually.
5. Apron – Oil must be up to indicator mark in oil
sight glass (A, Figure 6-3). Top off with Mobil
DTE Oil Heavy Medium. Fill by removing oil
knurled plug (B, Figure 6-3). After the first
three months of operation, drain oil completely
(drain is on bottom of apron) and refill with
Mobil DTE Oil Heavy Medium or equivalent,
to the indicator line. Then, change oil annually.
6. Carriage – Lubricate two ball oilers on top of
carriage once daily with Mobil DTE Oil Heavy
Medium.
Figure 6-1
Figure 6-2
10
Figure 6-3
7. Compound Rest – Lubricate three ball oilers
(F, Figure 6-4) once daily with Mobil DTE Oil
Heavy Medium.
8. Cross Slide – Lubricate four ball oilers (G,
Figure 6-4) once daily with Mobil DTE Oil
Heavy Medium.
9. Longitudinal Feed Handwheel – Lubricate
ball oiler (H, Figure 6-4) once daily with Mobil
DTE Oil Heavy Medium.
Figure 6-4
10. Tailstock – Lubricate ball oilers (I, Figure 6-5)
once daily with Mobil DTE Oil Heavy
Medium.
11. Leadscrew/Feed Rod – Lubricate ball oilers
once daily (J, Figure 6-5) with Mobil DTE Oil
Heavy Medium.
Figure 6-5
7.0 Electrical connections
Electrical connections must be
made by a qualified electrician in compliance
with all relevant codes. This machine must be
properly grounded to help prevent electrical
shock and possible fatal injury.
The GH-1440B Lathe is rated at 230-volt power
only. It is not provided with a power plug; you may
either attach a proper 230V UL-listed plug, or
“hardwire” the machine directly to a service panel
(make sure a disconnect is available to the
operator).
Before connecting to power source, be sure switch
is in off position.
It is recommended that the lathe be connected to a
dedicated 20A amp circuit with circuit breaker or
fuse. Local codes take precedence over
recommendations.
7.1 GROUNDING INSTRUCTIONS
This tool must be grounded. In the event of a
malfunction or breakdown, grounding provides a
path of least resistance for electric current to
reduce the risk of electric shock. This tool is
equipped with an electric cord having an
equipment-grounding conductor. If a plug is used,
the plug must be inserted into an appropriate outlet
that is properly installed and grounded in
accordance with all local codes and ordinances.
Improper connection of the
equipment-grounding conductor can result in a
risk of electric shock. Check with a qualified
electrician or service person if you are in doubt
as to whether the outlet is properly grounded.
Do not modify the plug – if it will not fit the
outlet, have a proper outlet installed by a
qualified electrician.
The conductor with insulation having an outer
surface that is green with or without yellow stripes
is the equipment-grounding conductor. If repair or
replacement of the electric cord or plug is
necessary, do not connect the equipmentgrounding conductor to a live terminal.
Use only 3-wire extension cords that have 3-prong
grounding plugs and 3-pole receptacles that accept
the tool's plug.
Repair or replace damaged or worn cord
immediately.
If used with a plug:
Grounded, cord-connected tools intended for use
on a supply circuit having a nominal rating between
150-250 V inclusive:
11
This tool is intended for use on a circuit that has an
outlet that looks like the one illustrated in Figure 7-
1. The tool is intended for use with a grounding
plug that looks like the plug illustrated in Figure 7-
1. Make sure the tool is connected to an outlet
having the same configuration as the plug. No
adapter is available or should be used with this
tool. If the tool must be reconnected for use on a
different type of electric circuit, the reconnection
should be made by qualified service personnel;
and after reconnection, the tool should comply with
all local codes and ordinances.
If hardwired:
Permanently connected tools: This tool should be
connected to a grounded metal permanent wiring
system; or to a system having an equipmentgrounding conductor.
8.0 General description
8.1 Lathe bed
The lathe bed (A, Figure 8-1) is made of high grade
cast iron. By combining high cheeks with strong
cross ribs, a bed with low vibration and high rigidity
is realized. Two precision ground V-slideways,
reinforced by heat hardening and grinding, are an
accurate guide for the carriage and headstock. The
main drive motor is mounted to the rear of the bed.
Figure 8-1
Figure 7-1
7.2 Extension cords
The use of extension cords is discouraged; try to
position equipment within reach of the power
source. If an extension cord becomes necessary,
be sure it is heavy enough to carry the current your
product will draw. An undersized cord will cause a
drop in line voltage resulting in loss of power and
overheating.
Table 1 shows recommended size to use
depending on cord length and nameplate ampere
rating. If in doubt, use the next heavier gauge. The
smaller the gauge number, the heavier the cord.
Ampere
Rating
More
Than
00 06 18 16 16 14
06 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12
Not
More
Than
Table 2: Extension cord recommendations
Volts
240 50 100 200 300
AWG
Total length of
cord in feet
Not
Recommended
8.2 Carriage
The carriage (B, Fig. 10) is made from high quality
cast iron. The sliding parts are smooth ground. The
cross-slide is mounted on the carriage and moves
on a dove-tailed slide which can be adjusted for
play by means of gibs.
The compound slide (C, Figure 8-1), which is
mounted on the cross slide (D, Figure 8-1), can be
rotated through 360°. The compound slide and the
cross slide travel in a dovetail slide and have
adjustable gibs. A four-way tool post (E, Figure 8-
1) is fitted on the compound slide.
8.3 Headstock
The headstock (F, Figure 8-1) is cast from high
grade, low vibration cast iron. It is mounted to the
bed by four bolts with two adjusting bolts for
alignment. In the head, the spindle is mounted on
two precision taper roller bearings. The hollow
spindle has Morse Taper #6 with a 2" bore.
8.4 Quick change tool post
The quick change tool post (E, Figure 8-1) is
mounted on the compound slide and allows tool
holders to be mounted easily. Remember to use a
minimum of two clamping screws when installing a
cutting tool.
12
Figure 8-2
8.5 Apron
The apron (A, Figure 8-2) is mounted to the
carriage. In the apron a half nut is fitted. The half
nut gibs can be adjusted from the outside. The half
nut is engaged by use of a lever. Quick travel of
the apron is accomplished by means of a bedmounted rack and pinion, operated by a
handwheel on front of apron.
8.6 Tailstock
The tailstock (B, Figure 8-2) slides on a v-way and
can be locked at any location by a clamping lever.
The tailstock has a heavy-duty spindle with a
Morse Taper #4.
The sliding fingers are set similar to the steady
rest, free of play, but not binding. The sliding
fingers require continuous lubrication at the contact
points with the workpiece to prevent premature
wear.
9.0 Controls
8.7 Leadscrew and feed rod
The leadscrew (C Figure 8-2) and feed rod (D,
Figure 8-2) are mounted on the front of machine
bed. They are connected to the gearbox at the left
for automatic feed and lead. They are supported by
bushings on both ends.
8.8 Gear box
The gear box (E, Figure 8-2) is made from high
quality cast iron and is mounted to left side of
machine bed.
8.9 Steady rest
The steady rest (F, Figure 8-2) serves as a support
for shafts on the free tailstock end. The steady rest
is mounted on the bedway and secured from below
with bolt, nut and locking plate.
8.10 Follow rest
The traveling follow rest (G, Figure 8-2) is mounted
on the saddle and follows the movement of the
turning tool. Only two fingers are required as the
turning tool takes the place of the third. The follow
rest is used for tuning operations on long, slender
workpieces. It prevents flexing of the workpiece
from the pressure of the cutting tool.
Figure 9-1
1. Emergency Stop Switch (A, Figure 9-1) –
Press to stop all machine functions. Caution:
lathe will still have power. To restart
machine, rotate button clockwise until it
disengages.
2. Jog Switch (B, Figure 9-1) – Press and
release to advance spindle momentarily.
3. Power Indicator Light (C, Figure 9-1) –
Illuminated whenever lathe has power.
4. Coolant On-Off Switch (D, Figure 9-1) –
Turns coolant pump on and off.
5. Feed Rod/Leadscrew Selector (E, Figure 9-
1) – Use knob to activate leadscrew and feed
rod.
6. Speed Selector Levers (F, Figure 9-1) – Use
to select spindle speeds in ranges.
7. Feed Direction Selector (G, Figure 9-1) –
Selects carriage travel direction when chuck is
rotating in forward direction (or counterclockwise as viewed from front of chuck).
8. Feed Rate Selector (H, Figure 9-1) – Use
knobs to set desired feed, or lead rates.
13
9. Longitudinal Traverse Handwheel (A, Figure
9-2) – Rotate handwheel clockwise to move
apron assembly toward tailstock (right). Rotate
handwheel counterclockwise to move apron
assembly toward headstock (left).
10. Feed Selector (B, Figure 9-2) – Push lever to
the left and down to activate crossfeed
function. Pull lever to the right and up to
activate longitudinal function.
11. Half Nut Engagement Lever (thread cutting)
(C, Figure 9-2) – Move lever down to engage.
Move lever up to disengage.
12. Cross Traverse Handwheel (D, Figure 9-2) –
Clockwise rotation moves cross slide toward
rear of machine.
13. Compound Slide Traverse Handwheel (E,
Figure 9-2) – Rotate clockwise or counterclockwise to move or position.
14. Tool Post Clamping Lever (F, Figure 9-2) –
Rotate counterclockwise to loosen and
clockwise to tighten. Rotate tool post when
lever is unlocked.
15. Threading Dial (G, Figure 9-2) – Engage by
pushing into the leadscrew. Pull out to
disengage. The dial indicator and chart will
specify at which point a thread can be entered.
16. Forward/Reverse Lever (H, Figure 9-2) – Pull
lever up for clockwise spindle rotation
(reverse). Push lever down for counterclockwise spindle rotation (forward). Neutral
position is a center detent and spindle remains
idle.
17. Compound Rest Lock (I, Figure 9-3) – Turn
hex nut clockwise to lock and counterclockwise to unlock.
18. Compound Slide Lock (J, Figure 9-4) – Turn
set screw clockwise to tighten and counterclockwise to loosen.
19. Cross Slide Lock (K, Figure 9-4) – Turn set
screw clockwise, and tighten to lock. Turn
counterclockwise and loosen to unlock.
Cross slide lock screw
must be unlocked before engaging
automatic feeds or damage to lathe may
occur.
20. Carriage Lock (L, Figure 9-3) – Turn hex
socket cap screw clockwise and tighten to
lock. Turn counterclockwise and loosen to
unlock.
22. Tailstock Clamping Lever (N, Figure 9-4) –
Lift up lever to lock. Push down lever to
unlock.
23. Tailstock Quill Traverse Handwheel (O,
Figure 9-4) – Rotate clockwise to advance
quill. Rotate counterclockwise to retract quill.
24. Tailstock Off-Set Adjustment – Three set
screws located on tailstock base are used to
off-set tailstock for cutting tapers. Loosen lock
screw on tailstock end. Loosen one side set
screw (P, Figure 9-4) while tightening the other
until the amount of off-set is indicated on
scale. Tighten lock screw.
Figure 9-2
Figure 9-3
Carriage lock screw must
be unlocked before engaging automatic
feeds or damage to lathe may occur.
21. Tailstock Quill Clamping Lever (M, Figure 9-
4) – Lift up to lock spindle. Push down to
unlock.
14
Figure 9-4
10.0 Operation
10.1 Break-in procedure
During manufacturing and testing, this lathe has
been operated in the low RPM range for three
hours.
To allow time for the gears and bearings to breakin and run smoothly, do not run the lathe above
755 RPM for the first six hours of operation and
use.
10.2 Feed and thread selection
1. Refer to the feed and thread table (A, Figure
10-1; also sect. 12.0 of this manual).
2. Move knobs and handle (B, Figure 10-1) to
appropriate positions.
Figure 10-2
10.4 Automatic feed operation and
feed changes
1. Move the forward/reverse selector (A, Figure
10-3) up or down depending on desired
direction.
Figure 10-1
10.3 Change gear replacement
Note: The 30T, 60T, 120T and 127T gears are
installed in the end gear compartment when
delivered from the factory. This combination will
cover most inch feeds and threads under normal
circumstances. The additional gears found in the
toolbox are used for some metric threads and
feeds.
1. Disconnect machine from power source.
2. Open the cover on left end of headstock.
3. Loosen hex nuts (E/F, Figure 10-2). Move
quadrant out of the way.
4. Change gears (G, Figure 10-2) to match feed
and thread chart.
5. Thoroughly clean and install new gears.
6. Move quadrant so the large gear meshes with
the smaller gears, and tighten to secure in
place. Note: Make sure there is backlash of
0.002” – 0.003” between gears. Setting gears
too tight will cause excessive noise and wear.
7. Close cover and connect machine to power
source.
Figure 10-3
2. Turn knob (B, Figure 10-4) so that the arrow
points at the round circle to start the feed rod
rotating.
Figure 10-4
10.5 Powered carriage travel
Push lever (C, Figure 10-3) down to engage cross
feed. Pull lever up to engage longitudinal feed.
15
10.6 Thread cutting
1. Set feed rate selectors (D/E/F, Figure 10-4) in
proper position for correct feed rate of the
thread pitch to be cut.
2. Turn knob (B, Figure 10-4) so that the arrow
points to 1, 2, 3 or 4 to start the thread cutting.
3. Engage half nut lever (G, Figure 10-3).
4. The half nut lever and the threading dial are
used to thread in the conventional manner.
The thread dial chart specifies at which point a
thread can be entered using the threading dial.
5. To cut metric threads, the half nuts must be
left continually engaged once the start point
has been selected and the half nut is initially
engaged (thread dial cannot be used).
11.0 Adjustments
11.1 Saddle adjustment
1. Loosen four hex nuts (A, Figure 11-1) found on
the bottom rear of cross slide.
2. Turn each of four set screws (B, Figure 11-1)
equally with a hex wrench until a slight
resistance is felt. Do not overtighten.
3. Move carriage with handwheel and determine
if drag is to your preference. Readjust
setscrews as necessary to achieve desired
drag.
4. Hold socket set screw firmly with a hex wrench
and tighten hex nut to lock in place.
5. Move the carriage again and adjust if
necessary. CAUTION: Over-adjustment will
cause excessive, premature wear of gibs.
2. Tighten front gib screw a quarter turn. Turn the
cross slide handwheel to see if the cross slide
is still loose. If it is still loose, tighten the front
screw a bit more and try again.
3. When cross slide is properly adjusted, snug
rear gib screw. Do not overtighten; this will
cause premature wear on the gib and mating
parts.
11.3 Compound slide adjustment
Follow same procedure as for cross slide
adjustment, to adjust the compound rest.
11.4 Tailstock adjustment
If the handle will not lock the tailstock securely, use
the following procedure:
1. Lower handle to unlocked position.
2. Slide tailstock to an area that will allow you to
reach under the tailstock.
3. Tighten tailstock clamping nut 1/4 turn, and retest for proper locking. Repeat as necessary.
11.5 Half nut gib adjustment
1. Remove thread dial assembly by unscrewing
the screw (D, Figure 11-2).
2. Loosen three hex nuts (E, Figure 11-2) found
on side of apron, and turn three set screws (F,
Figure 11-2) equally with a hex wrench.
3. Adjust properly for wear and play. Hold socket
set screw firmly with a hex wrench and tighten
hex nut to lock in place. CAUTION: Overadjustment will cause excessive, premature
wear on gib and mating parts.
Figure 11-1
11.2 Cross slide adjustment
If the cross slide is too loose, follow procedure
below to tighten:
1. Loosen the rear gib screw (C, Fig. 20)
approximately one turn.
Figure 11-2
16
11.6 Headstock alignment
The headstock has been aligned at the factory and
should not require adjustment. However, if
adjustment is deemed necessary, follow procedure
below to align headstock.
1. Using an engineer's precision level on the
bedways, make sure lathe is level side-to-side
and front-to-back. If lathe is not level, correct
to a level condition before proceeding. Re-test
alignment if any leveling adjustments were
made.
2. From steel bar stock of approximately two
inches in diameter, cut a piece approximately
eight inches long.
3. Place two inches of bar stock into chuck and
tighten chuck. Do not use tailstock or center to
support the other end.
4. Set up and cut along five inches of bar stock.
5. Using a micrometer, measure bar stock next to
the chuck and at the end. The measurement
should be the same.
6. If the measurements are not the same and
adjustment is required, loosen the four bolts
that hold headstock to bed. Do not loosen
completely; some drag should remain.
7. Loosen two hex nuts found on the two
adjusting bolts located on backside of
headstock just above motor mount bracket.
Adjust the bolts for alignment and tighten hex
nuts. Tighten headstock bolts and make
another cut. Keep adjusting screws after each
cut until the bar stock measurements are the
same. Tighten all headstock bolts and jam
nuts on adjusting screws.
2. Remove the four hex socket cap screws (C,
Figure 11-3) with a hex key wrench.
3. Gap bridge can now be removed.
11.8 Installing gap bridge
1. Clean bottom and ends of gap bridge
thoroughly.
2. Set gap bridge in place and align.
3. Remove nuts (A, Figure 11-3) from taper pins
(B, Figure 11-3).
4. Slide taper pins in their respective holes and
seat using a mallet. Install nuts on taper pins
finger tight.
5. Install four socket head cap screws (C, Figure
11-3) and tighten securely.
11.7 Removing gap bridge
1. Using an open end wrench, tighten the two
hex nuts (A, Figure 11-3). This will cause the
taper pins (B, Figure 11-3) to release. Remove
the taper pins.
17
Figure 11-3
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