Grizzly G0757Z User Manual

MODEL G0757Z

VARIABLE-SPEED HORIZONTAL/

VERTICAL MILL w/DRO

OWNER'S MANUAL

(For models manufactured since 02/15)

COPYRIGHT © JULY, 2015 BY GRIZZLY INDUSTRIAL

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

#BB17431 PRINTED IN CHINA

V1.07.15

This manual provides critical safety instructions on the proper setup,
operation, maintenance, and service of this machine/tool. Save this
document, refer to it often, and use it to instruct other operators.

Failure to read, understand and follow the instructions in this manual
may result in fire or serious personal injury—including amputation,
electrocution, or death.

The owner of this machine/tool is solely responsible for its safe use.
This responsibility includes but is not limited to proper installation in
a safe environment, personnel training and usage authorization,
proper inspection and maintenance, manual availability and compre­hension, application of safety devices, cutting/sanding/grinding tool
integrity, and the usage of personal protective equipment.

The manufacturer will not be held liable for injury or property damage
from negligence, improper training, machine modifications or misuse.

Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:

• Lead from lead-based paints.

• Crystalline silica from bricks, cement and other masonry products.

• Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures 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 those dust masks that are specially designed to filter
out microscopic particles.

Table of Contents

INTRODUCTION ............................................... 2

Contact Info.................................................... 2

Manual Accuracy ........................................... 2

Left Front View Identification ......................... 3

Right Front View Identification ....................... 4

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

Machine Data Sheet ...................................... 7

SECTION 1: SAFETY ..................................... 10

Safety Instructions for Machinery ................ 10

Additional Safety for Milling Machines ......... 12

SECTION 2: POWER SUPPLY ...................... 13

SECTION 3: SETUP ....................................... 15

Needed for Setup ......................................... 15

Unpacking .................................................... 15

Inventory ...................................................... 16

Cleanup ........................................................ 17

Site Considerations ...................................... 18

Lifting & Placing ........................................... 19

Leveling ........................................................ 20

Anchoring to Floor ....................................... 20

Arbor/Chuck Assembly ................................ 21

Verifying Lubrication .................................... 21

Assembly ..................................................... 22

Power Connection........................................ 23

Test Run ...................................................... 23

Spindle Break-In .......................................... 25

Inspections & Adjustments .......................... 26

SECTION 4: OPERATIONS ........................... 27

Operation Overview ..................................... 27

Table Movement .......................................... 28

Head Tilt....................................................... 29

Ram Movement............................................ 30

Installing/Removing Tooling ......................... 31

Spindle Speed.............................................. 35

Using Spindle Downfeed Controls ............... 37

SECTION 5: ACCESSORIES ......................... 39

SECTION 6: MAINTENANCE ......................... 44

Schedule ...................................................... 44

Cleaning & Protecting .................................. 44

Lubrication ................................................... 45

Adding/Changing Coolant ............................ 51

V-Belt Service .............................................. 52

Machine Storage .......................................... 54

SECTION 7: SERVICE ................................... 55

Troubleshooting ........................................... 55

Tramming Mill Head ..................................... 58

Adjusting Leadscrew Backlash .................... 60

Adjusting Gibs .............................................. 61

SECTION 8: WIRING ...................................... 62

Wiring Safety Instructions ............................ 62

Wiring Overview ........................................... 63

Component Location .................................... 63

Electrical Panel Wiring Diagram .................. 64

Electrical Cabinet Wiring .............................. 65

Control Panel Wiring .................................... 66

Vertical Spindle Motor Wiring ...................... 67

Horizontal Spindle Motor Wiring .................. 67

Coolant Pump Wiring ................................... 68

DRO Wiring .................................................. 68

SECTION 9: PARTS ....................................... 69

Column ......................................................... 69

Table ............................................................ 71

Horizontal Spindle ........................................ 73

Vertical Spindle ............................................ 75

Vertical Gearbox .......................................... 77

Electrical Components ................................. 79

Electrical Components Cont. ....................... 80

Accessories .................................................. 81

Labels & Cosmetics ..................................... 82

WARRANTY & RETURNS ............................. 85

We stand behind our machines! If you have ques­tions or need help, contact us with the information
below. Before contacting, make sure you get the

serial number

machine ID label. This will help us help you faster.

We want your feedback on this manual. What did
you like about it? Where could it be improved?
Please take a few minutes to give us feedback.

Email: [e-mail]

We are proud to provide a high-quality owner’s
manual with your new machine!

We

instruc­tions, specifications, drawings, and photographs
in this manual. Sometimes we make mistakes, but
our policy of continuous improvement also means
that

you receive is

slightly different than shown in the manual

If you find this to be the case, and the difference
between the manual and machine leaves you
confused or unsure about something

check our

website for an updated version. W

current

manuals and

on our web-

site at

Alternatively, you can call our Technical Support
for help. Before calling, make sure you write down
the

from
the machine ID label (see below). This information
is required for us to provide proper tech support,
and it helps us determine if updated documenta­tion is available for your machine.

INTRODUCTION

Contact Info

and manufacture date from the

Grizzly Technical Support

1203 Lycoming Mall Circle

Muncy, PA 17756

Phone: [phone]

Email: [e-mail]

Grizzly Documentation Manager

P.O. Box 2069

Bellingham, WA 98227-2069

Manual Accuracy

made every effort to be exact with the

sometimes the machine

.

,

e post

manual updates for free

www.grizzly.com.

Manufacture Date and Serial Number

Manufacture Date

Serial Number

-2-

Model G0757Z (Mfd. Since 02/15)

Horizontal Arbor

Support

Left Front View Identification

Spindle

Motor

Master

Halogen

Work Light

Control Panel

DRO

X-Axis

Handwheel

Electrical

Cabinet

Vertical
Spindle

Coolant

Nozzle

Splash

Pan

Base

Coolant

Pump

Model G0757Z (Mfd. Since 02/15)

-3-

Right Front View Identification

High/Low

Gear Selector

Coarse

Downfeed

Lever

Fine

Downfeed

Handwheel

Z-Axis

Crank

Handwheel

Ram

Controls

Horizontal

Spindle

X-Axis

Handwheel

X-Axis

Power Feed

Y-Axis

-4-

Model G0757Z (Mfd. Since 02/15)

Controls &

To reduce your risk of
serious injury, read this
entire manual BEFORE

Control Panel

Components

using machine.

Refer to Figures 1–4 and the following descrip­tions to become familiar with the basic controls
and components of this machine. Understanding
these items and how they work will help you
understand the rest of the manual and stay safe
when operating this machine.

Master Power Switch

A

H

A. Vertical Spindle RPM Readout: Displays

current spindle RPM.

B. FORWARD Button (Vertical Spindle

Starts vertical spindle forward rotation (clock­wise looking down on headstock).

B

E

I

Figure 2. Control panel.

C

F

D

G

K

J

):

Master

Power Switch

Figure 1. Location of master power switch.

Master Power Switch: Enables power to flow to

machine.

Spindle rotation direction can ONLY be
changed when spindle is completely
stopped.

C. REVERSE Button (Vertical Spindle

Starts vertical spindle reverse rotation (coun­terclockwise looking down on headstock).

D. STOP Button (Vertical Spindle

vertical spindle rotation.

E. FORWARD Button (Horizontal Spindle

Starts horizontal spindle forward rotation (coun­terclockwise as viewed from front of machine).

F. REVERSE Button (Horizontal Spindle

Starts horizontal spindle reverse rotation (clock­wise as viewed from front of machine).

G. STOP Button (Horizontal Spindle

horizontal spindle rotation.

): Stops

): Stops

):

):

):

Model G0757Z (Mfd. Since 02/15)

H. Variable-Speed Dial: Controls speed of ver-

tical spindle.

-5-

I. POWER Lamp Button: When pressed, illu-

minates and enables power to control panel.
E-STOP button must be reset first.

J. E-STOP Button: Disables power to control

panel and stops all machine functions. To
reset, twist button clockwise until it pops out.

K. Coolant Pump Switch: Starts/stops coolant

pump and flow of coolant.

X-Axis Power Feed

E. Directional Lever: Selects direction of table

movement. Center position is neutral.

F. Speed Dial: Controls speed of table move-

ment. Turning dial clockwise causes table to
move faster.

Note: Feed rates for table travel are extreme-

ly difficult to precisely calculate. We recom­mend that you combine research and experi­mentation to find feed rates that best work for
your operations.

B

A

E

F

G

Figure 3. Power feed components.

A. Limit Switch: Stops powered table move-

ment when either side plunger comes in con­tact with limit stops.

B. Limit Stop: Limits X-axis table travel (one on

either end of table).

C. Graduated Dial: Displays X-axis table move-

ment in 0.001" increments, with each revolu­tion equaling 0.200" of travel.

D. Handwheel: Manually positions table.

C

H

D

I

G. Reset Button: Resets internal circuit breaker

if unit is overloaded and shuts down.

H. ON/OFF Switch: Enables/disables power to

unit.

I. Rapid Traverse Button: Once directional

lever has been activated, causes table to
travel at full speed while pushed.

Headstock

High/Low

Gear Selector

Figure 4. Headstock controls.

High/Low Gear Selector: Selects between high

and low gears on the vertical spindle.

-6-

Model G0757Z (Mfd. Since 02/15)

Machine Data Sheet

MACHINE DATA

SHEET

Customer Service #: [phone] · To Order Call: [phone] · Fax #: [phone]

MODEL G0757Z VARIABLE‐SPEED HORIZONTAL/VERTICAL

MILL WITH DRO

Product Dimensions:

Weight............................................................................................................................................................ 1874 lbs.

Width (side-to-side) x Depth (front-to-back) x Height..................................................................... 53-1/2 x 55 x 82 in.

Footprint (Length x Width)..................................................................................................................... 35-1/2 x 20 in.

Space Required for Full Range of Movement (Width x Depth).................................................................... 76 x 58 in.

Shipping Dimensions:

Type.......................................................................................................................................................... Wood Crate

Content........................................................................................................................................................... Machine

Weight............................................................................................................................................................ 2050 lbs.

Length x Width x Height....................................................................................................................... 53 x 45 x 88 in.

Must Ship Upright................................................................................................................................................... Yes

Electrical:

Power Requirement........................................................................................................... 220V, Single-Phase, 60 Hz

Full-Load Current Rating....................................................................................................................................... 9.5A

Minimum Circuit Size.............................................................................................................................................. 15A

Power Cord Included.............................................................................................................................................. Yes

Power Cord Length.......................................................................................................................................... 6-1/2 ft.

Power Cord Gauge......................................................................................................................................... 14 AWG

Plug Included........................................................................................................................................................... No

Recommended Plug Type.......................................................................................................................... NEMA 6-15

Switch Type.............................................................................................................. Control Panel with E-Stop Button

Inverter Type............................................................................................................................................ Delta VFD-E

Motors:

Coolant Pump

Vertical Spindle

Type............................................................................................................... TEFC Permanent-Split Capacitor

Horsepower................................................................................................................................................. 40W

Phase............................................................................................................................................ Single-Phase

Amps........................................................................................................................................................... 0.2A

Speed................................................................................................................................................ 2800 RPM

Power Transfer ............................................................................................................................... Direct Drive

Bearings..................................................................................................... Shielded & Permanently Lubricated

Type................................................................................................................. TEFC Capacitor-Start Induction

Horsepower................................................................................................................................................ 3 HP

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

Amps........................................................................................................................................................... 9.3A

Speed................................................................................................................................................ 1500 RPM

Power Transfer ................................................................................................................................. Gear Drive

Bearings..................................................................................................... Shielded & Permanently Lubricated

Model G0757Z (Mfd. Since 02/15)

-7-

Horizontal Spindle

Type.................................................................................................................

Horsepower................................................................................................................................................

Phase............................................................................................................................................ Single-Phase

Amps........................................................................................................................................................... 8.6A

Speed................................................................................................................................................ 1725 RPM

Power Transfer ............................................................................................................................... V-Belt Drive

Bearings..................................................................................................... Shielded & Permanently Lubricated

Main Specifications:

Operation Info

Spindle Travel.............................................................................................................................................. 5 in.

Max Distance Spindle to Column........................................................................................................ 26-3/4 in.

Max Distance Spindle to Table............................................................................................................ 14-1/2 in.

Maximum Distance Horizontal Spindle Center to Table...................................................................... 14-1/8 in.

Longitudinal Table Travel (X-Axis)...................................................................................................... 23-1/2 in.

Cross Table Travel (Y-Axis).................................................................................................................. 8-1/2 in.

Vertical Table Travel (Z-Axis).............................................................................................................. 12-1/2 in.

Table Swivel (Left/Right)........................................................................................................................ 45 deg.

Ram Travel................................................................................................................................................ 11 in.

Turret or Column Swivel (Left /Right)................................................................................................... 180 deg.

Head Tilt (Left/Right).............................................................................................................................. 90 deg.

Drilling Capacity for Cast Iron................................................................................................................ 1-1/8 in.

Drilling Capacity for Steel............................................................................................................................ 1 in.

End Milling Capacity.................................................................................................................................... 1 in.

Face Milling Capacity................................................................................................................................... 4 in.

TEFC Capacitor-Start Induction

2 HP

Table Info

Table Length........................................................................................................................................ 39-3/8 in.

Table Width........................................................................................................................................... 9-1/2 in.

Table Thickness.................................................................................................................................... 2-3/8 in.

Number of T-Slots............................................................................................................................................ 3

T-Slot Size................................................................................................................................................ 5/8 in.

T-Slots Centers............................................................................................................................................

Number of Longitudinal Feeds.............................................................................................................. Variable

X-Axis Table Power Feed Rate................................................................................................... 0 – 11.67 FPM

X/Y-Axis Travel per Handwheel Revolution.......................................................................................... 0.200 in.

Z-Axis Travel per Handwheel Revolution............................................................................................. 0.200 in.

Spindle Info

Spindle Taper...............................................................................................................................................

Range of Vertical Spindle Speeds......................................................................... 100 – 600, 350 – 2000 RPM

Quill Diameter........................................................................................................................................

Drawbar Thread Size............................................................................................................................. 7/16-20

Drawbar Length............................................................................................................................. 20, 13-3/4 in.

Spindle Bearings..................................................................................................

Horizontal Spindle Taper.............................................................................................................................. R-8

Number of Horizontal Spindle Speeds............................................................................................................. 8

Range of Horizontal Spindle Speeds.........................................................................................

Horizontal Spindle Bearing Type......................................................................... Tapered Roller Bearings (P5)

Construction

Spindle Housing/Quill........................................................................................................... Chromed Cast Iron

Table....................................................................................................................... Precision-Ground Cast Iron

Head.................................................................................................................................................... Cast Iron

Column/Base....................................................................................................................................... Cast Iron

Base..................................................................................................................................................... Cast Iron

Paint Type/Finish.................................................................................................................................... Enamel

Tapered Roller Bearings (P5)

72 – 1300 RPM

3 in.

R-8

3-1/2 in.

-8-

Model G0757Z (Mfd. Since 02/15)

Other Specifications:

Country of Origin ................................................................................................................................................

Warranty ...........................................................................................................................................................

Serial Number Location .....................................................................................................

ISO 9001 Factory ..................................................................................................................................................

Features:

Variable-speed spindle control with digital readout for spindle RPMs
Recycling coolant system
Longitudinal power feed
High-precision P5 spindle bearings
Halogen work light
Independent high-CFM motor fan
3-Axis DRO

Accessories Included:

Arbor adapter, R-8 to MT#3
Horizontal arbors w/spacers, 1-1/4" & 1"
1 – 13mm drill chuck w/key & arbor
MT#3 to MT#2 adapter sleeve
T-bolts w/washers & nuts
Service tools & toolbox

Machine ID Label on Head

China

1 Year

Yes

Model G0757Z (Mfd. Since 02/15)

-9-

SECTION 1: SAFETY

For Your Own Safety, Read Instruction

Manual Before Operating This Machine

The purpose of safety symbols is to attract your attention to possible hazardous conditions.
This manual uses a series of symbols and signal words intended to convey the level of impor­tance of the safety messages. The progression of symbols is described below. Remember that
safety messages by themselves do not eliminate danger and are not a substitute for proper
accident prevention measures. Always use common sense and good judgment.

Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury. It may also be used to alert
against unsafe practices.

This symbol is used to alert the user to useful information about

NOTICE

proper operation of the machine.

Safety Instructions for Machinery

OWNER’S MANUAL. Read and understand this

owner’s manual BEFORE using machine.

TRAINED OPERATORS ONLY. Untrained oper­ators have a higher risk of being hurt or killed.
Only allow trained/supervised people to use this
machine. When machine is not being used, dis­connect power, remove switch keys, or lock-out
machine to prevent unauthorized use—especially
around children. Make workshop kid proof!

DANGEROUS ENVIRONMENTS. Do not use
machinery in areas that are wet, cluttered, or have
poor lighting. Operating machinery in these areas
greatly increases the risk of accidents and injury.

MENTAL ALERTNESS REQUIRED. Full mental
alertness is required for safe operation of machin­ery. Never operate under the influence of drugs or
alcohol, when tired, or when distracted.

ELECTRICAL EQUIPMENT INJURY RISKS. You
can be shocked, burned, or killed by touching live
electrical components or improperly grounded
machinery. To reduce this risk, only allow qualified
service personnel to do electrical installation or
repair work, and always disconnect power before
accessing or exposing electrical equipment.

DISCONNECT POWER FIRST.
nect machine from power supply BEFORE making
adjustments, changing tooling, or servicing machine.
This prevents an injury risk from unintended startup
or contact with live electrical components.

EYE PROTECTION. Always wear ANSI-approved
safety glasses or a face shield when operating or
observing machinery to reduce the risk of eye
injury or blindness from flying particles. Everyday
eyeglasses are NOT approved safety glasses.

Always discon-

-10 -

Model G0757Z (Mfd. Since 02/15)

WEARING PROPER APPAREL. Do not wear
clothing, apparel or jewelry that can become
entangled in moving parts. Always tie back or
cover long hair. Wear non-slip footwear to reduce
risk of slipping and losing control or accidentally
contacting cutting tool or moving parts.

HAZARDOUS DUST. Dust created by machinery
operations may cause cancer, birth defects, or
long-term respiratory damage. Be aware of dust
hazards associated with each workpiece mate­rial. Always wear a NIOSH-approved respirator to
reduce your risk.

HEARING PROTECTION. Always wear hear­ing protection when operating or observing loud
machinery. Extended exposure to this noise
without hearing protection can cause permanent
hearing loss.

REMOVE ADJUSTING TOOLS. Tools left on
machinery can become dangerous projectiles
upon startup. Never leave chuck keys, wrenches,
or any other tools on machine. Always verify
removal before starting!

USE CORRECT TOOL FOR THE JOB. Only use
this tool for its intended purpose—do not force
it or an attachment to do a job for which it was
not designed. Never make unapproved modifica­tions—modifying tool or using it differently than
intended may result in malfunction or mechanical
failure that can lead to personal injury or death!

AWKWARD POSITIONS. Keep proper footing
and balance at all times when operating machine.
Do not overreach! Avoid awkward hand positions
that make workpiece control difficult or increase
the risk of accidental injury.

CHILDREN & BYSTANDERS. Keep children and
bystanders at a safe distance from the work area.
Stop using machine if they become a distraction.

GUARDS & COVERS. Guards and covers reduce
accidental contact with moving parts or flying
debris. Make sure they are properly installed,
undamaged, and working correctly BEFORE
operating machine.

FORCING MACHINERY. Do not force machine.
It will do the job safer and better at the rate for
which it was designed.

NEVER STAND ON MACHINE. Serious injury
may occur if machine is tipped or if the cutting
tool is unintentionally contacted.

STABLE MACHINE. Unexpected movement dur­ing operation greatly increases risk of injury or
loss of control. Before starting, verify machine is
stable and mobile base (if used) is locked.

USE RECOMMENDED ACCESSORIES. Consult
this owner’s manual or the manufacturer for rec­ommended accessories. Using improper acces­sories will increase the risk of serious injury.

UNATTENDED OPERATION. To reduce the
risk of accidental injury, turn machine OFF and
ensure all moving parts completely stop before
walking away. Never leave machine running
while unattended.

MAINTAIN WITH CARE. Follow all maintenance
instructions and lubrication schedules to keep
machine in good working condition. A machine
that is improperly maintained could malfunction,
leading to serious personal injury or death.

DAMAGED PARTS. Regularly inspect machine
for damaged, loose, or mis-adjusted parts—or
any condition that could affect safe operation.
Immediately repair/replace BEFORE operating
machine. For your own safety, DO NOT operate
machine with damaged parts!

MAINTAIN POWER CORDS. When disconnect­ing cord-connected machines from power, grab
and pull the plug—NOT the cord. Pulling the cord
may damage the wires inside. Do not handle
cord/plug with wet hands. Avoid cord damage by
keeping it away from heated surfaces, high traffic
areas, harsh chemicals, and wet/damp locations.

EXPERIENCING DIFFICULTIES. If at any time
you experience difficulties performing the intend­ed operation, stop using the machine! Contact our
Technical Support at [phone].

Model G0757Z (Mfd. Since 02/15)

-11-

Additional Safety for Milling Machines

The primary risks of operating a mill are as follows: You can be seriously injured or killed by
getting clothing, jewelry, or long hair entangled with rotating cutter. You can be severely cut
or have fingers amputated from contact with the rotating cutter. You can be blinded or struck
by broken cutting tools, metal chips, workpieces, or adjustment tools thrown from the rotating
spindle with great force. To reduce your risk of serious injury when operating this machine,
completely heed and understand the following:

UNDERSTAND ALL CONTROLS. Make sure

you understand the function and proper use of all
controls before starting. This will help you avoid
making mistakes that result in serious injury.

WEAR FACE SHIELD. Always wear a face shield
in addition to safety glasses. This provides more
complete protection for your face than safety
glasses alone.

REMOVE CHUCK KEY & SPINDLE TOOLS.
Always remove chuck key, drawbar wrench, and
other tools used on the spindle immediately after
use. This will prevent them from being thrown by
the spindle upon startup.

PROPERLY SECURE CUTTER. Firmly secure
cutting tool or drill bit so it does not fly out of spin­dle during operation.

USE CORRECT SPINDLE SPEED. Follow rec­ommended speeds and feeds for each size and
type of cutting tool. This helps avoid tool breakage
during operation and ensures best cutting results.

INSPECT CUTTING TOOL. Inspect cutting tools
for sharpness, chips, or cracks before each use.
Replace dull, chipped, or cracked cutting tools
immediately.

ALLOW SPINDLE TO STOP. To minimize your
risk of entanglement, always allow spindle to stop
on its own. DO NOT stop spindle using your hand
or any other object.

SECURE WORKPIECE TO TABLE. Clamp work­piece to table or secure in a vise mounted to table,
so workpiece cannot unexpectedly shift or spin
during operation. NEVER hold workpiece by hand
during operation.

CLEAN MACHINE SAFELY. Metal chips or shav­ings can be razor sharp. DO NOT clear chips
by hand or compressed air that can force chips
farther into machine—use a brush or vacuum
instead. Never clear chips while spindle is turning.

PROPERLY MAINTAIN MACHINE. Keep machine
in proper working condition to help ensure that it
functions safely and all guards and other compo­nents work as intended. Perform routine inspec­tions and all necessary maintenance. Never oper­ate machine with damaged or worn parts that can
break or result in unexpected movement during
operation.

DISCONNECT POWER FIRST. To reduce risk of
electrocution or injury from unexpected startup,
make sure mill/drill is turned OFF, disconnected
from power, and all moving parts have come to
a complete stop before changing cutting tools or
starting any inspection, adjustment, or mainte­nance procedure.

POWER DISRUPTION. In the event of a local
power outage during operation, turn spindle switch
OFF to avoid a possible sudden startup once
power is restored.

-12-

Model G0757Z (Mfd. Since 02/15)

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 electrican or
qualified service personnel in accordance with all
applicable codes and standards.

Electrocution, fire, or
equipment damage may
occur if machine is not
correctly grounded and
connected to the power

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.

This machine is prewired to operate on a 220V
power supply circuit that has a verified ground and
meets the following requirements:

For your own safety and protection of

Note: The circuit requirements listed in this man­ual apply to a dedicated circuit—where only one
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 that the
circuit is properly sized for safe operation.

A power supply circuit includes all electrical
equipment between the breaker box or fuse panel
in the building and the machine. The power sup­ply circuit used for this machine must be sized to
safely handle the full-load current drawn from the
machine for an extended period of time. (If this
machine is connected to a circuit protected by
fuses, use a time delay fuse marked D.)

SECTION 2: POWER SUPPLY

Availability

supply.

Full-Load Current Rating

Circuit Requirements for 220V

Nominal Voltage .............................. 220V/240V

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

Phase .................................................... 1-Phase

Power Supply Circuit ......................... 15 Amps

Plug/Receptacle ............................. NEMA 6-15

Full-Load Current Rating at 220V .... 9.5 Amps

Model G0757Z (Mfg. Since 02/15)

property, consult an electrician if you are
unsure about wiring practices or electrical
codes in your area.

-13-

We do not recommend using an extension cord
with this machine.
cord, only use it if absolutely necessary and only
on a temporary basis.

Extension cords cause voltage drop, which may
damage electrical components and shorten motor
life. Voltage drop increases as the extension cord
size gets longer and the gauge size gets smaller
(higher gauge numbers indicate smaller sizes).

Any extension cord used with this machine must
contain a ground wire, match the required plug
and receptacle, and meet the following require­ments:

Grounding Instructions

This machine MUST be grounded. In the event
of certain malfunctions or breakdowns, grounding
reduces the risk of electric shock by providing a
path of least resistance for electric current.

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 or plug is nec­essary, do not connect the equipment-grounding
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 tool is properly grounded. If you ever notice
that a cord or plug is damaged or worn, discon­nect it from power, and immediately replace it with
a new one.

The power cord and plug specified under “Circuit
Requirements for 220V”
has an equipment-grounding wire and a ground­ing prong. The plug must only be inserted into
a matching receptacle (outlet) that is properly
installed and grounded in accordance with all
local codes and ordinances (see figure below).

No adapter should be used with the
required plug. If the plug does not fit the
available receptacle, or the machine must

on the previous page

GROUNDED

6-15 RECEPTACLE

Current Carrying Prongs

6-15 PLUG

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

Grounding Prong

Figure 5. Typical 6-15 plug and receptacle.

be reconnected for use on a different type
of circuit, the reconnection must be made
by a qualified electrician and comply with all
local codes and ordinances.

-14-

Extension Cords

If you must use an extension

Minimum Gauge Size ...........................14 AWG

Maximum Length (Shorter is Better).......50 ft.

Model G0757Z (Mfg. Since 02/15)

SECTION 3: SETUP

Your machine was carefully packaged for safe
transportation. Remove the packaging materials
from around your machine and inspect it. If you
discover any damage, please call us immediately

at [phone]

Save the containers and all packing materials for
possible inspection by the carrier or its agent.

Otherwise, filing a freight claim can be difficult.

When you are completely satisfied with the condi­tion of your shipment, inventory the contents.

Keep children and pets away
from plastic bags or packing
materials shipped with this

get help from other people

The following items are needed, but not included,
for the setup/assembly of this machine.

Needed for Setup

This machine presents
serious injury hazards
to untrained users. Read
through this entire manu­al to become familiar with
the controls and opera­tions before starting the
machine!

Wear safety glasses during
the entire setup process!

Description Qty

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

• Safety Glasses (for each person) ............... 1

• Solvent/Cleaner (Page 17) ......................... 1

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

• Wood Block ................................................ 1

• Disposable Shop Rags ............................... 1

• Brass Hammer ........................................... 1

• Lifting Sling (Rated for at least 2800 lbs.) . . 2

• Lifting Equipment

(Rated for at least 2800 lbs.) ...................... 1

• Mounting Hardware (Page 20) ... As Needed

HEAV Y LIFT!
Straining or crushing injury
may occur from improperly
lifting machine or some of
its parts. To reduce this risk,

and use a forklift (or other
lifting equipment) rated for
weight of this machine.

Unpacking

for advice.

SUFFOCATION HAZARD!

machine. Discard immediately.

Model G0757Z (Mfd. Since 02/15)

-15-

Inventory

The following is a list of items shipped with your
machine. Before beginning setup, lay these items
out and inventory them.

If any non-proprietary parts are missing (e.g. a
nut or a washer), we will gladly replace them; or
for the sake of expediency, replacements can be
obtained at your local hardware store.

NOTICE

If you cannot find an item on this list, care­fully check around/inside the machine and
packaging materials. Often, these items get
lost in packaging materials while unpack­ing or they are pre-installed at the factory.

Wood Crate (Figure 7) Qty

I. Bottle for Oil ............................................... 1

J. Drift Key ...................................................... 1

K. End Mill Arbor R-8–1" ................................. 1

L. Knee Crank Handle .................................... 1

M. Knee Crank ................................................ 1

N. Hardware Bag ............................................ 1

— T-Bolts M14-2 x 60 .................................. 2

— Flat Washers 14mm ................................ 2

—Hex Nuts M14-2 ...................................... 2

—Hex Wrenches 3, 4, 5, 6, 8mm .........1 Ea.

O. Vertical Spindle Drawbar
P. Horizontal Spindle Drawbar

7

⁄16"–20 x 13 3⁄4" ............................................ 1

Q. Horizontal Arbor 1

R. Horizontal Arbor 1" Dia. w/Spacers ............ 1

J

I

K

1

⁄4" Dia. w/Spacers ......... 1

L

7

⁄16"–20 x 20" ...... 1

M

Toolbox (Figure 6) Qty

A. Handwheel Handles ................................... 3

B. Coarse Downfeed Handle (2 Installed) ...... 1

C. Open-End Wrench 22/24mm...................... 1

D. Open-End Wrench 17/19mm ...................... 1

E. Drill Chuck B16, 1–13mm ........................... 1

—Chuck Key .............................................. 1

F. Spindle Sleeve R-8–MT#3 ......................... 1

G. Drill Chuck Arbor R-8–B16 ......................... 1

H. Spindle Sleeve MT#3–MT#2 ...................... 1

A

B

C

D

E

F

N

O

P

Q

R

Figure 7. Wood crate inventory.

H

Figure 6. Toolbox inventory.

-16 -

G

Model G0757Z (Mfd. Since 02/15)

The unpainted surfaces of your machine are
coated with a heavy-duty rust preventative that
prevents corrosion during shipment and storage.
This rust preventative works extremely well, but it
will take a little time to clean.

Be patient and do a thorough job cleaning your
machine. The time you spend doing this now will
give you a better appreciation for the proper care
of your machine's unpainted surfaces.

There are many ways to remove this rust preven­tative, but the following steps work well in a wide
variety of situations. Always follow the manufac­turer’s instructions with any cleaning product you
use and make sure you work in a well-ventilated
area to minimize exposure to toxic fumes.

Before cleaning, gather the following:

• Disposable rags

• Cleaner/degreaser (WD•40 works well)

• Safety glasses & disposable gloves

• Plastic paint scraper (optional)

Basic steps for removing rust preventative:

1.

2.

3.

4.

Many cleaning solvents

work in a well-ventilated

Avoid chlorine-based solvents, such as

Cleanup

Gasoline and petroleum
products have low flash
points and can explode
or cause fire if used to
clean machinery. Avoid
using these products
to clean machinery.

Put on safety glasses.

Coat the rust preventative with a liberal

amount of cleaner/degreaser, then let it soak
for 5–10 minutes.

Wipe off the surfaces. If your cleaner/degreas-

er is effective, the rust preventative will wipe
off easily. If you have a plastic paint scraper,
scrape off as much as you can first, then wipe
off the rest with the rag.

Repeat Steps 2–3 as necessary until clean,

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

are toxic if inhaled. Only

area.

NOTICE

acetone or brake parts cleaner, that may
damage painted surfaces.

T23692—Orange Power Degreaser

A great product for removing the waxy ship­ping grease from the non-painted parts of the
machine during clean up.

Figure 8. T23692 Orange Power Degreaser.

Model G0757Z (Mfd. Since 02/15)

-17-

Site Considerations

Weight Load

Physical Environment

Place this machine near an existing power source.

Shadows, glare, or strobe effects that may distract
or impede the operator must be eliminated.

Refer to the Machine Data Sheet 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 equipment that may be
installed on the machine, 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.

See below for required space allocation.

Children or untrained people
may be seriously injured by
this machine. Only install in an
access restricted location.

The physical environment where the machine is
operated is important for safe operation and lon­gevity of machine components. For best results,
operate this 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
range exceeds 41°–104°F; the relative humidity
range exceeds 20–95% (non-condensing); or the
environment is subject to vibration, shocks, or
bumps.

Electrical Installation

Make sure all power cords are protected from
traffic, material handling, moisture, chemicals,
or other hazards. Make sure to leave access to
a means of disconnecting the power source or
engaging a lockout/tagout device, if required.

Lighting

Lighting around the machine must be adequate
enough that operations can be performed safely.

-18-

Wall

Wall

30"

Minimum

Clearance

30"

Minimum

Clearance

Figure 9. Minimum working clearances.

58"

76"

Model G0757Z (Mfd. Since 02/15)

Lifting & Placing

get help from other people

HEAV Y LIFT!
Straining or crushing injury
may occur from improperly
lifting machine or some of
its parts. To reduce this risk,

and use a forklift (or other
lifting equipment) rated for
weight of this machine.

Power lifting equipment rated for at least 50%
more than the weight of the machine and at least
two other people are required to lift and place the
mill.

To lift and move mill:

Note: After repositioning ram and headstock,

make sure they are locked in place to prevent
unexpected movement while lifting.

4. Torque four turret lock bolts (two on each
side of ram, as shown in Figure 11) to 47 ft/
lbs. This will help keep ram from unexpect­edly moving from force of lifting slings.

Turret Locking Bolts

(2 of 4)

1. Remove crate from shipping pallet, then
while still on pallet, move machine to installa­tion location.

2. Remove horizontal arbor support, and extend
ram so it will clear DRO.

3. Rotate ram 180° clockwise so headstock
faces backwards (see Figure 10).

Refer to Head Tilt on Page 29 and Ram

Movement on Page 30 for detailed instruc­tions to help with this step.

Figure 11. Locations of turret locking bolts.

5. Place lifting slings under ram and connect to

a safety hook, as illustrated in Figure 10.

Note: Place protective material between

slings and mill to protect ram and ways, and
to prevent cutting lifting slings.

6. Unbolt mill from shipping pallet.

7. With other people steadying load to keep it

from swaying, lift machine a couple of inches.

— If mill tips to one side, lower it to the pallet

and adjust ram or table to balance load.
Make sure to retighten lock levers and
bolts before lifting mill again.

— If mill lifts evenly, remove shipping pallet

and lower mill into final position.

8. Rotate ram 180° counterclockwise so head­stock faces forwards, then re-install horizon­tal arbor support.

Figure 10. Using lifting slings to lift and move

Model G0757Z (Mfd. Since 02/15)

mill.

-19 -

Anchoring machinery to the floor prevents tipping
or shifting and reduces vibration that may occur
during operation, resulting in a machine that runs
slightly quieter and feels more solid.

If the machine will be installed in a commercial or
workplace setting, or if it is permanently connect­ed (hardwired) to the power supply, local codes
may require that it be anchored to the floor.

If not required by any local codes, fastening the
machine to the floor is an optional step. If you
choose not to do this with your machine, we rec­ommend placing it on machine mounts, as these
provide an easy method for leveling and they have
vibration-absorbing pads.

Lag shield anchors with lag screws (see below)
are a popular way to anchor machinery to a con­crete floor, because the anchors sit flush with the
floor surface, making it easy to unbolt and move
the machine later, if needed. However, anytime
local codes apply, you MUST follow the anchoring
methodology specified by the code.

Leveling

Leveling machinery helps precision components,
such as dovetail ways, remain straight and flat
during the lifespan of the machine. Components
on an unleveled machine 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.

See Figure 12 for an example of a high precision
level available from Grizzly.

Anchoring to Floor

Number of Mounting Holes ............................ 4

Diameter of Mounting Hardware .................

1

⁄2"

Figure 12. Example of a precision level

(Model H2683 shown).

Anchoring to Concrete Floors

Lag Screw

Flat Washer

Machine Base

Concrete

Figure 13. Popular method for anchoring

machinery to a concrete floor.

Lag Shield Anchor

Drilled Hole

-20-

Model G0757Z (Mfd. Since 02/15)

Arbor/Chuck

An arbor is included for the drill chuck that
comes with this machine. The following procedure
describes how to install the arbor in the chuck.

After the arbor is installed in the drill chuck, it
is very difficult to separate the assembly. If you
would like to use a different chuck in the future,
we recommend obtaining a new arbor.

Important: DO NOT install the drill chuck and
arbor assembly into the spindle until AFTER the
test run.

To join drill chuck and arbor:

1.

clean drill

2.

3.

4.

5. Attempt to separate drill chuck and arbor by
hand —if they separate, repeat Steps 3–4.

Assembly

Use acetone or lacquer thinner to
chuck and arbor mating surfaces, especially
the bore.

Retract chuck jaws completely into chuck.

Verifying Lubrication

GEARBOX MUST

BE FILLED WITH OIL!

OIL MAY NOT BE

SHIPPED WITH MACHINE!

Refer to Lubrication Section

for Correct Oil Type.

This machine was shipped from the factory with
oil in it, but the headstock oil reservoir level must
be verified before the mill can be operated for the
first time. Refer to the Lubrication section, begin-
ning on Page 45, for details on how to check oil.

Insert small end of arbor into chuck.

Hold assembly by the arbor and tap chuck
onto a block of wood with medium force, as
illustrated below.

Figure 14. Arbor/chuck assembly.

Damage caused by running the mill without
oil in the reservoir will not be covered under
warranty.

Model G0757Z (Mfd. Since 02/15)

-21-

Assembly

3. Thread coarse downfeed handle into coarse

downfeed hub (see Figure 17).

Your mill comes from the factory mostly assembled.
To complete assembly you must install:

• X-Axis handwheel handles

• Y-Axis handwheel handle

• Z-Axis crank

• Coarse downfeed handle

• Fine downfeed handwheel handle

Tools Needed Qty

Open-End Wrench 14, 19mm ...................... 1 Ea.

Flathead Screwdriver ..........................................1

To assemble mill:

1. Install handwheel handles onto X-axis and

Y-axis handwheels (see Figure 15).

X-Axis

Handwheel

4. Remove fine downfeed handle from rear of
fine downfeed handwheel and thread into
front of handwheel (see Figure 17).

Fine

Downfeed

Handwheel

Coarse

Downfeed Hub

Figure 17. Downfeed components assembeled.

Y-Axis

Handwheel

Figure 15. Locations of X-axis and Y-axis

handwheels.

2. Slide Z-axis crank onto square spindle (see
Figure 16).

Square
Spindle

Figure 16. Location of square spindle.

-22-

Model G0757Z (Mfd. Since 02/15)

Power Connection

DO NOT start machine until all preceding
setup instructions have been performed.
Operating an improperly set up machine

Serious injury or death can result from

Electrocution or fire can occur
if machine is ungrounded,
incorrectly connected to
power, or connected to an
undersized circuit. Use an
electrician or a qualified ser­vice personnel to ensure a
safe power connection.

Before the machine can be connected to the
power supply, there must be an electrical cir­cuit that meets the Circuit Requirements on
Page 13, and the correct plug must be installed
according to the instructions and wiring diagrams
provided by the plug manufacturer.

Test Run

Once assembly is complete, test run the machine
to ensure it is properly connected to power and
safety components function properly.

The test run consists of the following: 1) The verti­cal and horizontal spindle motors run correctly,

2) the E-STOP button and column interlock safety
features work correctly, and 3) the power feed unit
works correctly.

If you find an unusual problem during the test run,
immediately stop the machine, disconnect it from
power, and fix the problem BEFORE operating the
machine again. The Troubleshooting table in the
SERVICE section of this manual can help.

If the plug manufacturer did not include instruc­tions, the wiring of a generic NEMA 6-15 plug is
illustrated in the Wiring section on Page 63.

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.

Note About Extension Cords: Using an incor-
rectly sized extension cord may decrease the
life of electrical components on your machine.
Refer to Extension Cords on Page 14 for more
information.

using this machine BEFORE understanding
its controls and related safety information.
DO NOT operate, or allow others to operate,
machine until the information is understood.

may result in malfunction or unexpect­ed results that can lead to serious injury,
death, or machine/property damage.

Mill Test Run

1. Clear all setup tools away from machine.

2. Set horizontal spindle to 72 RPM (see Page
35 for details on how to change speeds).

Note: Make sure to close and tighten column

rear cover so interlock switch is set. Mill will
not run if this is not done.

Model G0757Z (Mfd. Since 02/15)

-23-

3. Push E-STOP button to avoid unexpected
start up when machine is connected to
power.

4. Connect mill to power source specified in
SECTION 2: POWER SUPPLY on Page 13.

5. Turn master power switch ON.

6. Twist E-STOP button clockwise until it pops
out—this resets it for operation (see Figure

18).

I

S

W

T

T

To Reset
Switch...

Twist Button

Clockwise

OFF

10. Stop spindle rotation and wait for spindle to
completely stop.

11. Repeat Steps 8–10 with vertical spindle
reverse rotation.

12. Repeat Steps 8–11 with horizontal spindle.

13. Press E-STOP button on control panel.

14. WITHOUT resetting E-STOP button, attempt

to start vertical spindle rotation. Machine
should not start.

— If machine does start (with the E-STOP

button pushed in), immediately disconnect
power to the machine. The E-STOP but­ton safety feature is not working correctly.
This safety feature must work properly
before proceeding with regular operations.
Call Tech Support for help.

Figure 18. Resetting the E-STOP button.

7. Press POWER button on control panel to

enable power to machine—power button and
spindle RPM readout should light.

8. Turn variable-speed dial fully counterclock­wise, then press FORWARD button (vertical
spindle). Rotate variable-speed dial clock­wise until 100 RPM is reached.

9. Listen for abnormal noises and watch for
anything unexpected from mill. It should run
smoothly and without excessive vibration or
rubbing noises.

— Vertical spindle motor is equipped with an

independent high CFM fan that is always
on, and a variable frequency drive which
causes the motor to emit a humming noise
during normal operation.

— Strange or unusual noises or actions

must be investigated immediately. Turn
machine OFF and disconnect it from the
power source before investigating or cor­recting potential problems.

15. Open column rear cover.

16. Reset E-STOP button.

17. WITHOUT closing column rear cover, press

POWER button. Machine should not start.

— If machine does start (with the column

rear cover open), immediately disconnect
power to the machine. The column rear
cover interlock switch safety feature is
not working correctly. This safety feature
must work properly before proceeding with
regular operations. Call Tech Support for
help.

18. Close column rear cover, and fully tighten
bolt.

-24-

Model G0757Z (Mfd. Since 02/15)

Power Feed Test Run

The spindle break-in procedure distributes lubri­cation

reduce the risk

of early

if there are any "dry" spots
or areas where lubrication has settled in the bear­ings. You
placing
first time when the machine is new or if it has
been sitting idle for longer than 6 months.

Always start the spindle break-in at the lowest
speed to minimize wear if there
Allow the spindle to run long enough to warm up
and distribute the bearing grease, then incremen­tally increase spindle speeds and repeat this pro­cess at each speed until reaching the maximum
spindle speed. Following the break-in procedure
in this progressive manner helps minimize any
potential wear that could occur before lubrication
is fully distributed.

The mill comes with a power feed unit for X-axis
table travel. Proper operation of the limit switch
attached to the front middle of the table is criti­cal for the safe use of this power feed unit. If the
power feed does not operate as expected during
the following steps, disconnect it from power and
contact our Tech Support at [phone] for
assistance.

To test power feed:

1. Make sure all tools, cables, and other items

are well clear of table movement as you fol­low these steps.

2. Refer to X-axis Power Feed identification on
Page 6 to understand how power feed, table

locks, and limit switch function.

3. Loosen X-axis table locks on front of table.

4. Make sure power feed directional lever is

in neutral (middle) position, turn speed dial
counterclockwise to lowest setting, then turn
power feed ON.

5. Move direction knob to left, slowly rotate
speed dial clockwise to increase speed, then
confirm table is moving left.

Spindle Break-In

throughout the bearings to

bearing failure

must complete this procedure before

operational loads on the spindle for the

are dry spots.

Complete spindle bearing break-in proce­dure to prevent rapid wear and tear of
spindle components once mill is placed into
operation.

6. Watch for table limit stop to hit limit switch

and turn power feed OFF, stopping table
movement.

7. Move direction knob through neutral (middle)
position and all the way right. Table should
begin moving right.

8. Confirm table stops moving when limit stop
presses against limit switch plunger.

9. Move direction knob to neutral (middle) posi­tion, turn speed dial counterclockwise to low­est setting, and turn power feed OFF.

Congratulations! The Test Run of the mill is
complete. Continue to the next page to per­form the Spindle Break-In and Inspections &
Adjustments procedures.

Model G0757Z (Mfd. Since 02/15)

DO NOT perform this procedure indepen­dently of Test Run section. Mill could be
seriously damaged if controls are set differ­ently than instructed in that section.

Vertical Spindle Break-In

1. Run vertical spindle at 100 RPM for 10

minutes (see Page 35 for details on how to
change speeds).

2. Reverse spindle rotation direction and run
spindle for an additional 10 minutes.

3. Run spindle for 5 minutes in each direction of
spindle rotation at the following speeds: 250,
500, 1000, 1500, and 2000 RPM. Make sure
to only increase speeds in the order shown.

-25-