Grizzly g0747, g0748 User Manual
MODELS G0747 & G0748
10" x 50" VERTICAL
MILLING MACHINE
w/POWER FEED
OWNER'S MANUAL
(For models manufactured since 8/12)
Model
G0747
COPYRIGHT © MARCH, 2013 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#TS15453 PRINTED IN CHINA
Model
G0748
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 ............................................... 3
Machine Description ...................................... 3
Contact Info.................................................... 3
Manual Accuracy ........................................... 3
Front View Identification ................................ 4
Model G0747 Headstock Identification .......... 5
Model G0748 Headstock Identification .......... 6
G0747 Machine Data Sheet .......................... 7
G0748 Machine Data Sheet .......................... 9
SECTION 1: SAFETY ..................................... 11
Safety Instructions for Machinery ................ 11
Additional Safety for Milling Machines ......... 13
SECTION 2: POWER SUPPLY ...................... 14
Availability ......................................................... 14
Full-Load Current Rating .................................. 14
Circuit Requirements for 220V .......................... 14
Grounding Instructions ......................................15
Extension Cords ................................................ 15
SECTION 3: SETUP ....................................... 16
Unpacking .................................................... 16
Needed for Setup ......................................... 16
Inventory ...................................................... 17
Cleanup ........................................................ 18
Site Considerations ...................................... 19
Lifting & Placing ........................................... 20
Leveling & Mounting .................................... 21
Leveling ............................................................. 21
Bolting to Concrete Floors ................................ 21
Machine Mounts ................................................ 21
Assembly ..................................................... 22
Initial Lubrication .......................................... 22
Test Run ...................................................... 23
Mill Test Run ..................................................... 23
Power Feed Test Run .......................................24
Spindle Break-In .......................................... 25
Inspections & Adjustments .......................... 25
SECTION 4: OPERATIONS ........................... 26
Operation Overview ..................................... 26
Table Movement .......................................... 27
Graduated Index Rings ..................................... 27
Table Locks ....................................................... 27
X-Axis Power Feed Identification ......................28
X-Axis Power Feed Operation .......................... 29
Head Movement........................................... 29
Tilting Head Forward/Backward ........................ 30
Rotating Head Left/Right .................................. 30
Ram Movement............................................ 31
Moving Ram Forward/Backward ....................... 31
Rotating Ram .................................................... 31
Spindle Speed.............................................. 32
Determining Spindle Speed .............................. 32
Setting Model G0747 Spindle Speed ............... 33
Setting Model G0748 Spindle Speed ............... 35
Spindle Downfeed ........................................ 36
Downfeed Controls ...........................................36
Coarse Downfeed ............................................. 37
Fine Downfeed ..................................................37
Auto-Downfeed ................................................. 38
Spindle Brake............................................... 39
Loading/Unloading Tooling .......................... 40
Loading Tooling ................................................40
Unloading Tooling ............................................. 40
SECTION 5: ACCESSORIES ......................... 41
SECTION 6: MAINTENANCE ......................... 43
Schedule ...................................................... 43
Ongoing ............................................................43
Before Beginning Operations ............................43
Daily, After Operations ......................................43
Cleaning & Protecting .................................. 43
Lubrication ................................................... 44
Quill ...................................................................44
Table Ways (One-Shot Oiler) ...........................45
Headstock Gearing ........................................... 45
Ram Ways ........................................................46
Head Tilt & Ram Pinions .................................. 46
Table Elevation Leadscrew ...............................46
Power Feed Gears ............................................47
Machine Storage .......................................... 48
SECTION 7: SERVICE ................................... 49
Troubleshooting ........................................... 49
Adjusting Gibs .............................................. 51
Adjusting Leadscrew Backlash .................... 52
X-Axis Leadscrew Backlash ............................. 52
Cross Leadscrew Backlash .............................. 53
Tramming Spindle ........................................ 54
SECTION 8: WIRING ...................................... 56
Wiring Safety Instructions ............................ 56
G0747 Wiring Diagram ................................ 57
G0748 Wiring Diagram ................................ 58
SECTION 9: PARTS ....................................... 59
Main ............................................................. 59
X- & Y-Axis Leadscrews .............................. 61
Downfeed System ........................................ 62
G0747 Headstock ........................................ 65
G0748 Headstock ........................................ 67
One-Shot Oiler ............................................. 70
Accessories .................................................. 71
G0747 Machine Labels & Cosmetics .......... 72
G0748 Machine Labels & Cosmetics .......... 73
WARRANTY & RETURNS ............................. 77
INTRODUCTION
We are proud to provide a high-quality owner’s
manual with your new machine!
We
instructions, specifications, drawings, and photographs
contained inside. Sometimes we make mistakes,
but
also
means that
you receive
will be slightly different than what is shown in
the manual
If you find this to be the case, and the difference
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for help. Before calling, please write down the
Manufacture Date
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Machine Description
These milling machines are designed to remove
material from a metal workpiece that is secured
to the work table or a mill vise. The cutting tool
is fixed to the rotating spindle and moved into the
workpiece by lowering the spindle or moving the
table. The table moves in three axes (X-, Y-, and
Z-axis) with a power feed assist for the X-axis.
Spindle downfeed options are rapid (coarse)
control or slow (fine) control with adjustable autodownfeed controls.
Both models offer a wide range of spindle speeds
and three auto-downfeed rates.
The wide range of cutting tools and optional
equipment available, combined with the flexible
features of these milling machines, make possible
countless metalworking operations.
Contact Info
Manual Accuracy
made every effort to be exact with the
our policy of continuous improvement
sometimes the machine
.
, check our website
e post current
manual updates for free on our website at
.
and Serial Number
Grizzly Technical Support
1203 Lycoming Mall Circle
Muncy, PA 17756
Phone: (570) 546-9663
Email: techsupport@grizzly.com
Grizzly Documentation Manager
P.O. Box 2069
Bellingham, WA 98227-2069
Manufacture Date
Serial Number
Model G0747/G0748 (Mfg. Since 8/12)
-3-
Front View Identification
Headstock
(see Pages 5–6)
X-Axis
Ball Handle
Power Feed
Limit Switch
Motor
Ram
Slotted
Work Table
X-Axis
Ball Handle
-4-
Knee
Crank
Y-Axis
Ball Handle
X-Axis
Power Feed
Mounting Point
(1 of 4)
Knee
Model G0747/G0748 (Mfg. Since 8/12)
To reduce your risk of
serious injury, read this
entire manual BEFORE
Model G0747 Headstock Identification
Motor
High/Low
Range Lever
Spindle
Brake
Auto-Downfeed
Rate Selector
Auto-Downfeed
Direction Pin
Fine Downfeed
Handwheel
Fine Downfeed
Clutch Lever
Spindle
Switch
Belt Tension
Adjustment Lever
Motor Lock
Lever
Belt Housing
Safety Cover
Spindle Speed
Range Selector
Manual/Power
Downfeed Selector
Coarse
Downfeed Lever
Quill Lock
Lever
Adjustable
Downfeed Stop
Quill & Spindle
Dial Indicator
Rod
using machine.
Model G0747/G0748 (Mfg. Since 8/12)
-5-
Model G0748 Headstock Identification
Spindle
Brake
Spindle
Switch
Auto-Downfeed
Rate Selector
Auto-Downfeed
Direction Pin
Fine Downfeed
Handwheel
Fine Downfeed
Clutch Lever
Motor
Low Range
Variable Speed
Indicator
High Range
Variable Speed
Indicator
Variable Speed
Handwheel
Spindle Speed
Range Selector
Manual/Power
Downfeed Selector
Coarse
Downfeed Lever
Quill Lock
Lever
Adjustable
Downfeed Stop
Quill & Spindle
Dial Indicator Rod
-6-
Model G0747/G0748 (Mfg. Since 8/12)
MACHINE DATA
SHEET
Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901
MODEL G0747 VERTICAL MILL - 16 SPEED
Product Dimensions:
Weight........................................................................................................................................................... 2,249 lbs.
Width (side-to-side) x Depth (front-to-back) x Height............................................................... 54 x 66-1/2 x 84-3/4 in.
Footprint (Length x Width)............................................................................................................................ 40 x 24 in.
Space Required for Full Range of Movement (Width x Depth).............................................................. 95 x 56-1/2 in.
Shipping Dimensions:
Type.......................................................................................................................................................... Wood Crate
Content........................................................................................................................................................... Machine
Weight............................................................................................................................................................ 2492 lbs.
Length x Width x Height....................................................................................................................... 55 x 54 x 78 in.
Must Ship Upright................................................................................................................................................... Yes
Electrical:
Power Requirement................................................................................................................... 220V, 3-Phase, 60 Hz
Prewired Voltage.................................................................................................................................................. 220V
Full-Load Current Rating....................................................................................................................................... 7.9A
Minimum Circuit Size.............................................................................................................................................. 15A
Connection Type....................................................................................................................................... Cord & Plug
Power Cord Included.............................................................................................................................................. Yes
Power Cord Length................................................................................................................................................. 6 ft.
Power Cord Gauge......................................................................................................................................... 14 AWG
Plug Included........................................................................................................................................................... No
Recommended Plug Type................................................................................................................................... 15-15
Switch Type........................................................................................................................... Forward/Reverse Switch
Recommended Phase Converter....................................................................................................................... G5845
Motors:
Main
Type........................................................................................................................................... AEVF Induction
Horsepower................................................................................................................................................ 3 HP
Phase.................................................................................................................................................... 3-Phase
Amps................................................................................................................................................. 7.8A / 7.9A
Speed..................................................................................................................................... 3450 / 1725 RPM
Power Transfer ............................................................................................................................... V-Belt Drive
Bearings..................................................................................................... Shielded & Permanently Lubricated
Model G0747/G0748 (Mfg. Since 8/12)
-7-
Main Specifications:
Operation Info
Spindle Travel.............................................................................................................................................. 5 in.
Max Distance Spindle to Column........................................................................................................ 24-3/8 in.
Max Distance Spindle to Table............................................................................................................ 16-7/8 in.
Longitudinal Table Travel (X-Axis)...................................................................................................... 29-7/8 in.
Cross Table Travel (Y-Axis)................................................................................................................ 15-3/4 in.
Vertical Table Travel (Z-Axis).................................................................................................................... 16 in.
Ram Travel................................................................................................................................................ 24 in.
Turret or Column Swivel (Left /Right)................................................................................................... 360 deg.
Head Tilt (Left/Right).............................................................................................................................. 90 deg.
Head Tilt (Front/Back)............................................................................................................................ 45 deg.
Drilling Capacity for Cast Iron................................................................................................................ 1-1/4 in.
Drilling Capacity for Steel............................................................................................................................ 1 in.
End Milling Capacity.................................................................................................................................... 1 in.
Face Milling Capacity................................................................................................................................... 3 in.
Table Info
Table Length.............................................................................................................................................. 50 in.
Table Width................................................................................................................................................ 10 in.
Table Thickness.................................................................................................................................. 3-5/16 in.
Number of T-Slots............................................................................................................................................ 3
T-Slot Size................................................................................................................................................ 5/8 in.
T-Slots Centers...................................................................................................................................... 2-1/2 in.
X/Y-Axis Travel per Handwheel Revolution.......................................................................................... 0.200 in.
Z-Axis Travel per Handwheel Revolution............................................................................................. 0.100 in.
Spindle Info
Spindle Taper............................................................................................................................................... R-8
Number of Vertical Spindle Speeds................................................................................................................ 16
Range of Vertical Spindle Speeds............................................................................................. 80 – 5440 RPM
Quill Diameter.......................................................................................................................................... 86 mm
Quill Feed Rates.................................................................................................... 0.0015, 0.003, 0.006 in./rev.
Drawbar Thread Size............................................................................................................................. 7/16-20
Drawbar Length................................................................................................................................... 23-1/2 in.
Spindle Bearings....................................................................................................... Angular Contact Bearings
Construction
Spindle Housing/Quill....................................................................... Chrome-Plated & Precision-Ground Steel
Table..................................................................................................... Precision-Ground Meehanite Cast Iron
Head................................................................................................................................................... Aluminum
Column/Base...................................................................................................................... Meehanite Cast Iron
Base..................................................................................................................................................... Cast Iron
Paint....................................................................................................................................................... Enamel
Other Specifications:
Country Of Origin ............................................................................................................................................... China
Warranty ........................................................................................................................................................... 1 Year
Approximate Assembly & Setup Time .............................................................................................................. 1 Hour
Serial Number Location ............................................................................................................... ID Label on Column
ISO 9001 Factory .................................................................................................................................................. Yes
CSA Certified .......................................................................................................................................................... No
-8-
Model G0747/G0748 (Mfg. Since 8/12)
MACHINE DATA
SHEET
Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901
MODEL G0748 VERTICAL MILL - VARIABLE SPEED
Product Dimensions:
Weight........................................................................................................................................................... 2,315 lbs.
Width (side-to-side) x Depth (front-to-back) x Height............................................................... 54 x 66-1/2 x 84-3/4 in.
Footprint (Length x Width)............................................................................................................................ 40 x 24 in.
Space Required for Full Range of Movement (Width x Depth).............................................................. 95 x 56-1/2 in.
Shipping Dimensions:
Type.......................................................................................................................................................... Wood Crate
Content........................................................................................................................................................... Machine
Weight............................................................................................................................................................ 2558 lbs.
Length x Width x Height....................................................................................................................... 54 x 55 x 78 in.
Must Ship Upright................................................................................................................................................... Yes
Electrical:
Power Requirement................................................................................................................... 220V, 3-Phase, 60 Hz
Prewired Voltage.................................................................................................................................................. 220V
Full-Load Current Rating....................................................................................................................................... 6.6A
Minimum Circuit Size.............................................................................................................................................. 15A
Connection Type....................................................................................................................................... Cord & Plug
Power Cord Included.............................................................................................................................................. Yes
Power Cord Length................................................................................................................................................. 6 ft.
Power Cord Gauge......................................................................................................................................... 14 AWG
Plug Included........................................................................................................................................................... No
Recommended Plug Type................................................................................................................................... 15-15
Switch Type........................................................................................................................... Forward/Reverse Switch
Recommended Phase Converter....................................................................................................................... G5845
Motors:
Main
Type........................................................................................................................................... AEVF Induction
Horsepower................................................................................................................................................ 3 HP
Phase.................................................................................................................................................... 3-Phase
Amps........................................................................................................................................................... 6.6A
Speed................................................................................................................................................ 1725 RPM
Power Transfer ............................................................................................................................... V-Belt Drive
Bearings..................................................................................................... Shielded & Permanently Lubricated
Model G0747/G0748 (Mfg. Since 8/12)
-9-
Main Specifications:
Operation Info
Spindle Travel.............................................................................................................................................. 5 in.
Max Distance Spindle to Column........................................................................................................ 24-3/8 in.
Max Distance Spindle to Table............................................................................................................ 16-7/8 in.
Longitudinal Table Travel (X-Axis)...................................................................................................... 29-7/8 in.
Cross Table Travel (Y-Axis)................................................................................................................ 15-3/4 in.
Vertical Table Travel (Z-Axis).................................................................................................................... 16 in.
Ram Travel................................................................................................................................................ 24 in.
Turret or Column Swivel (Left /Right)................................................................................................... 360 deg.
Head Tilt (Left/Right).............................................................................................................................. 90 deg.
Head Tilt (Front/Back)............................................................................................................................ 45 deg.
Drilling Capacity for Cast Iron................................................................................................................ 1-1/4 in.
Drilling Capacity for Steel............................................................................................................................ 1 in.
End Milling Capacity.................................................................................................................................... 1 in.
Face Milling Capacity................................................................................................................................... 3 in.
Table Info
Table Length.............................................................................................................................................. 50 in.
Table Width................................................................................................................................................ 10 in.
Table Thickness.................................................................................................................................. 3-5/16 in.
Number of T-Slots............................................................................................................................................ 3
T-Slot Size................................................................................................................................................ 5/8 in.
T-Slots Centers...................................................................................................................................... 2-1/2 in.
X/Y-Axis Travel per Handwheel Revolution.......................................................................................... 0.200 in.
Z-Axis Travel per Handwheel Revolution............................................................................................. 0.100 in.
Spindle Info
Spindle Taper............................................................................................................................................... R-8
Number of Vertical Spindle Speeds...................................................................................................... Variable
Range of Vertical Spindle Speeds............................................................................................. 60 – 4200 RPM
Quill Diameter.......................................................................................................................................... 86 mm
Quill Feed Rates.................................................................................................... 0.0015, 0.003, 0.008 in./rev.
Drawbar Thread Size............................................................................................................................. 7/16-20
Drawbar Length................................................................................................................................... 23-1/2 in.
Spindle Bearings....................................................................................................... Angular Contact Bearings
Construction
Spindle Housing/Quill....................................................................... Chrome-Plated & Precision-Ground Steel
Table..................................................................................................... Precision-Ground Meehanite Cast Iron
Head................................................................................................................................................... Aluminum
Column/Base...................................................................................................................... Meehanite Cast Iron
Base..................................................................................................................................................... Cast Iron
Paint....................................................................................................................................................... Enamel
Other Specifications:
Country Of Origin ............................................................................................................................................... China
Warranty ........................................................................................................................................................... 1 Year
Approximate Assembly & Setup Time .............................................................................................................. 1 Hour
Serial Number Location ............................................................................................................... ID Label on Column
ISO 9001 Factory .................................................................................................................................................. Yes
CSA Certified .......................................................................................................................................................... No
-10 -
Model G0747/G0748 (Mfg. Since 8/12)
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-
Model G0747/G0748 (Mfg. Since 8/12)
-11-
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 avoid
accidental slips, which could cause loss of workpiece control.
HAZARDOUS DUST. Dust created while using
machinery may cause cancer, birth defects, or
long-term respiratory damage. Be aware of dust
hazards associated with each workpiece material,
and 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.
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.
CHECK DAMAGED PARTS. Regularly inspect
machine for any condition that may affect safe
operation. Immediately repair or replace damaged
or mis-adjusted parts before operating machine.
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.
GUARDS & COVERS. Guards and covers reduce
accidental contact with moving parts or flying
debris. Make sure they are properly installed,
undamaged, and working correctly.
-12-
EXPERIENCING DIFFICULTIES. If at any time
you experience difficulties performing the intended operation, stop using the machine! Contact our
Technical Support at (570) 546-9663.
Model G0747/G0748 (Mfg. Since 8/12)
Additional Safety for Milling Machines
UNDERSTANDING CONTROLS: The mill is a
complex machine that presents severe cutting or
amputation hazards if used incorrectly. Make sure
you understand the use and operation of all controls before you begin milling.
SAFETY ACCESSORIES: Flying chips or debris
from the cutting operation can cause eye injury
or blindness. Always use safety glasses or a face
shield when milling.
WORK HOLDING: Milling a workpiece that is not
properly secured to the table or in a vise could
cause the workpiece to fly into the operator with
deadly force! Before starting the machine, be
certain the workpiece has been properly clamped
to the table. NEVER hold the workpiece by hand
during operation.
SPINDLE SPEED: To avoid tool or workpiece
breakage that could send flying debris at the
operator and bystanders, use the correct spindle
speed for the operation. Allow the spindle to gain
full speed before beginning the cut.
STOPPING SPINDLE: To reduce the risk of
hand injuries or entanglement hazards, DO NOT
attempt to stop the spindle with your hand or a
tool. Allow the spindle to stop on its own or use
the spindle brake.
CHIP CLEANUP: Chips from the operation are
sharp and hot, which can cause burns or cuts.
Using compressed air to clear chips could cause
them to fly into your eyes, and may drive them
deep into the working parts of the machine. Use
a brush or vacuum to clear away chips and debris
from machine or workpiece and NEVER clear
chips while spindle is turning.
MACHINE CARE & MAINTENANCE: Operating
the mill with excessively worn or damaged machine
parts increases risk of machine or workpiece
breakage which could eject hazardous debris at
the operator. Operating a mill in poor condition will
also reduce the quality of the results. To reduce
this risk, maintain the mill in proper working condition by ALWAYS promptly performing routine
inspections and maintenance.
SPINDLE DIRECTION CHANGE: Changing
spindle rotation direction while it is spinning
could lead to impact injury from broken tool or
workpiece debris, and workpiece or machine
damage. ALWAYS make sure the spindle is at a
complete stop before changing spindle direction.
Like all machinery there is potential danger
when operating this machine. Accidents
are frequently caused by lack of familiarity
or failure to pay attention. Use this machine
with respect and caution to decrease the
risk of operator injury. If normal safety precautions are overlooked or ignored, serious personal injury may occur.
CUTTING TOOL USAGE: Cutting tools have
very sharp leading edges—handle them with
care! Using cutting tools that are in good condition helps to ensure quality milling results and
reduces risk of personal injury from broken tool
debris. Inspect cutting tools for sharpness, chips,
or cracks before each use, and ALWAYS make
sure cutting tools are firmly held in place before
starting the machine.
No list of safety guidelines can be complete. Every shop environment is different.
Always consider safety first, as it applies
to your individual working conditions. Use
this and other machinery with caution and
respect. Failure to do so could result in
serious personal injury, damage to equipment, or poor work results.
Model G0747/G0748 (Mfg. Since 8/12)
-13-
SECTION 2: POWER SUPPLY
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.)
Availability
supply.
Full-Load Current Rating
Circuit Requirements for 220V
Nominal Voltage .............................. 220V/240V
Cycle .......................................................... 60 Hz
Phase .................................................... 3-Phase
Power Supply Circuit ......................... 15 Amps
Plug/Receptacle ............................NEMA 15 -15
property, consult an electrician if you are
unsure about wiring practices or electrical
codes in your area.
G0747 Full-Load Current Rating ....... 7.9 Amps
G0748 Full-Load Current Rating ....... 6.6 Amps
-14-
Model G0747/G0748 (Mfg. Since 8/12)
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.
Serious injury could occur if you connect
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
15-15 RECEPTACLE
15-15 PLUG
Current
Carrying
Grounding Prong
Prongs
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.
Extension Cords
Figure 1. Typical 15-15 plug and receptacle.
the machine to power before completing the
setup process. DO NOT connect to power
until instructed later in this manual.
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.
Model G0747/G0748 (Mfg. Since 8/12)
If you must use an extension
Minimum Gauge Size ...........................14 AWG
Maximum Length (Shorter is Better).......50 ft.
-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 (570) 546-9663
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
Unpacking
for advice.
SUFFOCATION HAZARD!
machine. Discard immediately.
Needed for Setup
The following are needed to complete the setup
process, but are not included with your machine.
For Lifting (Page 20)
• A forklift or other power lifting device rated for
25% more than the weight of the machine.
• Two lifting straps and chain with a safety
hook, each rated for 25% more than the
weight of the machine.
• At least two other persons to help with the
operation.
For Power Connection
• We recommend a qualified electrician to
ensure a safe and code-compliant connection to the power source. (Refer to Page 14
for details.)
For Assembly
• Cotton disposable rags
• Cleaner/degreaser (see Page 18)
• Safety glasses for each person
• Hex Wrench 4mm
• Open-End Wrench 14mm
-16 -
Model G0747/G0748 (Mfg. Since 8/12)
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.
A B
C
E
D
F
Small Item Inventory: (Figure 2) Qty
A. Front Way Cover .......................................... 1
B. Rear Way Cover ..........................................1
C. Drawbar
D. Ball Handles ................................................ 3
E. Fine Downfeed Handwheel ......................... 1
F. Ball Handle Handles .................................... 3
G. Toolbox ........................................................ 1
H. Bottle for Oil ................................................ 1
I. Belt Housing Safety Covers (G0747 Only) .. 2
J. Knee Crank .................................................1
K. Coarse Downfeed Lever ..............................1
L. Closed-End Wrench 17 x 19mm..................1
M. Phillips Screwdriver #2 ................................ 1
N. Slotted Screwdriver #2 ................................ 1
7
⁄16"-20 x 23 1⁄2 " ............................... 1
H
I
J
K
N
M
Figure 2. Small item inventory.
L
G
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.
Model G0747/G0748 (Mfg. Since 8/12)
-17-
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 preven
tative, but the following steps work well in a wide
variety of situations. Always follow the manufac
turer’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:
•
•
•
•
Basic steps for removing rust preventative:
1.
2.
3.
4.
metal protectant to prevent rust.
Gasoline or products
Many cleaning solvents
ed amounts are inhaled.
Avoid chlorine-based solvents, such as
Cleanup
with low flash points can
explode or cause fire if
used to clean machinery. Avoid cleaning with
these products.
are toxic if concentrat-
Disposable Rags
Cleaner/degreaser (WD•40 works well)
Safety glasses & disposable gloves
Plastic paint scraper (optional)
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.
-
-
Only work in a well-ventilated area.
NOTICE
acetone or brake parts cleaner, that may
damage painted surfaces. Test all cleaners
in an inconspicuous area before using to
make sure they will not damage paint.
T23692—Orange Power Degreaser
A great product for removing the waxy shipping
grease from your machine during clean up.
Repeat Steps 2–3 as necessary until clean,
then coat all unpainted surfaces with a quality
-18-
Figure 3. T23692 Orange Power Degreaser.
Model G0747/G0748 (Mfg. Since 8/12)
Site Considerations
Weight Load
Refer to the
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.
Physical Environment
Extreme conditions for this type of machinery are
range exceeds 20–95% (non-condensing); or the
Place this machine near an existing power source.
Shadows, glare, or strobe effects that may distract
Machine Data Sheet for the weight
Children or untrained people
may be seriously injured by
this machine. Only install in an
access restricted location.
Wall
30"
Minimum
Clearance
24"
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.
generally those where the ambient temperature
range exceeds 41°–104°F; the relative humidity
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
Minimum
Clearance
Lighting around the machine must be adequate
enough that operations can be performed safely.
or impede the operator must be eliminated.
Wall
30"
95"
Figure 4. Minimum working clearances.
Model G0747/G0748 (Mfg. Since 8/12)
40"
561⁄2"
-19 -
Lifting & Placing
get help from other people
HEAVY LIF T!
Straining or crushing injury
may occur from improperly
lifting machine or some of
its parts. To reduce this risk,
and use a fork lift (or other
lifting equipment) rated for
weight of this machine.
Power lifting equipment (refer to Page 16) and
at least two other people are required to lift and
place the mill.
To lift and move the mill:
Note: After re-positioning the ram and head-
stock, make sure they are locked in place to
prevent unexpected movement during lifting.
Make sure the four turret lock bolts (two on
either side of the ram, see Figure 6) are
torqued to 47 ft/lbs. to keep the ram from
unexpectedly moving from the force of the
lifting straps.
Turret Locking Bolts
(2 of 4)
1. Remove the crate from the shipping pallet,
then move the mill, while it is still on the pallet, to the installation location.
2. Rotate the ram 180° so the headstock is facing backwards (see Figure 5), then rotate the
head upright.
Refer to Head Movement on Page 29 and
Ram Movement on Page 31 for detailed
instructions to help with this step.
Figure 6. Locations of turret locking bolts.
3. Place the lifting straps under the ram and
connect them to the safety hook, as illustrated in Figure 5.
Note: Place protective material between the
straps and the mill to protect the ram and
ways, and to keep from cutting the lifting
straps.
4. Unbolt the mill from the shipping pallet.
5. With other people steadying the load to keep
it from swaying, lift the mill a couple of inches.
— If the mill tips to one side, lower it to the
ground and adjust the ram or table to balance the load. Make sure to re-tighten the
lock levers and bolts before lifting the mill
again.
Figure 5. Illustrated example of using lifting to
move the mill.
-20-
— If the mill lifts evenly, remove the shipping
pallet and lower the mill.
Model G0747/G0748 (Mfg. Since 8/12)
Leveling & Mounting
the floor if it is permanently connected
Generally, you can either bolt your machine to the
floor or mount it on machine mounts. Although
not required, we recommend that you secure the
machine to the floor and level it while doing so.
Because this is an optional step and floor materials may vary, hardware for securing the machine
to the floor is not included.
Unless otherwise specified by your local
codes, this machine MUST be secured to
(hardwired) to the power supply.
Bolting to Concrete Floors
Anchor studs and lag shield anchors with lag
screw (Figure 8) are two popular methods for
anchoring an object to a concrete floor. We suggest you research the many options and methods
for mounting your machine and choose the best
that fits your specific application
Anchor Stud
Lag Shield
Anchor
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 7 for an example of a high precision
level available from Grizzly.
Lag Screw
Figure 8. Typical fasteners for mounting to
concrete floors.
Machine Mounts
Machine mounts (see Figure 9 for an example)
provide the advantage of fast leveling and vibration reduction. The large size of the foot pads
distributes the weight of the machine to reduce
strain on the floor.
Figure 7. Example of a precision level
(Model H2683 shown).
Model G0747/G0748 (Mfg. Since 8/12)
Figure 9. Machine mount example.
-21-
Assembly
Assembly of the small components of the mill
consists of attaching the ball handles, knee crank,
and the way covers.
To assemble the mill:
4. Using the five cap screws pre-threaded into
the holes, install the front way cover as
shown in Figure 12.
1. Remove the hex nuts from the X- and
Y-axis leadscrews, then slide the ball handles
(Figure 10) onto the leadscrews and secure
them with the hex nuts.
Note: Tighten the hex nuts just until they are
snug. Overtightening could increase the wear
of the moving parts.
Ball Handle
Handle
Ball Handle
Figure 10. Ball handle assemblies.
Cap Screws
Figure 12. Front way cover installed.
5. Using the four cap screws pre-threaded into
the holes, install the rear way cover as shown
in Figure 13.
Cap
Screws
2. Thread the handles into the small end of the
ball handles and tighten them.
3. Slide the knee crank onto the shaft so that
the teeth of the crank and shaft engage, as
shown in Figure 11.
Knee Crank
Teeth Engaged
Figure 11. Knee crank teeth engaged.
Figure 13. Rear way cover installed.
Initial Lubrication
The machine was fully lubricated at the factory,
but we strongly recommend that before performing the Test Run you inspect all lubrication
points yourself and provide additional lubrication
if necessary. Refer to the Lubrication section on
Page 44 for specific details.
-22-
Model G0747/G0748 (Mfg. Since 8/12)
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