Grizzly G0758 Mill-Drill Manual

8/17/2019 Grizzly G0758 Mill-Drill Manual

1/52

MODEL G0758

MILL/DRILL

OWNER'S MANUAL(For models manufactured since 02/14)

COPYRIGHT © MAY, 2014 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.

#DM16290 PRINTED IN CHINA V1.05.14

Shown with Optional Stand(Model T26612)


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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 compre-

hension, application of safety devices, cutting/sanding/grinding toolintegrity, 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 equip-

ment, such as those dust masks that are specially designed to filter

out microscopic particles.


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Table of ContentsINTRODUCTION ............................................... 2

Machine Description ...................................... 2Contact Info.................................................... 2Manual Accuracy ........................................... 2Identification ................................................... 3

Controls & Components ................................. 4

SECTION 1: SAFETY ....................................... 7Safety Instructions for Machinery .................. 7Additional Safety for Mills/Drills ..................... 9

SECTION 2: POWER SUPPLY ...................... 10Availability .................................................................10Full-Load Current Rating ...........................................10110V Circuit Requirements .......................................10Grounding & Plug Requirements ..............................11Extension Cords ........................................................11

SECTION 3: SETUP ....................................... 12Needed for Setup ......................................... 12Unpacking .................................................... 12Inventory ...................................................... 13Cleanup ........................................................ 14Site Considerations ...................................... 15Lifting & Placing ........................................... 16Bench Mounting ........................................... 17Assembly ..................................................... 17Joining Drill Chuck & Arbor .......................... 18Lubricating Mill/Drill ...................................... 18Test Run ...................................................... 19

Spindle Break-In .......................................... 20Inspections & Adjustments .......................... 20

SECTION 4: OPERATIONS ........................... 21Operation Overview ..................................... 21Downfeed Controls ...................................... 22

Identification ..............................................................22Using DRO ................................................................22Using Coarse Downfeed ...........................................22Using Fine Downfeed ................................................22

Headstock Movement .................................. 23Raising/Lowering Headstock .....................................23

Tilting Headstock .......................................................23Table Travel ................................................. 24

Graduated Dials ........................................................24X-Axis Handwheel .....................................................24Y-Axis Handwheel .....................................................24

Installing/Removing Tooling ......................... 25Installing Tooling .......................................................25Removing Tooling .....................................................26

Spindle Speed.............................................. 26Determining Spindle Speed ......................................26

SECTION 5: ACCESSORIES ......................... 27

SECTION 6: MAINTENANCE ......................... 28Schedule ...................................................... 28Cleaning and Protecting .............................. 28

Lubrication ................................................... 28Table and Column Ways ...........................................29Z-Axis Leadscrews ....................................................29Table Leadscrews .....................................................30Headstock Gears ......................................................30Quill Outside Surface ................................................31Quill Rack .................................................................31

Replacing DRO Battery ............................... 31

SECTION 7: SERVICE ................................... 32Troubleshooting ........................................... 32Adjusting Gibs .............................................. 34Adjusting Leadscrew Backlash .................... 34Brush Replacement ..................................... 35

SECTION 8: WIRING ...................................... 36Wiring Safety Instructions ............................ 36G0758 Wiring Overview ............................... 37G0758 Wiring ............................................... 38

SECTION 9: PARTS ....................................... 40Column ......................................................... 40Electrical Box ............................................... 42Headstock .................................................... 43Chip Guard................................................... 45

Labels & Cosmetics ..................................... 46WARRANTY & RETURNS ............................. 49


4/52-2- Model G0758 (Mfd. Since 2/14)

INTRODUCTION

The Model G0758 is a high-precision mill/drill witha 600 Watt (3 ⁄ 4 HP) high-torque, low noise motor,with low speed gearing for maximum torque in thelowest RPM range.

This mill/drill has a spindle-to-table distance of 9"with a 131 ⁄ 4" swing. It has an R-8 spindle size andfeatures manual downfeed controls with a variablespindle speed range from 50–2000 RPM. DRO'sfor both the spindle speed and spindle downfeedstroke allow precise operation. The headstock tilts

45° left/right and moves in the Z-axis along dove-tailed ways for maximum precision.

The large 51 ⁄ 2" x 1911 ⁄ 16" table features manual 13"(X-axis) and 51 ⁄ 2" (Y-axis) travel. All table move-ment is along precision-ground dovetailed ways.An optional stand (Model T26612) is available forpurchase at www.grizzly.com.

Machine Description

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

We made every effort to be exact with the instruc-tions, specifications, drawings, and photographscontained inside. Sometimes we make mistakes,but our policy of continuous improvement alsomeans that sometimes the machine you receivewill be slightly different than what is shown inthe manual.

If you find this to be the case, and the differencebetween the manual and machine leaves youconfused about a procedure, check our websitefor an updated version. We post current manualsand manual updates for free on our website atwww.grizzly.com.

Alternatively, you can call our Technical Supportfor help. Before calling, please write down theManufacture Date and Serial Number stampedinto the machine ID label (see below). This infor-mation helps us determine if updated documenta-

tion is available for your machine.

Manufacture Date

Serial Number

Manual Accuracy

We stand behind our machines. If you haveany questions or need help, use the informationbelow to contact us. Before contacting, please getthe serial number and manufacture date of yourmachine. This will help us help you faster.

Grizzly Technical Support1203 Lycoming Mall Circle

Muncy, PA 17756Phone: (570) 546-9663

Email: [email protected]

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

Grizzly Documentation ManagerP.O. Box 2069

Bellingham, WA 98227-2069Email: [email protected]

Contact Info


5/52Model G0758 (Mfd. Since 2/14) -3-

Figure 2. Right side identification.

Figure 1. Front identification.

Identification

Z-AxisHandwheel

High/LowGearbox Knob

WorkTable

Motor

CoarseDownfeedHandles

Z-Axis Lock Levers

Quill Lock Lever

DownfeedSelector

Knob

X-AxisHandwheel

ChipGuard

FineDownfeedHandwheel

Variable-SpeedKnob

ON/OFFButtons

Drawbar Cap

Y-Axis LockLevers

Spindle SpeedDigital Readout Unit

(DRO)

Spindle PositionDigital Readout Unit

(DRO)

Become familiar with the names and locations of the controls and features shown below to better understandthe instructions in this manual.

Y-AxisHandwheel

Table Stop

X-AxisLock

Levers


6/52-4- Model G0758 (Mfd. Since 2/14)

Controls &Components

A. High/Low Gearbox Knob: Selects low gear"L" for maximum torque from 50–1000 RPM,or high gear "H" for 100–2000 RPM.

B. Drawbar Cap/Drawbar: Drawbar securescollets and tooling in the spindle.

C. Z-Axis Handwheel: Raises and lowers head-

stock.

D. Z-Axis Travel Locks: Locks position ofheadstock to column.

E. Downfeed Selector Knob: Selects betweenfine and coarse vertical quill travel.

Figure 3. G0758 controls (right side).

Figure 4. G0758 controls (front side).CBA

D

EF

G

H. Variable-Speed Knob: Controls spindlespeed.

I. Variable-Speed Digital Readout Unit(DRO): Displays spindle speed.

J. ON Button: Supplies power for spindle rota-tion.

K. OFF Button: Disconnects power for spindle

rotation.

L. Spindle Downfeed Digital Readout Unit(DRO): Displays a precise reading of verti-cal positioning of spindle. It can be zeroedat any position and manually increased ordecreased independent of spindle positionwhen operation requires it.

M. Quill Lock Lever: Locks vertical position ofquill when tightened.

H

I

J

K

L

M

Refer to Figures 3 & 4 and the following descrip-tions to become familiar with the basic controls ofthis machine.

To reduce your risk ofserious injury, read thisentire manual BEFOREusing machine.

F. Coarse Downfeed Handle: Provides coarsecontrol over vertical quill travel.

G. Fine Downfeed Handwheel: Provides finecontrol over vertical quill travel.


7/52Model G0758 (Mfd. Since 2/14) -5-

MACHINE DATASHEET

Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901

MODEL G0758 MILL/DRILL

Product Dimensions:

Weight.............................................................................................................................................................. 161 lbs.

Width (side-to-side) x Depth (front-to-back) x Height...............................................................19-3/4 x 21 x 30-1/4 in.

Footprint (Length x Width)............................................................................................................... 16-1/2 x 15-3/4 in.

Shipping Dimensions:

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

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

Weight.............................................................................................................................................................. 176 lbs.

Length x Width x Height....................................................................................................................... 24 x 22 x 32 in.

Electrical:

Power Requirement........................................................................................................... 110V, Single-Phase, 60 Hz

Full-Load Current Rating........................................................................................................................................ 10A

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

Connection Type....................................................................................................................................... Cord & Plug

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

Power Cord Length................................................................................................................................................. 5 ft.

Power Cord Gauge......................................................................................................................................... 16 AWG

Plug Included..........................................................................................................................................................Yes

Included Plug Type................................................................................................................................................ 5-15

Switch Type........................................................................................... ON/OFF Push Button Switch w/Safety Cover

Motors:

Main

Type......................................................................................................................................... High-Torque DCHorsepower................................................................................................................................ 600W (3/4 HP)

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

Amps............................................................................................................................................................ 10A

Speed................................................................................................................................................ 4500 RPM

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

Bearings....................................................................................................... Shielded and Permanently Sealed

Main Specifications:

Operation Info

Spindle Travel.............................................................................................................................................. 2 in.

Max Distance Spindle to Column.......................................................................................................... 6-5/8 in.

Max Distance Spindle to Table.................................................................................................................... 9 in.

Longitudinal Table Travel (X-Axis)............................................................................................................. 13 in.

Cross Table Travel (Y-Axis).................................................................................................................. 5-1/2 in.

Vertical Head Travel (Z-Axis)................................................................................................................ 8-1/4 in.

Head Tilt (Left/Right)........................................................................................................ Left 45, Right 45 deg.

Drilling Capacity for Cast Iron................................................................................................................... 5/8 in.

Drilling Capacity for Steel......................................................................................................................... 1/2 in.

End Milling Capacity................................................................................................................................. 5/8 in.

Face Milling Capacity................................................................................................................................... 2 in.


8/52-6- Model G0758 (Mfd. Since 2/14)

Table Info

Table Length.................................................................................................................................... 19-11/16 in.

Table Width........................................................................................................................................... 5-1/2 in.

Table Thickness.................................................................................................................................... 1-7/8 in.

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

T-Slot Size................................................................................................................................................ 3/8 in.

T-Slots Centers...................................................................................................................................... 1-1/2 in.

Spindle InfoSpindle Taper............................................................................................................................................... R-8

Number of Vertical Spindle Speeds...................................................................................................... Variable

Range of Vertical Spindle Speeds............................................................................................... 50–2000 RPM

Quill Diameter......................................................................................................................................... 2.36 in.

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

Drawbar Length..................................................................................................................................... 9-7/8 in.

Spindle Bearings......................................................................................................... Tapered Roller Bearings

Construction

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

Table.................................................................................................................................................... Cast Iron

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

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

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

Other

Optional Stand........................................................................................................................................ T26612

Other Specifications:

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

Warranty ........................................................................................................................................................... 1 Year

Serial Number Location .................................................................................................................................. ID Label

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

CSA, ETL, or UL Certified/Listed ............................................................................................................................ No

Features:

Dovetail headstock column and table waysHigh-torque, low-noise DC motor

Variable-speed spindle with DRO

Spindle elevation DRO

3-Axis precision handwheel control

Coarse and fine spindle downfeed

2-Speed gearbox

Zero-setting dials on handwheels

Handwheel dials feature 0.002" graduations

Accessories Included:

Drill chuck 3-16mm with B16 taper

Drill chuck arbor B16 x R8

Open-ended and hex wrenchesToolbox


9/52Model G0758 (Mfd. Since 2/14) -7-

ELECTRICAL EQUIPMENT INJURY RISKS. Youcan be shocked, burned, or killed by touching liveelectrical components or improperly groundedmachinery. To reduce this risk, only allow qualifiedservice personnel to do electrical installation orrepair work, and always disconnect power beforeaccessing or exposing electrical equipment.

DISCONNECT POWER FIRST. Always discon-nect machine from power supply BEFORE makingadjustments, changing tooling, or servicing machine.This prevents an injury risk from unintended startupor contact with live electrical components.

EYE PROTECTION. Always wear ANSI-approvedsafety glasses or a face shield when operating orobserving machinery to reduce the risk of eyeinjury or blindness from flying particles. Everydayeyeglasses are NOT approved safety glasses.

OWNER’S MANUAL. Read and understand thisowner’s manual BEFORE using machine.

TRAINED OPERATORS ONLY. Untrained oper-ators have a higher risk of being hurt or killed.Only allow trained/supervised people to use thismachine. When machine is not being used, dis-connect power, remove switch keys, or lock-outmachine to prevent unauthorized use—especiallyaround children. Make workshop kid proof!

DANGEROUS ENVIRONMENTS. Do not usemachinery in areas that are wet, cluttered, or havepoor lighting. Operating machinery in these areasgreatly increases the risk of accidents and injury.

MENTAL ALERTNESS REQUIRED. Full mentalalertness is required for safe operation of machin-ery. Never operate under the influence of drugs oralcohol, when tired, or when distracted.

For Your Own Safety, Read Instruction

Manual Before Operating This MachineThe 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 impor-tance of the safety messages. The progression of symbols is described below. Remember thatsafety messages by themselves do not eliminate danger and are not a substitute for properaccident prevention measures. Always use common sense and good judgment.

Indicates a potentially hazardous situation which, if not avoided,

MAY result in minor or moderate injury. It may also be used to alertagainst unsafe practices.

Indicates a potentially hazardous situation which, if not avoided,

COULD result in death or serious injury.

Indicates an imminently hazardous situation which, if not avoided,

WILL result in death or serious injury.

This symbol is used to alert the user to useful information aboutproper operation of the machine.NOTICE

Safety Instructions for Machinery

SECTION 1: SAFETY


10/52-8- Model G0758 (Mfd. Since 2/14)

WEARING PROPER APPAREL. Do not wearclothing, apparel or jewelry that can becomeentangled in moving parts. Always tie back orcover long hair. Wear non-slip footwear to avoidaccidental slips, which could cause loss of work-piece control.

HAZARDOUS DUST. Dust created while usingmachinery may cause cancer, birth defects, orlong-term respiratory damage. Be aware of dusthazards associated with each workpiece material,and always wear a NIOSH-approved respirator toreduce your risk.

HEARING PROTECTION. Always wear hear-ing protection when operating or observing loudmachinery. Extended exposure to this noise

without hearing protection can cause permanenthearing loss.

REMOVE ADJUSTING TOOLS. Tools left onmachinery can become dangerous projectilesupon startup. Never leave chuck keys, wrenches,or any other tools on machine. Always verifyremoval before starting!

USE CORRECT TOOL FOR THE JOB. Only usethis tool for its intended purpose—do not forceit or an attachment to do a job for which it was

not designed. Never make unapproved modifica-tions—modifying tool or using it differently thanintended may result in malfunction or mechanicalfailure that can lead to personal injury or death!

AWKWARD POSITIONS. Keep proper footingand balance at all times when operating machine.Do not overreach! Avoid awkward hand positionsthat make workpiece control difficult or increasethe 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 reduceaccidental contact with moving parts or flyingdebris. Make sure they are properly installed,undamaged, and working correctly.

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

NEVER STAND ON MACHINE. Serious injurymay occur if machine is tipped or if the cuttingtool is unintentionally contacted.

STABLE MACHINE. Unexpected movement dur-ing operation greatly increases risk of injury orloss of control. Before starting, verify machine isstable and mobile base (if used) is locked.

USE RECOMMENDED ACCESSORIES. Consultthis owner’s manual or the manufacturer for rec-ommended accessories. Using improper acces-sories will increase the risk of serious injury.

UNATTENDED OPERATION. To reduce therisk of accidental injury, turn machine OFF andensure all moving parts completely stop beforewalking away. Never leave machine runningwhile unattended.

MAINTAIN WITH CARE. Follow all maintenanceinstructions and lubrication schedules to keepmachine in good working condition. A machinethat is improperly maintained could malfunction,leading to serious personal injury or death.

CHECK DAMAGED PARTS. Regularly inspectmachine for any condition that may affect safeoperation. Immediately repair or replace damagedor mis-adjusted parts before operating machine.

MAINTAIN POWER CORDS. When disconnect-ing cord-connected machines from power, graband pull the plug—NOT the cord. Pulling the cordmay damage the wires inside. Do not handlecord/plug with wet hands. Avoid cord damage bykeeping it away from heated surfaces, high traffic

areas, harsh chemicals, and wet/damp locations.

EXPERIENCING DIFFICULTIES. If at any timeyou experience difficulties performing the intend-ed operation, stop using the machine! Contact ourTechnical Support at (570) 546-9663.


11/52Model G0758 (Mfd. Since 2/14) -9-

Additional Safety for Mills/Drills

Like all machinery there is potential danger when operating this machine. Accidents are fre-quently caused by lack of familiarity or failure to pay attention. Use this machine with respectand caution to lessen the possibility of operator injury. If normal safety precautions are over-looked or ignored, serious personal injury may occur.

UNDERSTAND ALL CONTROLS. Make sure youunderstand the function and proper use of all con-trols before starting. This will help you avoid mak-ing mistakes that result in serious injury.

WEAR FACE SHIELD. Always wear a face shieldin addition to safety glasses. This provides morecomplete protection for your face than safety

glasses alone.

REMOVE CHUCK KEY & SPINDLE TOOLS. Always remove chuck key, drawbar wrench, andother tools used on the spindle immediately afteruse. This will prevent them from being thrown bythe spindle upon startup.

PROPERLY SECURE CUTTER. Firmly securecutting tool or drill bit so it does not fly out of spin-dle during operation.

USE CORRECT SPINDLE SPEED. Follow rec-ommended speeds and feeds for each size andtype of cutting tool. This helps ensure best cuttingresults and avoid tool breakage during operation.

INSPECT CUTTING TOOL. Inspect cutting toolsfor sharpness, chips, or cracks before each use.Replace dull, chipped, or cracked cutting toolsimmediately.

ALLOW SPINDLE TO STOP. To minimize your

risk of entanglement, always allow spindle to stopon its own. DO NOT stop spindle using your handor any other object.

The primary risks of operating a Mill/Drill are as follows: You can be seriously injured or killedby getting clothing, jewelry, or long hair entangled with rotating cutter. You can be severely cutor your fingers can be amputated by contacting the rotating cutter. You can be blinded or struck

with great force by broken cutting tools, metal chips, workpieces, or adjustment tools thrownfrom the rotating spindle. To reduce your risk of serious injury when operating this machine,completely heed and understand the following:

SECURE WORKPIECE TO TABLE. Clampworkpiece to table or secure in a vise mounted totable, so workpiece cannot unexpectedly shift orspin during operation. NEVER hold workpiece byhand during operation.

CLEAN MACHINE SAFELY. Metal chips or shav-ings can be razor sharp. DO NOT clear chips

by hand or compressed air that can force chipsfarther into machine—use a brush or vacuuminstead. Never clear chips while spindle is turning.

PROPERLY MAINTAIN MACHINE. Keep machinein proper working condition to help ensure that itfunctions safely and all guards and other compo-nents work as intended. Perform routine inspec-tions and all necessary maintenance. Never oper-ate machine with damaged or worn parts that canbreak or result in unexpected movement duringoperation.

DISCONNECT POWER FIRST. To reduce risk ofelectrocution or injury from unexpected startup,make sure mill/drill is turned OFF , disconnectedfrom power, and all moving parts have come toa complete stop before changing cutting tools orstarting any inspection, adjustment, or mainte-nance procedure.

POWER DISRUPTION. In the event of a localpower outage during operation, turn spindle switch

OFF to avoid a possible sudden startup oncepower is restored.


12/52-10- Model G0758 (Mfd. Since 2/14)

SECTION 2: POWER SUPPLY

AvailabilityBefore installing the machine, consider the avail-ability and proximity of the required power supply

circuit. If an existing circuit does not meet therequirements for this machine, a new circuit mustbe installed. To minimize the risk of electrocution,fire, or equipment damage, installation work andelectrical wiring must be done by an electrician orqualified service personnel in accordance with allapplicable codes and standards.

Electrocution, fire, or

equipment damage mayoccur if machine is notcorrectly grounded andconnected to the powersupply.

Full-Load Current RatingThe full-load current rating is the amperage amachine draws at 100% of the rated output power.On machines with multiple motors, this is theamperage drawn by the largest motor or sum of allmotors and electrical devices that might operateat one time during normal operations.

Full-Load Current Rating at 110V........8 Amps

The full-load current is not the maximum amountof amps that the machine will draw. If the machineis overloaded, it will draw additional amps beyondthe full-load rating.

If the machine is overloaded for a sufficient lengthof time, damage, overheating, or fire may result—

especially if connected to an undersized circuit.To reduce the risk of these hazards, avoid over-loading the machine during operation and makesure it is connected to a power supply circuit thatmeets the specified circuit requirements.

For your own safety and protection ofproperty, consult an electrician if you areunsure about wiring practices or electricalcodes in your area.

Note: Circuit requirements in this manual apply toa dedicated circuit—where only one machine willbe running on the circuit at a time. If machine willbe connected to a shared circuit where multiplemachines may be running at the same time, consult an electrician or qualified service personnel toensure circuit is properly sized for safe operation.

A power supply circuit includes all electricalequipment between the breaker box or fuse panelin the building and the machine. The power sup-ply circuit used for this machine must be sized tosafely handle the full-load current drawn from themachine for an extended period of time. (If thismachine is connected to a circuit protected byfuses, use a time delay fuse marked D.)

110V Circuit RequirementsThis machine is prewired to operate on a powersupply circuit that has a verified ground and meetsthe following requirements:

Nominal Voltage .................... 110V, 115V, 120VCycle ..........................................................60 Hz

Phase ........................................... Single-PhasePower Supply Circuit ......................... 15 Amps

Serious injury could occur if you connectthe machine to power before completing thesetup process. DO NOT connect to poweruntil instructed later in this manual.


13/52Model G0758 (Mfd. Since 2/14) -11-

Improper connection of the equipment-grounding

wire can result in a risk of electric shock. Thewire with green insulation (with or without yellowstripes) is the equipment-grounding wire. If repair

or replacement of the power cord or plug is nec-essary, do not connect the equipment-groundingwire to a live (current carrying) terminal.

Check with a qualified electrician or service per-sonnel if you do not understand these groundingrequirements, or if you are in doubt about whetherthe tool is properly grounded. If you ever notice

that a cord or plug is damaged or worn, discon-nect it from power, and immediately replace it witha new one.

Extension CordsWe do not recommend using an extension cordwith this machine. If you must use an extension

cord, only use it if absolutely necessary and onlyon a temporary basis.

Extension cords cause voltage drop, which maydamage electrical components and shorten motorlife. 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 mustcontain a ground wire, match the required plug

and receptacle, and meet the following require-ments:

Minimum Gauge Size ...........................16 AWGMaximum Length (Shorter is Better).......50 ft.

Grounding & Plug Requirements

Figure 5. Typical 5-15 plug and receptacle.

Grounding Prong

Neutral Hot

5-15 PLUG

GROUNDED

5-15 RECEPTACLE

SHOCK HAZARD!Two-prong outlets do not meet the groundingrequirements for this machine. Do not modifyor use an adapter on the plug provided—ifit will not fit the outlet, have a qualifiedelectrician install the proper outlet with averified ground.

This machine MUST be grounded. In the eventof certain malfunctions or breakdowns, grounding

reduces the risk of electric shock by providing apath of least resistance for electric current.

This machine is equipped with a power cord that

has an equipment-grounding wire and a ground-ing plug (similar to the figure below). The plugmust only be inserted into a matching receptacle(outlet) that is properly installed and grounded in

accordance with all local codes and ordinances.


14/52-12- Model G0758 (Mfd. Since 2/14)

The following are needed to complete the setupprocess, but are not included with machine.

Description Qty• Additional People ....................................... 1• Safety Glasses ........................................... 1• Cleaner/Degreaser (Page 14) .... As Needed• Disposable Shop Rags ............... As Needed• Forklift ......................................................... 1• Lifting Sling (rated for at least 300 lbs.) ...... 1• Mounting Hardware (Page 17) ... As Needed

• Brass Hammer (Page 26) .......................... 1• Mineral Spirits (Page 18) ............ As Needed• Wood Block (Page 18) ............................... 1

Needed for Setup

SECTION 3: SETUP

Your machine was carefully packaged for safetransportation. Remove the packaging materialsfrom around your machine and inspect it. If you

discover any damage, please call us immediatelyat (570) 546-9663 for advice.

Save the containers and all packing materials forpossible inspection by the carrier or its agent.Otherwise, filing a freight claim can be difficult.

When you are completely satisfied with the condi-tion of your shipment, inventory the contents.

Unpacking

SUFFOCATION HAZARD!Keep children and pets awayfrom plastic bags or packingmaterials shipped with thismachine. Discard immediately.

This machine presents

serious injury hazardsto untrained users. Readthrough this entire manu-al to become familiar withcontrols and operationsbefore starting machine!

Wear safety glasses duringentire setup process!

HEAVY LIFT!Straining or crushing injurymay occur from improperlylifting machine or some ofits parts. To reduce this risk,get help from other peopleand use a forklift (or otherlifting equipment) rated for

weight of this machine.

Keep hair, clothing, andjewelry away from mov-ing parts at all times.Entanglement can resultin death, amputation, orsevere crushing injuries!


15/52Model G0758 (Mfd. Since 2/14) -13-

Figure 6. Inventory included with machine.

K

A

CD

E

G

B

I

J

L

M

F H

NOTICE If you cannot find an item on this list, care-fully check around/inside the machine andpackaging materials. Often, these items getlost in packaging materials while unpack-

ing or they are pre-installed at the factory.

Inventory

The following is a list of items shipped with yourmachine. Before beginning setup, lay these itemsout and inventory them.

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

Inventory (Figure 6) QtyA. Handwheel Handles w/Screws ................... 3B. Bottle for Oil ............................................... 1C. Toolbox ....................................................... 1D. Drill Chuck Arbor R-8 x B-16 ...................... 1E. Standard Screwdriver ................................. 1F. Phillips Screwdriver .................................... 1G. Spindle Pin ................................................. 1

H. Open-End Wrench 8/10mm ........................ 1I. Open-End Wrench 12/14mm ...................... 1J. Open-End Wrench 17/19mm ...................... 1K. Drill Chuck 3–16mm w/Chuck Key ............. 1L. T-Bolt M8-1.25 x 55 Assemblies ................. 2M. Hex Wrenches 2.5, 3, 4, 5, 6mm ......1 Each


16/52-14- Model G0758 (Mfd. Since 2/14)

The unpainted surfaces of your machine arecoated with a heavy-duty rust preventative thatprevents 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 yourmachine. The time you spend doing this now willgive you a better appreciation for the proper careof your machine's unpainted surfaces.

There are many ways to remove this rust preven-tative, but the following steps work well in a widevariety of situations. Always follow the manufac-turer’s instructions with any cleaning product youuse 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. Put on safety glasses.

2. Coat the rust preventative with a liberalamount of cleaner/degreaser, then let it soakfor 5–10 minutes.

3. Wipe off the surfaces. If your cleaner/degreas-er is effective, the rust preventative will wipeoff easily. If you have a plastic paint scraper,scrape off as much as you can first, then wipeoff the rest with the rag.

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

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

Gasoline and petroleumproducts have low flashpoints and can explodeor cause fire if used toclean machinery. Avoid

using these productsto clean machinery.

Many cleaning solventsare toxic if inhaled. Onlywork in a well-ventilatedarea.

NOTICE Avoid chlorine-based solvents, such asacetone or brake parts cleaner, that maydamage painted surfaces.

T23692—Orange Power DegreaserA great product for removing the waxy shippinggrease from machine during clean up.

Figure 7. T23692 Orange Power Degreaser.

Cleanup


17/52Model G0758 (Mfd. Since 2/14) -15-

Site Considerations

Weight LoadRefer to the Machine Data Sheet for the weightof your machine. Make sure that the surface upon

which the machine is placed will bear the weightof the machine, additional equipment that may beinstalled on the machine, and the heaviest work-piece that will be used. Additionally, consider theweight of the operator and any dynamic loadingthat may occur when operating the machine.

Space AllocationConsider the largest size of workpiece that willbe processed through this machine and provideenough space around the machine for adequate

operator material handling or the installation ofauxiliary equipment. With permanent installations,leave enough space around the machine to openor remove doors/covers as required by the main-tenance and service described in this manual.See below for required space allocation.

Physical EnvironmentThe physical environment where the machine isoperated is important for safe operation and lon-

gevity of machine components. For best results,operate this machine in a dry environment that isfree from excessive moisture, hazardous chemi-cals, airborne abrasives, or extreme conditions.Extreme conditions for this type of machinery aregenerally those where the ambient temperaturerange exceeds 41°–104°F; the relative humidityrange exceeds 20%–95% (non-condensing); orthe environment is subject to vibration, shocks,or bumps.

Electrical InstallationPlace this machine near an existing power source.Make sure all power cords are protected fromtraffic, material handling, moisture, chemicals, orother hazards. Make sure to leave enough spacearound machine to disconnect power supply orapply a lockout/tagout device, if required.

LightingLighting around the machine must be adequateenough that operations can be performed safely.

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

Children or untrained peoplemay be seriously injured bythis machine. Only install in an

access restricted location.

301 / 4"

193 / 4"

21"

Figure 8. G0758 working clearances.


18/52-16- Model G0758 (Mfd. Since 2/14)

Lifting & Placing

HEAVY LIFT!Straining or crushing injurymay occur from improperlylifting machine or some ofits parts. To reduce this risk,

get help from other peopleand use a forklift (or otherlifting equipment) rated forweight of this machine.

Figure 10. Headstock positioned for lifting.

3. Hang sling from forklift fork and place it underheadstock, as shown in Figure 10. DO NOT place sling over any controls or against anycomponents that may be damaged from theforce required for lifting.

4. Unbolt machine from pallet. Have an assis-tant on the ground steady machine to preventit from swinging and lift it slightly off the palletwith forklift.

5. Carefully place machine onto workbench oroptional stand.

6. Mount machine to workbench followinginstructions in Bench Mounting on Page17 or to stand following instructions included

with stand.

VerticalHandwheel

LiftingSling

To lift machine and place it in position:

1. Place shipping crate next to workbench (orstand) where machine will be placed.

2. Use vertical handwheel to raise headstock asfar as possible (see Figure 10). Lock head-stock in place to avoid sudden shifts during

lifting.

The Model G0758 mill/drill can be mounted to aworkbench or the Model T26612 optional stand(see Figure 9). The optional stand is specificallydesigned for Model G0758 and comes with pre-

drilled mounting holes.

Figure 9. Model T26612 optional stand forModel G0758.


19/52Model G0758 (Mfd. Since 2/14) -17-

Figure 12. Example of a "Direct Mount" setup.

Machine Base

Workbench

Lag Screw

Flat Washer

Another option is a "Direct Mount" (see examplebelow) where the machine is secured directly tothe workbench with lag screws and washers.

Figure 11. Example of a "Through Mount" setup.

Assembly

Except for the handwheel handles, the mill/drillwas fully assembled at the factory.

Use a standard screwdriver to attach handwheel

handles (see Figures 13–14).

Figure 13. X- and Y-axis handwheel handlesattached.

Table HandwheelHandles

Figure 14. Z-axis handwheel handle attached.

Vertical Handwheel Handle

Number of Mounting Holes ............................ 4Diameter of Mounting Hardware ................. 1 ⁄ 2"

Bench Mounting

The base of this machine has mounting holes

that allow it to be fastened to a workbench orother mounting surface to prevent it from movingduring operation and causing accidental injury ordamage.

The strongest mounting option is a "ThroughMount" (see example below) where holes aredrilled all the way through the workbench—andhex bolts, washers, and hex nuts are used tosecure the machine in place.

Machine Base

Workbench

Hex

Bolt

Flat Washer

Flat Washer

Lock Washer

Hex Nut


20/52-18- Model G0758 (Mfd. Since 2/14)

A B-16 x R8 arbor is included for the drill chuckthat comes with this machine. The following pro-

cedure describes how to install the arbor in thechuck.

After the arbor is installed in the drill chuck, itis very difficult to separate the assembly. If youwould like to use a different chuck in the future,we recommend getting a new arbor for that chuck.

Important: DO NOT install the drill chuck andarbor into the spindle until AFTER the test run.

To join drill chuck and arbor:

1. Use mineral spirits to clean drill chuck andarbor mating surfaces, especially the bore.

2. Retract chuck jaws completely into chuck.

3. Insert small end of arbor into chuck.

4. Hold assembly by arbor and tap chuck ontoa block of wood with medium force, as illus-trated in Figure 15.

Joining Drill Chuck& Arbor

Figure 15. Tapping drill chuck/arbor on block ofwood.

5. Attempt to separate drill chuck and arbor byhand. If you can pull them apart, repeat thisprocedure.

The lubrication procedures highlighted in theLubrication subsection of SECTION 6:MAINTENANCE must be completed before per-forming the test run or spindle break-in.

Lubricating Mill/Drill

Damage caused by running the mill/drillwithout first properly lubricating headstockgears will not be covered under warranty.

Note: Refer to Installing/Removing Tooling section on Page 25 for installing arbor into spindleinstructions.


21/52Model G0758 (Mfd. Since 2/14) -19-

3. Rotate variable-speed knob to lowest setting.

4. Rotate high/low gearbox knob to low "L" gearsetting (see Figure 17).

Note: When switching between gears, it maybe necessary to rotate spindle by hand sogears will align and engage.

Figure 16. Location of mill/drill controls (front).

Figure 17. Gearbox knob rotated to low setting.

High/LowGearbox

Knob

OFF Button

ON Button

Variable-SpeedKnob

Test Run

Once assembly is complete, test run the machineto ensure it is properly connected to power andsafety components are functioning properly.

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

DO NOT start machine until all precedingsetup instructions have been performed.Operating an improperly set up machinemay result in malfunction or unexpect-ed results that can lead to serious injury,death, or machine/property damage.

Serious injury or death can result fromusing this machine BEFORE understandingits controls and related safety information.

DO NOT operate, or allow others to operate,machine until the information is understood.

To test run mill/drill:

1. Make sure all tools and objects used duringsetup are cleared away from machine.

2. Press OFF button (see Figure 16). Thiswill help prevent unexpected startup whenmachine is connected to power.

5. Connect mill/drill to power supply.

6. Press ON button. Spindle should begin torotate clockwise (as viewed from top), andmachine should run smoothly with little or novibration or rubbing noises.

7. Press OFF button.

8. Open chip guard half way and press ON but-ton. Machine should not start.

—If machine does start (with chip guardopened half way), press OFF button andimmediately disconnect power to machine.The chip guard safety feature is not work-ing correctly. This safety feature mustwork properly before proceeding with regu-

lar operations. Refer to Troubleshooting table in this manual.

Congratulations! The Test Run is complete.Continue to Spindle Break-In.


22/52-20- Model G0758 (Mfd. Since 2/14)

Spindle Break-In 6. Rotate variable-speed knob to 100 RPM andhigh/low gearbox knob to high "H".7. Press ON button.

8. Run machine for a minimum of 10 minutes.

9. Without stopping spindle, use variable-speed

knob to run machine at 1000 and 2000 RPMfor 10 minutes each.


The spindle break-in of the machine is nowcomplete!

The spindle break-in procedure distributes lubri-cation throughout the bearings to reduce the riskof early bearing failure if there are any "dry" spotsor areas where lubrication has settled in the bear-

ings. You must complete this procedure before placing operational loads on the spindle for thefirst time when the machine is new or if it hasbeen sitting idle for longer than 6 months.

Always start the spindle break-in at the lowestspeed to minimize wear if there are dry spots.Allow the spindle to run long enough to warm upand distribute the bearing grease, then incremen-tally increase spindle speeds, allowing the spindleto run the same amount of time at each speed, untilreaching the maximum spindle speed. Following

the break-in procedure in this progressive man-ner helps minimize any potential wear that couldoccur until lubrication is fully distributed.

You must complete this procedure to main-tain the warranty. Failure to do this couldcause rapid wear-and-tear of spindle bear-ings once they are placed under load.

Inspections &

AdjustmentsThe following adjustments were performed at thefactory before the machine was shipped:

• Gib Adjustments ............................. Page 34• Leadscrew Backlash Adjustments .................................... Page 34

Be aware that these can change during theshipping process. Pay careful attention to these

adjustments when first operating the machine. Ifyou find that the adjustments are not set to yourpersonal preferences, re-adjust them.

To perform spindle break-in procedure:

1. Rotate variable-speed knob to 50 RPM andhigh/low gearbox knob to low "L".

2. Press ON button.

3. Run spindle for minimum of 10 minutes.

4. Without stopping spindle, use variable-speedknob to run machine at 500 and 1000 RPM

for 10 minutes each.



23/52Model G0758 (Mfd. Since 2/14) -21-

SECTION 4: OPERATIONS

To complete typical operation, operator does

the following:

1. Examines workpiece to make sure it is suit-able for cutting/drilling.

2. Puts on personal protective equipment.

3. Securely clamps workpiece to table.

4. With machine disconnected from power,installs correct tooling.

5. Adjusts headstock height above table.

6. Rotates variable-speed knob to lowest set-ting.

7. Selects correct gear setting on gearbox.

8. Connects machine to power and presses ONbutton and rotates variable-speed knob tocorrect spindle speed.

9. Uses downfeed controls or table controls toperform operation.

10. Presses OFF button and waits for spindle tocompletely stop before removing workpiece,changing tooling, or changing spindle speeds.

Operation Overview

The purpose of this overview is to provide the nov-ice machine operator with a basic understandingof how the machine is used during operation, sothe machine controls/components discussed laterin this manual are easier to understand.

Due to the generic nature of this overview, it isnot intended to be an instructional guide. To learnmore about specific operations, read this entiremanual and seek additional training from expe-rienced machine operators, and do additional

research outside of this manual by reading "how-to" books, trade magazines, or websites.

To reduce your risk ofserious injury, read thisentire manual BEFOREusing machine.

If you are not experienced with this typeof machine, WE STRONGLY RECOMMENDthat you seek additional training outside ofthis manual. Read books/magazines or getformal training before beginning any proj-ects. Regardless of the content in this sec-tion, Grizzly Industrial will not be held liablefor accidents caused by lack of training.

To reduce risk of eye or face injury fromflying chips, always wear approved safetyglasses and face shield when operating thismachine.

To reduce risk of injury from unexpected

startup of spindle at high speeds, alwaysrotate variable-speed dial to the lowest set-ting before starting spindle.


24/52-22- Model G0758 (Mfd. Since 2/14)

Using DRO

Figure 19. Identification of DRO controls.

Figure 18. Identification of downfeed controls.

1. Press Power/ button (see Figure 19). Areading should appear on display.

O

3. Press ZERO to "zero" readout at any time.Current reading will be cleared and scale willreset to 0.00.

To increase or decrease reading, press orbutton. This is useful when calibrating mill/

drill to known dimensions on a workpiece.

4. Press Power/ button when operation is com-plete.

O

Using Coarse Downfeed1. Loosen downfeed selector knob to engage

coarse downfeed handles.

2. Loosen quill lock lever.

3. Turn on spindle DRO and zero it out.

4. Use coarse downfeed handles to raise andlower spindle while referencing spindle DROfor precise movement.

Using Fine Downfeed1. Tighten downfeed selector knob to engage

fine downfeed handwheel.

2. Loosen quill lock lever.

3. Turn on spindle DRO and zero it out.

4. Rotate fine downfeed handwheel to raise andlower spindle while referencing spindle DROfor precise movement.

Downfeed Controls

Identification

A. Quill Lock Lever

B. Spindle Downfeed DRO

C. Fine Downfeed Handwheel

D. Coarse Downfeed Handle

E. Downfeed Selector Knob

B C

D

E

A

2. Press in/mm button to select inches or mil-limeters. Each press of button switchesbetween units.

PowerButton

Zero

in/mm

Button

v Button


25/52Model G0758 (Mfd. Since 2/14) -23-

HeadstockMovement

Raising/Lowering Headstock 1. DISCONNECT MACHINE FROM POWER!

2. Loosen both Z-axis lock levers shown inFigure 20.

Figure 20. Location of Z-axis lock levers.

Z-AxisLock

Levers

3. Use vertical handwheel shown in Figure 21 to adjust headstock height.

4. Retighten lock levers.

Figure 21. Location of Z-axis handwheel.

VerticalHandwheel

The headstock moves in the following ways:

• Travels up and down the column (Z-axis).• Tilts 45° left or right relative to the table.

Tilting Headstock Tools Needed QtyWrench 19mm ................................................... 1Wrench 14mm ................................................... 1

To tilt headstock:

1. DISCONNECT MACHINE FROM POWER!

2. Support headstock with one hand, then loos-en headstock center bolt and angle lock nut(see Figure 22).

3. While watching tilt scale, rotate headstock torequired angle, then retighten center bolt andangle lock nut to secure headstock.

Tilt Scale

Center Bolt

Figure 22. Headstock tilt controls.

AngleLock Nut


26/52-24- Model G0758 (Mfd. Since 2/14)

Table Travel

The table travels in two directions and is con-trolled by handwheels, as illustrated in Figure 23:

• X-axis (longitudinal)

• Y-axis (cross)

X-Axis or Longitudinal Travel(Left & Right)

Y-Axis or

Cross Travel(In & Out)

Figure 23. Possible directions of table travel.

Graduated DialsThe handwheels have graduated dials that areused to determine table movement in 0.002"increments, with one full revolution equalling0.100".

Rotate graduated dial to a relative starting point(see Figure 24).

Figure 24. Graduated dial location.

Graduated Dial

X-Axis HandwheelTool Needed QtyHex Wrench 5mm .............................................. 1

To use X-axis handwheel:

1. Loosen both X-axis table locks shown in

Figure 25.

Note: To readjust positioning of table locks,pull out and rotate.

2. Position table stops along front of table torestrict table travel.

3. Adjust X-axis graduated dial to zero, then usehandwheel to move table.

Y-Axis HandwheelThe saddle does not have limit stops. To movethe table along the Y-axis, loosen the Y-axistable locks shown in Figure 25, then use thehandwheel in front of the table in the same man-ner as the X-axis handwheel.

Figure 25. X- and Y-axis table travel locks.

X-AxisTable Locks

Y-AxisTable Locks

Table Stops


27/52


28/52-26- Model G0758 (Mfd. Since 2/14)

Using the correct spindle speed is important forsafe and satisfactory results, as well as maximiz-ing tool life.

To set the spindle speed for operation, you willneed to: 1) Determine the best spindle speed forthe cutting/drilling task, and 2) adjust the gear boxknob and variable-speed knob to produce deter-mined speed.

Determining Spindle SpeedMany variables affect the optimum spindle speedto use for any given operation, but the two mostimportant are the recommended cutting speedfor the workpiece material and the diameter of

the cutting tool, as noted in the formula shown inFigure 29.

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

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

The books Machinery’s Handbook or MachineShop Practice, and some internet sites, pro-

vide excellent recommendations for which cuttingspeeds to use when calculating the spindle speed.These sources also provide a wealth of additionalinformation about the variables that affect cuttingspeed and they are a good educational resource.

Also, there are a large number of easy-to-usespindle speed calculators that can be found onthe internet. These sources will help you take intoaccount the applicable variables in order to deter-mine the best spindle speed for the operation.

Cutting Speed (FPM) x 12*Recommended

Tool Dia. (in inches) x 3.14=

SpindleSpeed(RPM)

*Double if using carbide cutting tool

Figure 29. Formula for determining best spindlespeed.

Spindle SpeedRemoving ToolingTools Needed QtySpindle Pin ........................................................ 1Wrench 8mm ..................................................... 1Brass Hammer .................................................. 1

To remove tooling:


2. Remove drawbar cap and secure spindlewith spindle pin. Unthread drawbar from tool-ing one full rotation.

Note: Do not fully unthread tooling fromdrawbar or the drawbar and tool threadscould be damaged in the next step.

3. Tap top of drawbar with brass hammer to

unseat taper.

4. Hold onto tooling with one hand and fullyunthread drawbar.


29/52Model G0758 (Mfd. Since 2/14) -27-

SECTION 5: ACCESSORIES

Installing unapproved accessories may

cause machine to malfunction, resulting inserious personal injury or machine damage.To reduce this risk, only install accessoriesrecommended for this machine by Grizzly.

NOTICE Refer to our website or latest catalog foradditional recommended accessories.

order online at www.grizzly.com or call 1-800-523-4777

G7156—4" (35 ⁄ 8") Precision Milling ViseG7154—5" (41 ⁄ 2") Precision Milling ViseG7155—6" (55 ⁄ 8") Precision Milling ViseSwiveling Milling Vises feature perfectly aligned,precision ground jaws, large Acme ® screws andeasy-to-read 0°–360° scales.

Figure 30. G7154 Precision Milling Vise.

Figure 31. T26612 optional stand for ModelG0758.

G5562—SLIPIT ® 1 Qt. GelG5563—SLIPIT ® 12 Oz. SprayG2871—Boeshield ® T-9 12 Oz. Spray

G2870—Boeshield ®

T-9 4 Oz. SprayH3788—G96 ® Gun Treatment 12 Oz. SprayH3789—G96 ® Gun Treatment 4.5 Oz. Spray

Figure 33. Recommended products for machinelubrication.

SB1365—South Bend Way Oil-ISO 68T23964—Moly-D Multi-purpose NLGI#2Grease

T26612—Optional Stand for Model G0758

Figure 32. Recommended products forprotecting cast iron/steel parts on machinery.


30/52-28- Model G0758 (Mfd. Since 2/14)

SECTION 6: MAINTENANCE

Metal chips left on the machine that have beensoaked with water-based coolant will invite oxida-tion and a gummy residue build-up around themoving parts. Use a brush and shop vacuum toremove chips and debris from the working sur-faces of the mill/drill. Never blow off the mill/drillwith compressed air, as this will force metal chipsdeep into the mechanisms and may cause injuryto yourself or bystanders.

Remove any rust build-up from unpainted castiron surfaces of mill/drill and treat with a non-staining lubricant after cleaning.

Protect other unpainted cast iron surfaces withregular applications of products like G96 ® GunTreatment, SLIPIT ® , or Boeshield ® T-9. (SeeAccessories on Page 27 for more details.)

An essential part of lubrication is cleaning thecomponents before lubricating them.

This step is critical because grime and chips buildup on lubricated components over time, whichmakes them hard to move.

Clean all exterior components in this section withmineral spirits, shop rags, and brushes beforelubricating.

DISCONNECT MACHINE FROM POWERBEFORE PERFORMING LUBRICATION!

Lubrication

For optimum performance from the machine, fol-low this maintenance schedule and refer to any

specific instructions given in this section.

Daily Check:• Loose mounting bolts.• Damaged tooling.• Clean debris and built up grime off of machine.• Worn or damaged wires.• Any other unsafe condition.

Every 8 Hours of Operation:• Lubricate table and column ways (Page 29).• Lubricate quill outside surface (Page 31).

Every 40 Hours of Operation:• Lubricate table leadscrews (Page 30).

Every 90 Hours of Operation:• Headstock gears (Page 30).• Lubricate quill rack (Page 31).

Every 120 Hours of Operation:• Lubricate column leadscrew (Page 29).

Schedule

To reduce risk of shock or

accidental startup, alwaysdisconnect machine frompower before adjustments,maintenance, or service.

Cleaning andProtecting

Follow reasonable lubrication practices asoutlined in this manual. Failure to do socould lead to premature failure of machineand will void warranty.


31/52Model G0758 (Mfd. Since 2/14) -29-

Table and Column WaysLube Type .. Model SB1365 or ISO 68 EquivalentLube Amount ........................................Thin CoatLubrication Frequency ...........8 hrs. of Operation

Regular lubrication will ensure mill/drill performsat its highest potential. Regularly wipe table and

column ways with recommended lubrication, thenmove components back and forth several times toensure smooth movements (see Figures 34–36).

Z-Axis LeadscrewsLube Type ..Model T23964 or NLGI#2 EquivalentLube Amount ........................................Thin CoatLubrication Frequency ....... 120 hrs. of Operation

To lubricate Z-axis leadscrew:


2. Lower headstock as far as you can withoutcontacting spindle to table surface.

3. Use mineral spirits and a brush to clean asmuch existing grease and debris off of Z-axisleadscrew shown in Figure 37 as possible.Allow leadscrew to dry.

4. Using a brush, apply NLGI#2 grease toexposed leadscrew threads, then move head-stock through its full range of motion severaltimes to disperse grease along full length ofleadscrew.

Figure 35. Y-axis way lubrication points.

Y-Axis Ways

Figure 36. X-axis lubrication points.

X-Axis Ways

Figure 37. Z-axis leadscrew lubrication point.

Z-AxisLeadscrew

Figure 34. Z-axis way lubrication points.

Z-Axis Ways

(1 of 2)


32/52-30- Model G0758 (Mfd. Since 2/14)

Figure 39. Location of X-axis leadscrew.

Figure 38. Location of Y-axis leadscrew.

X-Axis Leadscrew

Table LeadscrewsLube Type .. Model SB1365 or ISO 68 EquivalentLube Amount ........................................Thin CoatLubrication Frequency .........40 hrs. of Operation

To lubricate table leadscrews:


2. Using Y-axis handwheel, move table as farforward as possible.

3. Use a 4mm hex wrench to remove rubberway cover, then use mineral spirits and abrush to clean existing grease and debrisoff of Y-axis leadscrew shown in Figure 38.Allow leadscrew to dry.

4. Apply thin coat of ISO 68 machine oil toexposed leadscrew threads, then move tablethrough its full range of cross motion sev-eral times to disperse oil along full length ofleadscrew.

5. Using X-axis handwheel, move table as far toone side as possible.

6. From beneath table, use mineral spirits anda brush to clean as much of existing greaseand debris as possible off of X-axis leadscrewshown in Figure 39. Allow leadscrew to dry.

Headstock GearsLube Type ..Model T23964 or NLGI#2 EquivalentLube Amount ........................................Thin CoatLubrication Frequency .........90 hrs. of Operation

To lubricate headstock gears:

1. Remove cap screw and headstock gearaccess cover shown in Figure 40.

Figure 40. Headstock access cover and capscrew location.

2. Using small brush, apply thin coat of greaseto headstock gears.

3. Operate mill/drill in both high and low gearsettings to work grease through gears.

4. Re-install access cover and cap screwremoved in Step 1.

Headstock

Gears

HeadstockGear

AccessCover

Cap Screw

Y-AxisLeadscrew


33/52Model G0758 (Mfd. Since 2/14) -31-

Quill Outside SurfaceLube Type .. Model SB1365 or ISO 68 EquivalentLube Amount ........................................Thin CoatLubrication Frequency ...........8 hrs. of Operation

To lubricate quill:

1. Without disturbing grease on quill rack, cleanoutside smooth surface of quill (see Figure 41)with mineral spirits and shop rags.

Figure 41. Outside surface of quill.

2. When dry, apply thin coat of lubricant tosmooth surface, then move spindle up anddown to evenly distribute oil.

Quill OutsideSurface

2. Clean teeth with mineral spirits, shop rags,and brush.

3. When dry, apply thin coat of grease to teethand raise/lower quill several times to evenlydistribute.

Note: Re-apply oil that may have been

removed during the cleaning process to thequill surface around the rack.

Figure 42. Quill rack location.

Quill RackLube Type ..Model T23964 or NLGI#2 Equivalent

Lube Amount ........................................Thin CoatLubrication Frequency .........90 hrs. of Operation

To lubricate quill rack:

1. Move quill down to gain full access to quillrack (see Figure 42).

Rack

Replacing DROBattery

Figure 43. Battery cover for DRO.

If the DRO stops operating correctly, the 3V lithi-um cell battery must be replaced.

To replace DRO battery:

1. Using a #3 standard screwdriver, removebattery cover (see Figure 43) by rotatingcounterclockwise.

2. Remove old battery, dispose of it accordingto state and federal regulations, then replaceit with a new one.

3. Replace battery cover.

Battery Cover


34/52-32- Model G0758 (Mfd. Since 2/14)

Review the troubleshooting and procedures in this section if a problem develops with your machine. If youneed replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663.Note: Please gather the serial number and manufacture date of your machine before calling.

SECTION 7: SERVICE

Troubleshooting

Symptom Possible Cause Possible Solution

Machine does not

start or a breaker

trips.

1. Blown fuse in machine.

2. Chuck guard open.

3. Incorrect power supply voltage.

4. Plug/receptacle at fault/wired wrong.

5. Power supply circuit breaker tripped or fuseblown.

6. Motor wires connected incorrectly.

7. Wiring is open/has high resistance.

8. Motor brushes at fault.

9. Chuck guard safety switch at fault.

10. Circuit board at fault.

11. Motor at fault.

12. Potentiometer/variable-speed dial at fault.

1. Replace fuse/ ensure there are no shorts.

2. Close guard.

3. Ensure power supply voltage matches circuit

requirements.

4. Test for good contacts; correct wiring.

5. Ensure circuit is sized correctly and free of shorts.Reset circuit breaker or replace fuse.

6. Correct motor wiring connections.

7. Check for broken wires or disconnected/corroded

connections; repair/replace as necessary.

8. Remove/replace brushes.

9. Replace safety switch.

10. Test/replace.

11. Test/repair/replace.

12. Test/replace.

Machine stalls or is

overloaded.

1. Feed rate/cutting speed too fast.

2. Wrong cutter type.

3. Machine is undersized for task or tooling isincorrect for task.

4. Motor wired incorrectly.

5. Motor bearings are at fault.

6. Motor has overheated.

7. Motor is at fault.

1. Decrease feed rate/cutting speed.

2. Use correct cutter for task.

3. Use smaller or sharper tooling; reduce feed rate orspindle speed; use coolant fluid if possible.

4. Ensure motor wiring is correct.

5. Test by rotating shaft; rotational grinding/loose shaft

requires bearing replacement.

6. Clean off motor, let cool, and reduce workload.

7. Test/repair/replace motor.

Machine has

vibration or noisy

operation.

1. Motor or machine component is loose.

2. Machine is incorrectly mounted or sits

unevenly.

3. Motor fan is rubbing on fan cover.

4. Workpiece not secure.

5. Excessive depth of cut.

6. Cutter/tooling is loose.

7. Cutter is dull or at fault.

8. Bit is chattering.

9. Motor bearings are at fault.

1. Inspect/replace stripped or damaged bolts/nuts, and

retighten with thread locking fluid.

2. Tighten/replace mounting bolts in bench; relocate/

shim machine.

3. Replace dented fan cover or damaged fan.

4. Properly clamp workpiece on table or in vise.

5. Decrease depth of cut.

6. Make sure tooling is properly secured.

7. Replace/resharpen cutter.

8. Replace/sharpen bit; index bit to workpiece; use

appropriate feed rate and cutting RPM.

9. Test by rotating shaft; rotational grinding/loose shaft

requires bearing replacement.


35/52Model G0758 (Mfd. Since 2/14) -33-

Symptom Possible Cause Possible Solution

Tool slips in spindle. 1. Tool is not fully drawn up into

spindle taper.

2. Debris on tool or in spindle taper.

3. Taking too big of cut.

1. Tighten drawbar (Do not overtighten).

2. Clean collet and spindle taper.

3. Lessen depth of cut and allow chips to clear.

Breaking tools or cutters. 1. Spindle speed/feed rate is too fast.

2. Cutting tool too small.3. Cutting tool getting too hot.

4. Taking too big of a cut.

5. Spindle extended too far down.

1. Set spindle speed correctly (Page 26) or use slower

feed rate.

2. Use larger cutting tool and slower feed rate.3. Use coolant fluid or oil for appropriate application if

possible.

4. Lessen depth of cut and allow chips to clear.

5. Fully retract spindle and lower headstock. This

increases rigidity.

Workpiece vibrates or

chatters during operation.

1. Table locks not tight.

2. Workpiece not secure.

3. Spindle speed/feed rate is too fast.


1. Tighten down table locks.

2. Properly clamp workpiece on table or in vise.

3. Set spindle speed correctly (Page 26) or use slower

feed rate.


increases rigidity.

Table is hard to move. 1. Table locks are tightened down.

2. Chips have loaded up on ways.

3. Ways are dry and need lubrication.

4. Table limit stops are interfering.

5. Gibs are too tight.

1. Make sure table locks are fully released.

2. Frequently clean away chips that load up during

milling operations.

3. Lubricate ways (Page 29).

4. Check to make sure that all table limit stops are not

in the way.

5. Adjust gibs (see Page 34).

Bad surface finish. 1. Spindle speed/feed rate is too fast.

2. Using dull or incorrect cutting tool.

3. Wrong rotation of cutting tool.4. Workpiece not secure.


1. Set spindle speed correctly (Page 26) or use a

slower feed rate.

2. Sharpen cutting tool or select one that better suits

operation.

3. Check for proper cutting rotation for cutting tool.4. Properly clamp workpiece on table or in vise.


increases rigidity.


36/52-34- Model G0758 (Mfd. Since 2/14)

Adjusting Gibs

Gibs are tapered lengths of metal sandwichedbetween two moving surfaces to control howmuch friction they have when they slide past oneanother. Correctly adjusting the gibs is critical to

producing accurate milling results.

Tight gibs make table movement more accuratebut stiff. Loose gibs make table movement sloppybut easy. The goal of gib adjustment is to removeunnecessary sloppiness without causing the waysto bind.

Tip: Many experienced machinists adjust the gibsuntil there is just a slight drag in table movement.

Screws on each end allow gib adjustment to

increase or decrease the friction between the slid-ing surfaces of the ways.

DISCONNECT MACHINE FROM POWERBEFORE ADJUSTING THE GIBS!

Make sure all table locks are loose. Then, loosenone gib adjustment screw (see Figure 44) andtighten the opposing screw the same amount tomove the gib, while at the same time using thehandwheels to move the table until you feel aslight drag in that path of movement.

Figure 44. Location of gib screws.

Adjusting LeadscrewBacklash

Leadscrew backlash is the amount of free-playmovement in the leadscrew (when changing the

direction of rotation) before the attached devicebegins to move.

Leadscrews must have a certain amount of back-lash, but over time, this will increase with normalwear. Generally, 0.003"–0.006" leadscrew back-lash is acceptable to ensure smooth movementand reduce the risk of premature thread wear.

The X- and Y-axis leadscrew backlash is adjustedby using a long 5mm hex wrench to tighten/loosenthe cap screw on the leadscrew nut. This adjusts

the force the split leadscrew nut exerts on theleadscrew threads.

The X-axis leadscrew nut shown in Figure 45is accessed from underneath the left side of thetable.

Figure 45. Example of X-axis leadscrew nut capscrew for adjusting backlash.

X-Axis Leadscrew NutCap Screw

Y-Axis Gib Screw(1 of 2)

X-Axis Gib Screw(1 of 2)

The Y-axis leadscrew nut is similar and is accessedfrom underneath the machine base.


37/52


38/52-36- Model G0758 (Mfd. Since 2/14)READ ELECTRICAL SAFETY

ON PAGE 36!

SHOCK HAZARD.Working on wiring that is con-nected to a power source is extremely dangerous.

Touching electrified parts will result in personalinjury including but not limited to severe burns,electrocution, or death. Disconnect the powerfrom the machine before servicing electrical com-ponents!

MODIFICATIONS. Modifying the wiring beyondwhat is shown in the diagram may lead to unpre-dictable results, including serious injury or fire.This includes the installation of unapproved after-

market parts.

WIRE CONNECTIONS. All connections mustbe tight to prevent wires from loosening duringmachine operation. Double-check all wires dis-connected or connected during any wiring task toensure tight connections.

CIRCUIT REQUIREMENTS. You MUST followthe requirements at the beginning of this man-ual when connecting your machine to a powersource.

WIRE/COMPONENT DAMAGE. Damaged wiresor components increase the risk of serious per-

sonal injury, fire, or machine damage. If you noticethat any wires or components are damaged whileperforming a wiring task, replace those wires orcomponents.

MOTOR WIRING. The motor wiring shown inthese diagrams is current at the time of printingbut may not match your machine. If you find thisto be the case, use the wiring diagram inside themotor junction box.

CAPACITORS/INVERTERS. Some capacitorsand power inverters store an electrical charge forup to 10 minutes after being disconnected fromthe power source. To reduce the risk of beingshocked, wait at least this long before working oncapacitors.

EXPERIENCING DIFFICULTIES. If you are expe-riencing difficulties understanding the informationincluded in this section, contact our TechnicalSupport at (570) 546-9663.

Wiring Safety Instructions

The photos and diagrams

included in this section are

best viewed in color. You

can view these pages in

color at www.grizzly.com.

These pages are current at the time of printing. However, in the spirit of improvement, we may make chang-es to the electrical systems of future machines. Compare the manufacture date of your machine to the onestated in this manual, and study this section carefully.

If there are differences between your machine and what is shown in this section, call Technical Support at(570) 546-9663 for assistance BEFORE making any changes to the wiring on your machine. An updatedwiring diagram may be available. Note: Please gather the serial number and manufacture date of yourmachine before calling. This information can be found on the main machine label.

SECTION 8: WIRINGmachine


39/52Model G0758 (Mfd. Since 2/14) -37-READ ELECTRICAL SAFETY

ON PAGE 36!

G0758 Wiring Overview

Figure 49. Wiring overview.

Front Panel

Motor

SpindleRPM

Sensor

Figure 50. Wiring overview.

Side PanelFront Panel

InsideBottomPanel

Limit Switch

Rear Panel


40/52-38- Model G0758 (Mfd. Since 2/14)READ ELECTRICAL SAFETY

ON PAGE 36!

2 3

2 4

1 3

1 4

W X 1 4 - 1 2

4 K 7 ± 5

Z D - S K - T H L

L 2

L 1

A +

A

P 3

P 1

R 3 1

5 W R 0 2 J

B

A

J 2

J 1

I N I N N

N 1

L 1

G

L

C E S X 1 1 0 1 - 2 8

J D - 0 1 4

R E V A 0 9 1 1 1 1

N e u t r a l

H o t

G r o u n d

1 1 0 V A C

5 - 1 5 P l u g

( A s R e c o m m e n d e d )

T o P l u g

F u s e - F 1 0 A L 2 5 0 V

F u s e H o l d e r - M F 5 2 8 1 0 A

2 5 0 V

F u s e - F 1 0 A L 2 5 0 V

F u s e H o l d e r - M F 5 2 8 1 0 A

2 5 0 V

V a r i a b l e

S p e e d D i a l

G N D

K E D U

K J D 1 7 B

1 2 0 V

F r o n t P a n e l ( V i e w

e d F r o m B e h i n d )

S i d e P a n e l

R e a r

P a n e l

I n s i d e B o t t o m P a n e l

1 1 0 V M o t o r

S p i n d l e

R P M

S e n s o r

O n / O f f S w i t c h

S p i n d l e S p e e d D R O

C i r c u i t B o a r d

C i r c u i t B o a r d

L i m

i t S w i t c h

K W

1 - 1 0 3

1 5 A 1 2 5 V A C

1 6 ( 4 ) A

2 5 0 V A C

JYMC- 22UB-II DC Moto

Documents

Grizzly G0758 Mill-Drill Manual