Grizzly G8689Z User guide

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MODEL G8689Z

4" X 16" MINI MILLING

MACHINE

OWNER'S MANUAL

(For models manufactured since 07/23)

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

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

#CS22812 PRINTED IN CHINA

***Keep for Future Reference***

V1.0 8.23

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

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

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

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

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

• Lead from lead-based paints.

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

• Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: Work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

Table of Contents

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

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

Manual Accuracy Identification Controls & Components Machine Data Sheet

SECTION 1: SAFETY

Safety Instructions for Machinery Additional Safety for Mill/Drills

SECTION 2: POWER SUPPLY

SECTION 3: SETUP

Needed for Setup Unpacking Inventory Cleanup Site Considerations Lifting & Placing Leveling Bench Mounting Test Run Spindle Break-In

SECTION 4: OPERATIONS

Operation Overview Positioning Table Joining Drill Chuck & Arbor Removing/Installing Tooling Tilting Column Using Spindle Downfeed Adjusting Depth Stop Setting Spindle Speed

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SECTION 5: ACCESSORIES

SECTION 6: MAINTENANCE

Schedule Cleaning & Protecting Lubrication

SECTION 7: SERVICE

Troubleshooting Adjusting Gibs

Adjusting X-Axis Leadscrew Backlash......... 36

Replacing Fuse Replacing Motor Brushes Tramming Spindle

SECTION 8: WIRING

Wiring Safety Instructions Wiring Diagram Electrical Component Photos

SECTION 9: PARTS

Table Headstock Column Labels & Cosmetics

WARRANTY & RETURNS

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

serial number

from the

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

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

Email: manuals@grizzly.com

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

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

you receive is

slightly different than shown in the manual

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

check our

website for an updated version. W

current

manuals and

on our web-

site at

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

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

INTRODUCTION

Contact Info

and manufacture date

Grizzly Technical Support

1815 W. Battlefield Springfield, MO 65807 Phone: (570) 546-9663

Email: techsupport@grizzly.com

Grizzly Documentation Manager

P.O. Box 2069

Bellingham, WA 98227-2069

Manual Accuracy

made every effort to be exact with the

sometimes the machine

e post

manual updates for free

www.grizzly.com.

manufacture date and

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.

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.

Manufacture Date

Serial Number

-2-

Model G8689Z (Mfd. Since 07/23)

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

Identification

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

Electrical Box

Motor

Rapid Downfeed

Lever

Control

Panel

Z-Axis

Lock Handle

Chip Guard

(1 of 3)

Chuck

Way Cover

(1 of 2)

Handwheel

Y-Axis

Lock Handle

Depth

Stop

Spindle Power

Reset Indicator

Speed Range

Lever

Emergency

Stop

Button

Column

Power Indicator

Drawbar

Cover

Micro Downfeed

Knob

Headstock

X-Axis

Handwheel

X-Axis

Lock Handle

Model G8689Z (Mfd. Since 07/23)

Table

using machine.

-3-

Controls &

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

Components

Note: Spindle speed dial must be rotated all

the way counterclockwise to reset spindle power after Emergency Stop button has been used or ON/OFF toggle switch has been moved to OFF position.

D. ON/OFF Toggle Switch: Turns machine

power ON and OFF.

E. Fuse Socket: Houses 5A fuse.

using machine.

Refer to the following figures and descriptions to become familiar with the basic controls and components of this machine. Understanding these items and how they work will help you understand the rest of the manual and minimize your risk of injury when operating this machine.

Power

F. Emergency Stop Button w/Cover: Turns

incoming power OFF and cover clicks into place to prevent accidental startup.

Spindle

Figure 1. Power controls and components.

A. Spindle Power Reset Indicator: Illuminates

when power is ON but spindle speed dial needs to be reset in order to start spindle rotation. To reset spindle power, rotate spindle speed dial all the way counterclockwise.

B. Power Indicator: Illuminates when power is

connected to machine and Emergency Stop button cover is open.

C. Spindle Speed Dial: Rotates clockwise to

increase spindle RPM; rotates counterclockwise to decrease spindle RPM. Spindle speed ranges from 0–1100 RPM in low speed mode and 0–2500 RPM in high speed mode.

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Figure 2. Right spindle components.

G. Micro Downfeed Knob: Moves headstock

up and down for precise Z-axis control when milling.

H. Rapid Downfeed Lever (1 of 3): Quickly

moves headstock up and down for drilling operations.

I. Z-Axis Lock Handle: Secures headstock

position on column.

J. Depth Stop Lock Handle: Secures depth

stop position on column.

K. Depth Stop: Limits depth of headstock and

spindle travel for repeated operations.

Model G8689Z (Mfd. Since 07/23)

Table

Figure 3. Left spindle components.

L. Speed Range Lever: Selects low or high

spindle speed range.

M. Downfeed Graduated Collar: Displays spin-

dle movement in 0.001" increments. One full revolution of micro downfeed knob represents 0.060" of spindle travel.

N. Spindle: Accepts collets, arbors, and other

tool holders with an R8 taper.

O. Column Tilt Scale: Indicates column tilt in

relation to table.

P. Z-Axis Scale: Indicates spindle and head-

stock depth.

Figure 4. Table components.

Q. X-Axis Scale: Indicates longitudinal table

travel.

R. Table Graduated Collar (1 of 2): Displays

table movement in 0.001" increments. One full revolution of either table handwheel represents 0.0625" of table travel.

S. X-Axis Handwheel: Moves table along

X-axis (left and right).

T. Y-Axis Lock Handle: Tightens to prevent

Y-axis table movement for increased rigidity during operations when Y-axis should not move.

U. Y-Axis Handwheel: Moves table along

Y-axis (front and back).

V. X-Axis Lock Handle: Tightens to prevent

X-axis table movement for increased rigidity during operations when X-axis should not move.

Model G8689Z (Mfd. Since 07/23)

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Machine Data Sheet

MACHINE DATA

SHEET

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

MODEL G8689Z 4" X 16" MINI MILLING MACHINE

Product Dimensions:

Weight.............................................................................................................................................................. 101 lbs.

Width (side-to-side) x Depth (front-to-back) x Height........................................................................... 20 x 20 x 30 in.

Footprint (Length x Width)................................................................................................................. 12-1/2 x 8-1/2 in.

Space Required for Full Range of Movement (Width x Depth).............................................................. 29-1/2 x 20 in.

Shipping Dimensions:

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

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

Weight.............................................................................................................................................................. 135 lbs.

Length x Width x Height....................................................................................................................... 20 x 21 x 28 in.

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

Electrical:

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

Full-Load Current Rating....................................................................................................................................... 4.5A

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

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

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

Power Cord Length.............................................................................................................................................. 90 in.

Power Cord Gauge......................................................................................................................................... 18 AWG

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

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

Switch Type.................................................................................. ON/OFF Toggle Switch w/Emergency Stop Button

Motors:

Main

Horsepower............................................................................................................................................. 1/2 HP

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

Amps........................................................................................................................................................... 4.5A

Speed................................................................................................................................................ 6000 RPM

Type.................................................................................................................................................... DC Brush

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

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

Main Specifications:

Operation Info

Max Distance Spindle to Column.......................................................................................................... 6-3/8 in.

Max Distance Spindle to Table............................................................................................................ 10-1/2 in.

Longitudinal Table Travel (X-Axis)........................................................................................................ 9-1/8 in.

Cross Table Travel (Y-Axis)......................................................................................................................... 4 in.

Vertical Head Travel (Z-Axis)................................................................................................................ 9-1/2 in.

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

Drilling Capacity for Cast Iron................................................................................................................... 1/2 in.

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

End Milling Capacity................................................................................................................................. 1/2 in.

Face Milling Capacity................................................................................................................................... 1 in.

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Model G8689Z (Mfd. Since 07/23)

Table Info

Table Length........................................................................................................................................ 15-3/4 in.

Table Width........................................................................................................................................... 3-5/8 in.

Table Thickness.................................................................................................................................... 1-1/4 in.

Table Height (from Floor/Base)............................................................................................................. 5-1/4 in.

Table Weight Capacity............................................................................................................................. 46 lbs.

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

T-Slot Size................................................................................................................................................ 1/2 in.

T-Slots Centers...................................................................................................................................... 1-1/8 in.

X/Y-Axis Travel per Handwheel Revolution........................................................................................ 0.0625 in.

Spindle Info

Spindle Taper................................................................................................................................................. R8

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

Range of Vertical Spindle Speeds................................................................................ 0 - 1100, 0 - 2500 RPM

Quill Diameter....................................................................................................................................... 1.580 in.

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

Drawbar Length................................................................................................................................... 4-5/16 in.

Spindle Bearings........................................................................................................................... Ball Bearings

Construction

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

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

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

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

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

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

Other Specifications:

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

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

Approximate Assembly & Setup Time ........................................................................................................ 30 Minutes

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

Sound Rating ..................................................................................................................................................... 85 dB

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

Features:

Two Variable-Speed Spindle Ranges: 0 - 1100 and 0 - 2500 RPM Adjustable Depth Stop Clear Chip Guard on Spindle Rubber Chip Guards on Ways 12-1/2" Swing R8 Spindle Three 1/2" T-Slots 9-1/2" Vertical Head Travel w/Rapid and Micro Downfeed 1/2" Drilling Capacity in Steel and Cast Iron Zero-Setting Dials on Handwheels w/0.001" Graduations Dovetail Headstock Column and Table Ways

Accessories Included:

Drill Chuck 1/32" - 1/2" JT33 Arbor R8 x JT33 Two T-Slot Nuts 3/8"-16 Hex Wrenches 3, 4, 5, 6mm Open-End Wrenches 8 x 10, 14 x 17, 17 x 19, 36mm Spanner Wrench 45 - 52mm Oil Bottle

Model G8689Z (Mfd. Since 07/23)

-7-

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.

Alerts the user to useful information about proper operation of the

NOTICE

machine to avoid machine damage.

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 your 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-

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Model G8689Z (Mfd. Since 07/23)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

EXPERIENCING DIFFICULTIES. If at any time you experience difficulties performing the intended operation, stop using the machine! Contact our Technical Support at (570) 546-9663.

Model G8689Z (Mfd. Since 07/23)

-9-

Additional Safety for Mill/Drills

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

UNDERSTAND ALL CONTROLS. Make sure

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

AVOIDING ENTANGLEMENT. DO NOT wear loose clothing, gloves, or jewelry, and tie back long hair. Keep all guards in place and secure. Always allow spindle to stop on its own. DO NOT stop spindle using your hand or any other object.

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

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

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

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

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

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

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

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

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

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

-10 -

Model G8689Z (Mfd. Since 07/23)

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

or equipment damage may occur if machine is not properly grounded and connected to 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 specified circuit requirements.

For your own safety and protection of

Note: Circuit requirements in this manual apply to

a dedicated circuit—where only one machine will be running on the circuit at a time. If machine will be connected to a shared circuit where multiple machines may be running at the same time, consult an electrician or qualified service personnel to ensure 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.)

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

process. DO NOT connect to power until

Availability

Electrocution, fire, shock,

Serious injury could occur if you connect machine to power before completing setup

instructed later in this manual.

110V Circuit Requirements

Nominal Voltage .................... 110V, 115V, 120V

..........................................................60 Hz

Cycle Phase Power Supply Circuit Plug/Receptacle

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

......................... 15 Amps

............................. NEMA 5-15

supply.

Full-Load Current Rating

Full-Load Current Rating at 110V .....4.5 Amps

Model G8689Z (Mfd. Since 07/23)

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

-11-

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.

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 can 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 be in good condition and contain a ground wire and matching plug/receptacle. Additionally, it must meet the following size requirements:

Grounding & Plug Requirements

it will not fit the outlet, have a qualified electrician install the proper outlet with a

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.

This machine is equipped with a power cord that has an equipment-grounding wire and a grounding plug. Only insert plug into a matching receptacle (outlet) that is properly installed and grounded in accordance with all local codes and ordinances. DO NOT modify the provided plug!

GROUNDED

5-15 RECEPTACLE

Grounding Pin

5-15 PLUG

Extension Cords

If you must use an extension

Neutral Hot

Figure 5. Typical 5-15 plug and receptacle.

SHOCK HAZARD! Two-prong outlets do not meet the grounding requirements for this machine. Do not modify or use an adapter on the plug provided—if

verified ground.

-12-

Minimum Gauge Size ...........................16 AWG

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

Model G8689Z (Mfd. Since 07/23)

SECTION 3: SETUP

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

This machine was carefully packaged for safe transport. When unpacking, separate all enclosed items from packaging materials and inspect them for shipping damage.

please

IMPORTANT:

you are completely satisfied with the machine and have resolved any issues between Grizzly or the shipping agent. You MUST have the original pack-

aging to file a freight claim. It is also extremely helpful if you need to return your machine later.

Needed for Setup

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

Wear safety glasses during the entire setup process!

Description Qty

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

• Cleaner/Degreaser ..................... As Needed

• Disposable Rags ........................ As Needed

• Disposable Gloves ..................... As Needed

• Lifting Sling (Rated for at least 175 lbs.) ..... 1

• Lifting Equipment

(Rated for at least 175 lbs.) ........................ 1

• Another Person .......................................... 1

• Flat Head Screwdriver 1⁄4" ........................... 1

• Mounting Hardware .................... As Needed

HEAVY LIF T! Straining or crushing injury may occur from improperly lifting machine or some of its parts. To reduce this risk, get help from other people and use a forklift (or other lifting equipment) rated for weight of this machine.

Unpacking

If items are damaged

call us immediately at (570) 546-9663.

Save all packaging materials until

Model G8689Z (Mfd. Since 07/23)

-13-

Inventory

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

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

NOTICE

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

Loose Inventory (Figure 6) Qty

A. Handwheel Handles ................................... 2

B. Spindle Locking Pin .................................... 1

C. Drill Chuck Key ........................................... 1

D. Spanner Wrench 45–52mm ....................... 1

E. Open-End Wrenches 8 x 10, 14 x 17,

17 x 19mm ............................................1 Ea.

F. Open-End Wrench 36mm .......................... 1

G. T-Slot Nuts 3⁄8"-16 ....................................... 2

H. Oil Bottle ..................................................... 1

I. Spare Fuse 5A ........................................... 1

J. Hex Wrenches 3, 4, 5, 6mm .................1 Ea.

Figure 6. Loose inventory.

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Model G8689Z (Mfd. Since 07/23)

Cleanup

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

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

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

Before cleaning, gather the following:

• Disposable rags

• Cleaner/degreaser (WD•40 works well)

• Safety glasses & disposable gloves

• Plastic paint scraper (optional)

Basic steps for removing rust preventative:

2. Coat the rust preventative with a liberal

amount of cleaner/degreaser, then let it soak

scrape off as much as you can first, then wipe

then coat all unpainted surfaces with a quality

or disable start switch or

Refer to the Machine Data Sheet for the weight and footprint specifications of your machine. Some workbenches may require additional reinforcement to support the weight of the machine and workpiece materials.

Consider anticipated workpiece sizes and additional space needed for auxiliary stands, work tables, or other machinery when establishing a location for this machine in the shop. Below is the minimum amount of space needed for the

Put on safety glasses.

Site Considerations

Workbench Load

Placement Location

20"

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,

off the rest with the rag.

Repeat Steps 2–3 as necessary until clean,

metal protectant to prevent rust.

NOTICE

Avoid harsh solvents like acetone or brake parts cleaner that may damage painted surfaces. Always test on a small, inconspicuous location first.

Model G8689Z (Mfd. Since 07/23)

20"

29½"

Figure 7. Minimum working clearances.

Children and visitors may be seriously injured if unsupervised around this machine. Lock entrances to the shop

power connection to prevent unsupervised use.

-15-

Lifting & Placing

Use lifting equipment rated for at least 175 lbs., or have an additional person help you lift the machine off of the pallet and onto a workbench or stand, then secure the machine in place.

To lift and place machine:

Move shipping crate next to workbench or

stand, then unbolt machine from pallet.

Thread (2) handwheel handles into X-axis

2. and Y-axis handwheels (see Figure 8).

4. Loosen Z-axis lock handle, use rapid

downfeed levers to move headstock to its highest position, then tighten Z-axis lock handle to secure (see Figure 10).

Rapid

Downfeed

Lever

(1 of 3)

Z-Axis

Lock Handle

Headstock

Figure 10. Headstock adjustment components.

Handwheel

Handle

(1 of 2)

Y-Axis

X-Axis

Handwheel

Figure 8. Handwheel handles installed.

3. Loosen Y-axis lock handle, use Y-axis

handwheel to move work table as close to column as possible, then tighten Y-axis lock handle to secure (see Figure 9).

Column

Handwheel

5. Lift and place machine in desired location.

Note: For lifting equipment, route lifting sling

under headstock, being careful not to put pressure on controls, as shown in Figure 11, then connect sling ends to equipment.

Lifting

Sling

Table

Y-Axis

Lock Handle

Figure 9. Components for preparing table for

lifting.

-16 -

Headstock

Controls

Figure 11. Example of lifting sling position.

Model G8689Z (Mfd. Since 07/23)

Another option is a "direct mount" (see example below) where the machine is secured directly to the workbench with lag screws and washers.

The base of this machine has mounting holes that allow it to be fastened to a workbench or other mounting surface to prevent it from moving during operation and causing accidental injury or damage.

The strongest mounting option is a "Through Mount" (see example below) where holes are drilled all the way through the workbench—and hex bolts, washers, and hex nuts are used to secure the machine in place.

Leveling

Bench Mounting

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

IMPORTANT: Use only hand tools to secure machine to bench. Do not tighten with impact tools, which can permanently twist and bend components and pull a level machine out of alignment.

If needed, use metal shims between the machine base and workbench when leveling the machine.

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 the ﬁgure below for an example of a high precision level offered by Grizzly.

Number of Mounting Holes Diameter of Mounting Hardware Needed

Machine Base

............................ 4

Hex Bolt

Flat Washer

.5⁄16"

Figure 12. H2683 Master Machinist's Level.

Workbench

Flat Washer

Lock Washer

Hex Nut

Figure 13. "Through Mount" setup.

Lag Screw

Flat Washer

Machine Base

Model G8689Z (Mfd. Since 07/23)

Workbench

Figure 14. "Direct Mount" setup.

-17-

Test Run

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

If you find an unusual problem during the test run, immediately stop the machine, disconnect it from power, and fix the problem BEFORE operating the machine again. The

table in the

SERVICE section of this manual can help.

setup instructions have been performed. Operating an improperly set up machine

Serious injury or death can result from

5. Connect machine to power by inserting power

cord plug into matching receptacle. Power indicator will illuminate (see Figure 15).

Power Indicator

Spindle

Speed Dial

Troubleshooting

The test run consists of verifying the following: 1) The motor powers up and runs correctly, and 2) Emergency Stop button works correctly.

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

DO NOT start machine until all preceding

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

Toggle

ON/OFF

Switch

Emergency Stop

Button Cover

Figure 15. Location of power controls, and

Emergency Stop button cover open.

6. Move ON/OFF toggle switch to ON position.

7. Rotate spindle speed dial clockwise just

enough to start spindle rotation. Verify motor starts up and runs smoothly without any unusual problems or noises.

Press Emergency Stop button cover closed

8. to turn machine OFF (see Figure 16).

To test run machine:

Clear all setup tools away from machine.

2. If cover on Emergency Stop button is closed,

move red button on Emergency Stop button cover up until cover springs open (see Figure 15).

Move ON/OFF toggle switch to OFF position

(see Figure 15).

Rotate spindle speed dial all the way counter-

clockwise (see Figure 15). This resets power so machine can start.

-18-

Figure 16. Pressing Emergency Stop button

cover closed.

Rotate spindle speed dial all the way counter-

clockwise. Without opening Emergency Stop button, try to start spindle rotation by rotating spindle speed dial clockwise. Spindle should not rotate.

Model G8689Z (Mfd. Since 07/23)

— If spindle does not rotate, safety feature

You must complete this procedure to maintain the warranty. Failure to do this could cause rapid wear-and-tear of spindle bearings once they are placed under load.

The spindle break-in procedure distributes lubrication

reduce the risk

of early

if there are any "dry" spots or areas where lubrication has settled in the bearings. You

efore

placing

for the first time when the machine is new or if it has been sitting idle for longer than 6 months.

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

of Emergency Stop button cover is working correctly. Congratulations! Test Run is complete.

— If spindle does rotate, immediately turn

machine OFF and disconnect power. Safety feature of Emergency Stop button cover is NOT working properly and must be replaced before further using machine.

Spindle Break-In

2. With Emergency Stop button closed and

machine OFF, move speed range lever to low speed range (see Figure 17).

Note: If speed range lever will not move fully

forward, rotate spindle by hand while holding light pressure on lever. When gears engage, lever will fall into place.

Speed Range

Lever

throughout the bearings to

bearing failure

must complete this procedure b

operational loads on the spindle

are dry spots.

To perform spindle break-in procedure:

1. Successfully perform all steps in Test Run section beginning on Page 18.

DO NOT attempt to change speed range until spindle has come to complete stop, or spindle gearing will be damaged.

Model G8689Z (Mfd. Since 07/23)

Figure 17. Location of speed range lever.

Open Emergency Stop button cover and

move ON/OFF toggle switch to ON position so machine can start.

Rotate spindle speed dial clockwise just

enough to start spindle at low speed. Let machine run for 5 minutes.

Slowly increase spindle RPM to medium

speed and allow machine to run for another 5 minutes.

Slowly increase spindle RPM until speed dial

is all the way clockwise, then allow machine to run at highest speed for another 5 minutes.

Rotate spindle speed dial all the way coun-

terclockwise and wait for spindle to stop, then move speed range lever to high speed range.

Repeat Steps 4–6 with spindle in high speed

range.

Rotate spindle speed dial all the way coun-

terclockwise and move ON/OFF toggle switch to OFF position to turn machine OFF. Congratulations! Spindle break-in is complete!

-19 -

SECTION 4: OPERATIONS

The purpose of this overview is to provide the novice machine operator with a basic understanding of how the machine is used during operation, so the

discussed later

in this manual

Due to the generic nature of this overview, it is not intended to be an instructional guide. To learn more about specific operations, read this entire manual,

training from experienced machine operators outside of this manual by reading "how-to" books, trade magazines, or websites.

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

Keep hair, clothing, and

ing parts at all times. Entanglement can result in death, amputation, or

Operation Overview

machine controls/components

are easier to understand.

seek additional

, and do additional research

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

Examines workpiece to make sure it is suit-

able for milling/drilling.

Securely clamps workpiece to table.

3. With machine disconnected from power,

installs correct tooling.

Adjusts spindle height and tilt, and moves

speed range lever to correct spindle speed range for operation.

Rotates spindle speed dial to 0 RPM.

Puts on personal protective equipment.

using machine.

To reduce risk of eye or face injury from flying chips, always wear approved safety glasses and a face shield when operating this machine.

-20-

jewelry away from mov-

severe crushing injuries!

. Connects machine to power.

. Opens Emergency Stop button cover and

moves ON/OFF toggle switch to ON position.

. Rotates spindle speed dial clockwise to start

spindle rotation, and sets correct spindle speed for operation.

Uses downfeed/table controls to perform

10.

operation.

Rotates spindle speed dial completely coun-

11.

terclockwise and waits for spindle to completely stop before removing workpiece.

Disconnects machine from power before

12.

changing/removing tooling.

If you are not experienced with this type of machine, WE STRONGLY RECOMMEND that you seek additional training outside of this manual. Read books/magazines or get formal training before beginning any projects. Regardless of the content in this section, Grizzly Industrial will not be held liable for accidents caused by lack of training.

Model G8689Z (Mfd. Since 07/23)

Positioning Table

The table travels in two directions and is controlled by handwheels, as illustrated in Figure 18:

• X-axis (longitudinal)

• Y-axis (cross)

Logitudinal (X-Axis)

or Left & Right

The table handwheels have graduated dials in

0.001" increments, with one full revolution equalling 0.0625" (see Figure 20). These dials provide an easy way to gauge precise table movements while milling.

Graduated Dial

Cross Feed (Y-Axis) or In & Out

Figure 18. Directions of table movement.

There is a table lock handle for both the X- and Y-axis (see Figure 19). To ensure the table does not unexpectedly move during precision operations, use these locks to secure the table along an axis that should not move during that operation.

X-Axis

Lock Handle

X-Axis

Handwheel

X-Axis

Handwheel

Figure 20. X-axis handwheel graduated dial.

When you use the handwheels to change the direction of table travel on either axis, backlash will affect the accuracy of the graduated dial. To account for this, move the table in the opposite direction of your next operation, then turn the handwheel to move the table in the intended direction. The exact moment the leadscrew catches and the table begins to move, the backlash has been eliminated and the graduated dial can be "zeroed."

The front of the table also has a scale indicating X-axis travel for when a tight tolerance is not required (see Figure 21).

Y-Axis

Lock Handle

Y-Axis

Handwheel

Figure 19. Table adjustment components.

Model G8689Z (Mfd. Since 07/23)

X-Axis Scale

Indicator

Figure 21. Location of X-axis scale and

indicator.

-21-

Joining Drill Chuck

5. Attempt to separate drill chuck and arbor by

hand —if they separate, repeat Steps 3–4.

Removing/Installing

& Arbor

An arbor and drill chuck come pre-installed on this machine. The following procedure describes how to install a new chuck in the case that you want a different chuck in the future. As it is very difficult to separate an existing chuck and arbor assembly, we recommend obtaining a new arbor and joining the two together.

Items Needed Qty

Acetone or Lacquer Thinner .............. As Needed

New Chuck New Arbor Block of Wood

To join drill chuck and arbor:

1. Use acetone or lacquer thinner to clean drill

chuck and arbor mating surfaces, especially the bore.

........................................................ 1

......................................................... 1

................................................... 1

Tooling

This machine features an R8 spindle taper and

⁄16"-20 spindle drawbar. R8 tool holders are

a secured in position from the top end by the drawbar and feature a keyway for easy alignment (see Figure 23).

Keyways

2. Retract chuck jaws completely into chuck.

3. Insert small end of arbor into chuck.

4. Hold assembly by arbor and tap chuck onto

a block of wood with medium force, as illustrated below.

Figure 22. Tapping drill chuck/arbor on block of

wood.

Figure 23. R8 tool holder keyways.

Before installation, always ensure the tapered surfaces of the tool holder and spindle are completely clean and free of any dust, debris, or lint. This will help ensure proper fit and accurate cutting results.

The R8 tool holder supports a wide range of tools, such as machining arbors, end-mill holders, and fly cutters for cutting operations.

Cutting tools are sharp and can easily cause laceration injuries. Always protect your hands with leather gloves or shop rags when handling cutting tools.

-22-

Model G8689Z (Mfd. Since 07/23)

Removing Tooling

Items Needed Qty

Wrench or Socket 17mm ................................... 1

Brass-Head or Dead-Blow Hammer Shop Rags or Cardboard

To remove tooling:

DISCONNECT MACHINE FROM POWER!

Tighten Z-axis lock handle to keep head-

stock from moving in following steps (see Figure 24).

Remove drawbar cover (see Figure 24).

Drawbar Cover

.................. As Needed

.................. 1

Protect table with cardboard or hold tooling

with rag to prevent it from falling out of headstock and damaging table in following steps.

Loosen drawbar but do not remove it (see

6. Figure 26).

Drawbar

Figure 26. Loosening drawbar.

Z-Axis

Lock

Handle

Figure 24. Location of Z-axis lock handle and

drawbar cover.

4. Insert spindle locking pin into hole on side of headstock (see Figure 25). Turn spindle by hand until locking pin fully seats in spindle so spindle will not rotate.

Spindle

Locking Pin

DO NOT completely unscrew drawbar before striking it with hammer in following step. You will damage threads on drawbar and tool holder.

7. Tap top of drawbar with hammer to unseat taper, as shown in Figure 27.

Figure 25. Spindle locking pin inserted.

Model G8689Z (Mfd. Since 07/23)

Figure 27. Example of using hammer to unseat

taper.

8. Support tool with one hand and fully unthread drawbar with other hand.

-23-

Installing Tooling

Items Needed Qty

Cleaner/Degreaser ............................ As Needed

Shop Rags Wrench or Socket 17mm

To install tooling:

DISCONNECT MACHINE FROM POWER!

Clean debris or oily substances from inside

spindle taper and tooling mating surface.

Insert tooling up into spindle taper. Rotate

tooling until you feel tooling keyway align with protruding pin inside spindle taper so you can fully seat it.

With one hand holding tooling in place,

thread drawbar into tooling until tooling draws up into spindle taper (see Figure 28). Tighten drawbar until snug.

......................................... As Needed

................................... 1

Tilting Column

For machining operations requiring an angle, the column of the Model G8689Z can be adjusted up to 45° in either direction of the vertical axis (Z-ax is).

Column is heavy. Machine must be securely fastened to workbench or table before tilting column to prevent injury. Refer to Page 17 for more Bench Mounting instructions.

Tools Needed Qty

Wrench or Socket 36mm ................................... 1

To tilt column:

DISCONNECT MACHINE FROM POWER!

Figure 28. Example of tightening drawbar.

DO NOT overtighten drawbar. Overtightening makes tool removal difficult and may damage tooling and threads.

5. Check seat by gently pulling down on tooling.

— If tooling comes loose, repeat Steps 2–5.

Falling headstock can crush or pinch. Keep column supported when loosening nut and adjusting tilt in following steps to prevent personal injury.

Loosen nut shown in Figure 29 and sup-

port weight of column with free hand (see Figure 30).

Install drawbar cover.

-24-

Figure 29. Location of column tilt nut.

Model G8689Z (Mfd. Since 07/23)

Using

Spindle Downfeed

The Model G8689Z is equipped with rapid and micro spindle downfeed controls, as shown in Figure 32. The rapid downfeed levers move the headstock up and down on the column quickly, similar to a drill press. The micro downfeed more precisely adjusts the headstock up and down.

Figure 30. Example of supporting column during

positioning.

3. Use column tilt scale to set column angle as desired (see Figure 31), then tighten nut from Step 2 to secure setting.

Note: If high degree of accuracy is required,

use additional methods for confirming tilt angle.

Column

Tilt Scale

Indicator

Rapid Downfeed

Lever

(1 of 3)

Micro Downfeed

Knob

Z-Axis

Lock

Handle

Figure 32. Spindle downfeed controls.

Using Rapid Downfeed

1. Loosen Z-axis lock handle (see Figure 32).

Pull downfeed lever hub out to disengage

2. teeth, as shown in Figure 33.

Figure 31. Location of column tilt scale and

indicator.

In order to tilt column back to 0°, you must tram spindle with table to ensure 90° alignment. Refer to Tramming Spindle on Page 37 for detailed instructions.

Model G8689Z (Mfd. Since 07/23)

Teeth

Hub

Figure 33. Hub teeth disengaged.

-25-

3. Move rapid downfeed handles to lower or raise headstock and spindle (see Figure 32).

Adjusting

— To secure headstock and spindle depth,

like when milling a flat surface across workpiece face, tighten Z-axis lock handle.

Using Micro Downfeed

This micro level of control makes it easy to set the spindle height so a precise amount of material can be removed from the workpiece. The graduated dial measures spindle movement in

0.001" increments, with one full revolution equal-

ing 0.060" of spindle travel.

To use micro downfeed:

Loosen Z-axis lock handle (see Figure 32).

Use rapid downfeed to adjust cutting tool just

above workpiece surface.

Push downfeed lever hub in to engage teeth,

as shown in Figure 34.

Note: Spindle may need to be rotated by

hand to allow micro downfeed to align with downfeed lever hub.

Depth Stop

The depth stop (see Figure 35) limits the downward movement of the headstock and cutting tool when performing repeated operations, like drilling the same size hole in multiple workpieces.

Z-Axis

Lock

Handle

Depth Stop

Lock Handle

Figure 35. Depth stop components.

To adjust depth stop:

Teeth

Hub

Figure 34. Hub teeth engaged.

4. Turn micro downfeed knob to adjust head-

stock and spindle to desired depth (see Figure 32).

— To secure headstock and spindle depth,

like when milling a flat surface across workpiece face, tighten Z-axis lock handle.

DISCONNECT MACHINE FROM POWER!

Move headstock to desired depth of cut, then

tighten Z-axis lock handle to secure (see Figure 35).

Loosen depth stop lock handle (see

3. Figure 35).

Slide depth stop (see Figure 35) so it sits

tight against bottom of headstock, then tighten depth stop lock handle to secure.

Note: Depth stop can lose its position after

repeated contact with headstock. To limit this possibility, make sure headstock only makes gentle contact with depth stop. Both rapid and micro downfeed controls can overpower depth stop if excessive force is used.

-26-

Model G8689Z (Mfd. Since 07/23)

Setting

Many variables affect the optimum spindle speed to use for any given operation important are the recommended cutting speed for the workpiece material and the diameter of the cutting tool, as noted below.

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

The "R

varies depending on the type of workpiece material. It is the

in order to

optimize tool life

The books

Machine

Shop Practice

vide excellent recommendations for which cutting speeds to use when calculating the spindle speed. The

also provide a wealth of additional information about the variables that affect cutting speed and

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

Using the correct spindle speed is important for safe and satisfactory results ing tool life.

To set the spindle speed for your operation, you will need to:

spindle speed for the cutting task, and 2) configure the spindle controls to match the closest spindle speed.

Spindle Speed

Setting Spindle Speed

The Model G8689Z has two spindle speed ranges: a low speed range that spans from 0–110 0 RPM and a high speed range that spans from 0–2500 RPM.

, as well as maximiz-

1) Determine the best

Determining Spindle Speed

, but the two most

*Recommended

Cutting Speed (FPM) x 12

Tool Dia. (in inches) x 3.14

Spindle

Speed (RPM)

*Double if using carbide cutting tool

Figure 36. Spindle speed formula for mill/drills.

To set spindle speed range:

Rotate spindle speed dial completely coun-

terclockwise and wait for spindle to completely stop.

DO NOT attempt to change speed range until spindle has come to complete stop, or spindle gearing will be damaged.

Move speed range lever to desired speed

range (see Figure 37).

Note: If speed range lever will not go into

gear, rotate spindle by hand while holding light pressure on lever. When gears engage, lever will slip into place.

Speed Range

Lever

Model G8689Z (Mfd. Since 07/23)

ecommended Cutting Speed"

ideal speed for cutting that material

and produce a desirable finish.

Machinery’s Handbook or

, and some internet sites, pro-

se sources

they are a good educational resource.

Figure 37. Location of speed range lever.

Move ON/OFF toggle switch to ON position,

then turn spindle speed dial clockwise to desired speed.

Note: Spindle speed dial must be rotated all

the way counterclockwise to reset spindle power after Emergency Stop button has been used or ON/OFF toggle switch has been moved to OFF position.

-27-

ACCESSORIES

Installing unapproved accessories may

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

SECTION 5: ACCESSORIES

cause machine to malfunction, resulting in serious personal injury or machine damage. To reduce this risk, only install accessories recommended for this machine by Grizzly.

NOTICE

Refer to our website or latest catalog for additional recommended accessories.

T26688—8 Pc. R8 Quick Change Collet Set

These EOC-25 collets are hardened and ground for maximum holding power and ultra precision. Threaded for maximum runout of 0.001". Set includes collet chuck, spanner wrench, molded plastic case, and collets of the following sizes:

⁄4", and 1".

⁄16"-20 drawbars, this set has a

⁄4", 5⁄16", 3⁄8", 1⁄2 ", 5⁄8",

H7576—Precision Self-Centering Vise

Both jaws on this precision vise move in equal and opposite directions so parts of various size remain centered as long as vise remains centered to the milling machine spindle. The precision-ground dovetailed ways and an adjustable gib provide ultra-smooth operation. The crank handle measures 4" long and slides on and off when needed.

Figure 39. H7576 Precision Self-Centering Vise.

SB1463—R8/JT33 Drill Chuck Arbor SB1464—R8/JT6 Drill Chuck Arbor SB1465 —R8/JT3 Drill Chuck Arbor

Minimal deviation in concentricity is ground into each and every one of these arbors to maximize accuracy and performance. Total indicated runout is from 0.00059" to 0.00079". Takes dr awbar.

⁄16"-20

Figure 38. T26688 8-Pc. R8 Collet Set.

-28-

Figure 40. SB1463 R8/JT33 Drill Chuck Arbor.

Model G8689Z (Mfd. Since 07/23)

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

G1075—58-Pc. Clamping Kit

This clamping kit includes: 24 studs, 6 step block pairs, 6 T-nuts, 6 flange nuts, 4 coupling nuts, and

6 end hold-downs. The Model G1075 set fits

T-slots and includes

⁄8"-16 studs. The rack can be

⁄2 "

bolted to the wall or side of the machine for easy access.

Figure 41. G1075 58-Pc. Clamping Kit.

T25615— Milling for Home Machinists

This is a project-based course book that provides a complete introduction to milling and the use of the milling machine. It assumes no prior knowledge and works through the process of using a home shop mill from beginning to end.

SB1365—South Bend Way Oil-ISO 68

Engineered for the high pressure exerted on horizontal or vertical ways and slides. Protects against rust and corrosion. Ensures stick-free, smooth motion which maximizes finishes and extends the life of your machine. Won’t gum up! 12 oz. AMGA#2 (ISO 68 Equivalent)

Figure 43. SB1365 Way Oil.

T26419—NLGI#2 Syn-O-Gen Synthetic Grease

Formulated with 100% pure synthesized hydrocarbon basestocks that are compounded with special thickeners and additives to make Syn-O-Gen non-melt, tacky, and water resistant. Extremely low pour point, extremely high temperature oxidation, and thermal stability produce a grease that is unmatched in performance.

Figure 44. T26419 Syn-O-Gen Synthetic

Grease.

Figure 42. T25615 Milling for Home Machinists.

Model G8689Z (Mfd. Since 07/23)

-29-

SECTION 6: MAINTENANCE

To reduce risk of shock or accidental startup, always disconnect machine from power before adjustments,

maintenance, or service.

Schedule

For optimum performance from this machine, this maintenance schedule must be strictly followed.

Ongoing

To minimize your risk of injury and maintain proper machine operation, shut down the machine immediately if you ever observe any of the items below, and fix the problem before continuing operations:

Cleaning &

Protecting

Swarf left on the machine that have been soaked with water-based coolant will invite oxidation and build-up around the moving parts. Use a brush and shop vacuum to remove swarf and debris from the working surfaces of the machine. The small chips leftover after vacuuming can be wiped up with a lightly oiled rag. Do not use compressed air to blow off chips, as this may drive them deeper into moving surfaces and could cause sharp chips to fly into your face or hands.

Protect the unpainted cast iron surfaces by wiping them clean after every use. Keep them rust-free with ISO 68 way oil.

• Loose mounting bolts.

• Damaged tooling.

• Worn or damaged wires. Any other unsafe condition.

•

Daily Maintenance

• Clean excess cutting fluids and chips and

protect unpainted surfaces.

• Lubricate column and table ways (Page 31).

• Lubricate column tilt components (Page 31).

Monthly Maintenance

• Lubricate leadscrews (Page 32).

• Clean and lubricate column rack (Page 32).

Lubrication

The machine has numerous moving metal-to-metal contacts that require regular and proper lubrication to ensure efficient and long-lasting operation.

Other than the lubrication points covered in this section, all other bearings are internally lubricated and sealed at the factory. Simply leave them alone unless they need to be replaced.

DISCONNECT MACHINE FROM POWER BEFORE LUBRICATING COMPONENTS!

Recommended lubrication is based on lightto-medium usage. Lubrication tasks may need to be performed more frequently than recommended, depending on usage.

-30-

Failure to follow reasonable lubrication practices as instructed in this manual could lead to premature failure of machine components and will void warranty.

Model G8689Z (Mfd. Since 07/23)

Table & Column Ways

Lubrication Type ... SB1365 or ISO 68 Equivalent Lubrication Amount Lubrication Frequency

Items Needed Qty

Phillips Head Screwdriver #2 ............................ 1

Shop Rags Mineral Spirits SB1365 or ISO 68 Equivalent

Move the way covers out of the way and clean the X-, Y-, and Z-axis ways (see Figures 45–47) with shop rags and mineral spirits to remove the grime and old lubrication. Allow the ways to dry, wipe the ways with ISO 68 oil, then move the components back and forth over the full range of travel to spread the lubricant and ensure smooth movement.

......................................... As Needed

..............................Thin Coat

................................. Daily

.................................... As Needed

............ As Needed

Z-Axis

Ways

Figure 47. Location of Z-axis ways.

Column Tilt Components

Lubrication Type ... SB1365 or ISO 68 Equivalent Lubrication Amount Lubrication Frequency

Items Needed Qty

SB1365 or ISO 68 Equivalent ............ As Needed

............................ 2–3 Drops

................................. Daily

X-Axis

Ways

Figure 45. Location of X-axis ways.

Y-Axis

Ways

Place a few drops of ISO 68 oil at the location shown in Figure 48 to lubricate column tilt components. Tilt column back and forth over full range of travel to spread lubricant and ensure smooth movement.

Figure 48. Column tilt lubrication location.

Figure 46. Location of Y-axis ways (way covers

removed).

Model G8689Z (Mfd. Since 07/23)

-31-

Leadscrews

Lubrication Type ... SB1365 or ISO 68 Equivalent Lubrication Amount Lubrication Frequency

..............................Thin Coat

.............................Monthly

Column Rack

Lubrication Type ... T26419 or NLGI#2 Equivalent Lubrication Amount Lubrication Frequency

..............................Thin Coat

.............................Monthly

Items Needed Qty

Phillips Head Screwdriver #2 ............................ 1

Stiff Brushes Mineral Spirits SB1365 or ISO 68 Equivalent

Move the way covers out of the way and clean the X- and Y-axis leadscrews (see Figures 49–50) with a brush and mineral spirits to remove the grime and old lubrication. Allow the leadscrews to dry, use a clean brush to wipe the leadscrew teeth with ISO 68 oil, then move the table back a forth several times over the full range of travel in each direction to spread the lubricant and ensure smooth movement.

...................................... As Needed

.................................... As Needed

............ As Needed

Items Needed Qty

Stiff Brushes ...................................... As Needed

Mineral Spirits T26419 or NLGI#2 Equivalent

Use mineral spirits and a stiff brush to remove the grime and old lubrication on the column rack (see Figure 51), moving the headstock up and down as needed. Allow the rack to dry, use a clean brush to wipe a thin coat of grease over the rack teeth, then move the headstock up and down several times over the full range of travel to spread the grease and ensure smooth movement.

.................................... As Needed

........... As Needed

Column

Rack

X-Axis

Leadscrew

Figure 49. Location of X-axis leadscrew.

Y-Axis

Leadscrew

Figure 50. Location of Y-axis leadscrew (way

covers removed).

Figure 51. Location of column rack.

-32-

Model G8689Z (Mfd. Since 07/23)

Review the troubleshooting procedures in this section if a problem develops with your machine. If you need

the

serial number and manufacture date of your machine before calling.

SECTION 7: SERVICE

replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather

Troubleshooting

Motor & Electrical

Symptom Possible Cause Possible Solution

Machine does not start, or power supply breaker immediately trips after startup.

Machine stalls or is underpowered.

Machine has vibration or noisy operation.

1. Emergency Stop button cover depressed/at fault.

2. Spindle power needs to be reset.

3. Blown machine fuse.

4. Incorrect power supply voltage or circuit size.

5. Spindle speed dial or potentiometer at fault.

6. Power supply circuit breaker or fuse blown.

7. Wiring broken, disconnected, or corroded.

8. Motor brushes worn out.

9. ON/OFF toggle switch at fault.

10. Circuit board at fault.

11. Motor or motor bearings at fault.

1. Wrong workpiece material.

2. Machine undersized for task.

3. Extension cord too long.

4. Motor overheated.

5. Motor brushes worn out.

6. Gear drive at fault.

7. Circuit board at fault.

8. Spindle speed potentiometer at fault.

9. Motor or motor bearings at fault.

1. Motor or component loose.

2. Incorrectly mounted to workbench.

3. Spindle loose, improperly installed, or damaged.

4. Gear drive at fault.

5. Spindle bearings at fault.

6. Motor bearings at fault.

1. Remove Emergency Stop button cover to reset. Replace if at fault.

2. Turn spindle speed dial all the counterclockwise to reset (Page 4).

3. Replace fuse (Page 36)/ensure no shorts.

4. Ensure correct power supply voltage and circuit size (Page 11).

5. Test/replace if at fault.

6. Ensure circuit is free of shorts. Reset circuit breaker or replace fuse.

7. Fix broken wires or disconnected/corroded connections (Page 39).

8. Replace motor brushes (Page 36).

9. Replace switch.

10. Inspect/replace if at fault.

11. Replace motor.

1. Use correct size/type of material (Page 6).

2. Use correct cutter/bit; reduce feed rate; reduce spindle RPM (Page 27); use cutting ﬂuid if possible.

3. Move machine closer to power supply; use shorter extension cord (Page 12).

4. Clean motor, let cool, and reduce workload. Clear cooling fan outlet if obstructed.

5. Replace motor brushes (Page 36).

6. Replace broken or slipping gears.

7. Inspect and replace if at fault.

8. Test and replace if at fault.

9. Replace motor.

1. Replace damaged or missing bolts/nuts or tighten if loose.

2. Tighten mounting hardware or shim.

3. Tighten loose spindle, re-install spindle ensuring mating surfaces are clean, replace spindle if damaged.

4. Replace broken or slipping gears.

5. Test by rotating spindle; rotational grinding/loose shaft requires bearing replacement.

6. Test by rotating shaft; rotational grinding/loose shaft requires bearing replacement.

Model G8689Z (Mfd. Since 07/23)

-33-

Operation

Symptom Possible Cause Possible Solution

Tool loose in spindle.

Breaking tools or cutters.

Workpiece or tool vibrates or chatters during operation.

Table hard to move.

Headstock hard to move.

Bad surface ﬁnish.

Cutting result not square.

Spindle overheats.

1. Cutter/tooling loose.

2. Cutting tool holder not fully drawn up into spindle taper.

3. Debris on cutting tool holder or in spindle taper.

4. Taking too big of a cut.

1. Spindle speed too fast for depth of cut, cutting tool size, or workpiece material.

2. Improper or no lubricant/cutting tool getting too hot.

3. Dull/incorrect cutting tool.

4. Cutting tool too small.

5. Taking too big of a cut.

1. Table (X-/Y-axis) lock handles not tight.

2. Workpiece not secure.

3. Spindle speed/feed rate too fast.

4. Gibs too loose in table.

5. Bit chattering.

6. Chuck/cutter at fault.

1. Table (X-/Y-axis) lock handles tightened down.

2. Chips loaded up on ways.

3. Table ways need lubrication.

4. Gibs too tight.

5. X-/Y-axis leadscrews binding.

1. Headstock (Z-axis) lock handle tightened down.

2. Downfeed lever hub teeth are engaged/ disengaged.

3. Chips loaded up on column ways.

4. Column ways and rack need lubrication.

5. Gib too tight.

6. Headstock counterbalance spring at fault.

1. Spindle speed/feed rate too fast.

2. Workpiece not secure.

3. Dull/incorrect cutting tool.

4. Cutting tool is designed for wrong rotation direction.

1. Spindle not exactly 90° to table.

2. Table travel inconsistent.

1. Machine operated at maximum speed for extended period.

2. Poor spindle bearing lubrication.

1. Secure cutter/tooling.

2. Tighten drawbar (Page 22).

3. Clean cutting tool holder and spindle taper (Page 22).

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

1. Reduce spindle speed (Page 27); reduce feed rate; take lighter cut.

2. Use proper lubricant for operation.

3. Sharpen/replace cutting tool; select better tool for operation.

4. Use larger cutting tool and slower feed rate.

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

1. Tighten table lock handles (Page 21).

2. Properly clamp workpiece on table or in vise.

3. Reduce spindle speed (Page 27); reduce feed rate.

4. Tighten gibs (Page 35).

5. Replace/sharpen bit; index bit to workpiece; reduce feed rate.

6. Replace unbalanced chuck; replace/sharpen cutter.

1. Loosen table lock handles (Page 21).

2. Frequently clean away chips during operations.

3. Lubricate ways (Page 31).

4. Loosen gibs (Page 35).

5. Clean and lubricate leadscrews (Page 32); adjust X-axis leadscrew backlash (Page 36).

1. Loosen headstock lock handle (Page 25).

2. Disengage downfeed lever hub teeth for rapid downfeed; engage downfeed lever hub teeth for micro downfeed (Page 25).

3. Frequently clean away chips during operations.

4. Clean/lubricate ways (Page 31) and rack (Page 32).

5. Loosen gib (Page 35).

6. Replace spring assembly. DO NOT attempt to make adjustments to this spring to avoid personal injury. It is under high tension and will easily uncoil.

1. Reduce spindle speed (Page 27); reduce feed rate.

2. Properly clamp workpiece on table or in vise.

3. Sharpen/replace cutting tool; select better tool for operation.

4. Check/replace with tool designed for correct rotation direction.

1. Tram spindle (Page 37).

2. Adjust gibs (Page 35).

1. Allow machine to cool; avoid operating at maximum speed for long times.

2. Replace spindle bearings.

-34-

Model G8689Z (Mfd. Since 07/23)

Adjusting Gibs

The gibs affect the accuracy of the work table by restricting slide movements along their ways.

Three screws and jam nuts on each gib allow gib adjustments to increase or decrease the friction between the sliding surfaces of the ways.

— For Y-axis gib, adjust (2) screws shown in

Figure 53 and use Y-axis handwheel to test gib adjustment.

The goal of gib adjustment is to remove unnecessary sloppiness without causing binding in the dovetail ways. Tight gibs make the movements more accurate, but harder to perform. Loose gibs make the movements sloppy, but easier to perform. Many experienced machinists adjust the gibs until there is just a slight drag in table movement.

Tools Needed Qty

Open-End Wrench 10mm .................................. 1

Hex Wrench 3mm

To adjust gibs:

DISCONNECT MACHINE FROM POWER!

Use hex wrench to prevent set screws from

moving while loosening jam nuts on gib you wish to adjust (see Figures 52–54).

Slightly adjust gib set screws an equal

amount.

.............................................. 1

x 2

Figure 53. Location of Y-axis gib screws and

jam nuts.

— For Z-axis gib, adjust (4) screws shown in

Figure 54 and use rapid downfeed levers to test gib adjustments.

— For X-axis gib, adjust (4) screws shown in

Figure 52 and use X-axis handwheel to test gib adjustment.

x 4

Figure 52. Example of adjusting X-axis gib.

Model G8689Z (Mfd. Since 07/23)

x 4

Figure 54. Location of Z-axis gib screws and

jam nuts.

When you are satisfied with gib adjustment,

tighten jam screws without moving gib set screws.

-35-

Adjusting X-Axis

Leadscrew Backlash

Leadscrew backlash is the amount of free-play movement in the leadscrew (when changing the direction of rotation) before the attached device begins to move.

Leadscrews must have a certain amount of backlash, but over time, this will increase with normal wear. Generally, 0.003"–0.006" leadscrew backlash is acceptable to ensure smooth movement and reduce the risk of premature thread wear.

The X-axis leadscrew backlash is adjusted by tightening/loosening the set screws that contact the leadscrew nut through the saddle. This adjusts the force that the leadscrew nut exerts on the leadscrew threads.

The X-axis leadscrew backlash set screws are accessed from underneath the right side of the table (see Figure 55).

Replacing Fuse

This machine features a fuse designed to protect sensitive electrical parts in the event of electrical overload. If the fuse burns out, replace it.

Items Needed Qty

Phillips Head Screwdriver #2 ............................ 1

Replacement Fuse 5A 250V (P8689Z411-10)

To replace fuse:

DISCONNECT MACHINE FROM POWER!

Turn fuse holder cap counterclockwise to

remove (see Figure 56).

Fuse Holder

Cap

.... 1

x 2

Figure 55. Location of X-axis leadscrew back-

lash set screws.

Tool Needed Qty

Hex Wrench 3mm .............................................. 1

Figure 56. Location of fuse holder cap.

Replace fuse, install fuse holder cap, and turn

clockwise to secure.

Replacing

Motor Brushes

This machine is equipped with a DC motor that uses carbon brushes to transmit electrical current. These brushes are considered to be regular "wear items" or "consumable" that will need to be replaced during the life of the motor. The frequency of required replacement is often related to how much the motor is used and how hard it is pushed.

Replace both carbon brushes at the same time when the motor no longer reaches full power, or when the brushes measure less than (new brushes are

⁄8").

⁄4" long

-36-

Model G8689Z (Mfd. Since 07/23)

Items Needed Qty

Flat Head Screwdriver 3⁄16" ................................ 1

Replacement Brush Pair (P8689Z427-2)

........... 1

Tramming Spindle

To replace motor brushes:

1. DISCONNECT MACHINE FROM POWER!

Turn each brush cap counterclockwise to

remove (see Figure 57).

Brush Cap

(1 of 2)

Figure 57. Location of brush caps.

Remove and inspect old brush assemblies

(see Figure 58).

After positioning the column at an angle and when your operation requires that the spindle axis be precisely perpendicular to the table, you must tram or align the spindle with the table to ensure the spindle is exactly 90° to the table.

This procedure involves mounting a dial test indicator to the spindle, rotating it around the table, and adjusting the spindle axis (Z-axis) 90° to the table X-axis, as illustrated in Figure 59.

Spindle

Z-Axis

90º

X-Axis

Table

— If brushes are intact and longer than 1⁄4",

brushes does not need to be replaced.

— If either brush is broken or worn down to

less than 1⁄4", replace both assemblies with new ones.

Brush

Assembly

Figure 58. Removing brush assembly.

Install brush assemblies, then secure with

brush caps.

Figure 59. Spindle Z-axis perpendicular to table

X-axis.

We encourage you to research the many variations of spindle tramming to find the one that works best for you. If you do not already have a preference for performing this operation, use the following widely used procedure for accurately tramming the spindle to the table.

Keep in mind that all workpiece top surfaces are not exactly parallel with the table top. You may choose to tram the spindle to the top surface of the workpiece after it is mounted rather than tramming the spindle to the table.

Items Needed Qty

Dial Test Indicator (w/at least 0.0005" resolution) Indicator Holder (mounted on the quill/spindle) Precision Parallel Block (at least 9" in length)

.......................................... 1

........................... 1

Model G8689Z (Mfd. Since 07/23)

-37-

Note: A precision-ground plate can be substituted for the parallel blocks. Keep in mind that the farther the indicator point can be placed from the spindle axis, the more accurate the alignment measurements will be.

Note: If you must re-position headstock to

accommodate above step, then review tasks in Step 2 to make sure machine is properly prepared for tramming.

To tram spindle to table:

DISCONNECT MACHINE FROM POWER!

2. Prepare machine for tramming by performing

following tasks:

• Verify table is clean by running your hand over top of it. If necessary, stone table to remove all nicks and burrs, then clean off all debris.

• Position table for milling operation you intend to perform after tramming—preferably centered with headstock.

• Tighten Z-axis lock handle.

3. Place parallel block underneath spindle.

4. Install indicator holder in spindle, then mount

indicator so that point is as parallel to block as possible (see Figure 60).

Parallel Block

Spindle

Dial Test Indicator

Table

Figure 61. Parallel block and indicator positioned

for X-axis measurement.

Note: Your general goal in next steps should

be to compare indicator readings between two ends of parallel block down to 0.0005". However, acceptable variance will depend on requirements for operation.

Rotate spindle by hand so that indicator point

rests on one end of parallel block, as illustrated in Figures 60–61, then zero dial.

Spindle

Dial Test Indicator

Indicator

Holder

Parallel Block

Table

Figure 60. Dial test indicator mounted.

5. To measure spindle alignment along X-axis,

place parallel block directly under spindle and indicator across length of table, as illustrated in Figure 61.

Rotate spindle so that indicator point rests

in same manner on other end of block, then read dial.

— If indicator dial still reads zero or is within

acceptable variance, spindle is precisely perpendicular to table in X-axis and tramming procedure is complete.

— If indicator dial has moved from zero

beyond acceptable variance, you will need to compensate for that amount by tilting column left or right. Repeat Steps 6–7 until you are satisfied with spindle axis alignment along table X-axis.

-38-

Model G8689Z (Mfd. Since 07/23)

These pages are current at the time of printing. However, in the spirit of improvement, we may make changes to the electrical systems of future machines. Compare the manufacture date of your machine to the one

number and manufacture date of your

machine before calling. This information can be found on the main machine label.

machine

SECTION 8: WIRING

stated 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 updated wiring diagram may be available. Note: Please gather the serial

Wiring Safety Instructions

SHOCK HAZARD. Working on wiring that is con-

nected to a power source is extremely dangerous. Touching electrified parts will result in personal injury including but not limited to severe burns, electrocution, or death. Disconnect the power from the machine before servicing electrical components!

MODIFICATIONS. Modifying the wiring beyond what is shown in the diagram may lead to unpredictable results, including serious injury or fire. This includes the installation of unapproved aftermarket parts.

WIRE CONNECTIONS. All connections must be tight to prevent wires from loosening during machine operation. Double-check all wires disconnected or connected during any wiring task to ensure tight connections.

CIRCUIT REQUIREMENTS. You MUST follow the requirements at the beginning of this manual when connecting your machine to a power source.

WIRE/COMPONENT DAMAGE. Damaged wires or components increase the risk of serious personal injury, fire, or machine damage. If you notice that any wires or components are damaged while performing a wiring task, replace those wires or components.

MOTOR WIRING. The motor wiring shown in these diagrams is current at the time of printing but may not match your machine. If you find this to be the case, use the wiring diagram inside the motor junction box.

CAPACITORS/INVERTERS. Some capacitors and power inverters store an electrical charge for up to 10 minutes after being disconnected from the power source. To reduce the risk of being shocked, wait at least this long before working on capacitors.

EXPERIENCING DIFFICULTIES. If you are experiencing difficulties understanding the information included in this section, contact our Technical Support at (570) 546-9663.

The photos and diagrams included in this section are best viewed in color. You can view these pages in color at www.grizzly.com.

Model G8689Z (Mfd. Since 07/23)

-39-

P4 P3 P2 P1

Circuit Board

FC350BJ/110V

7 6 5

4 2

AC4

AC3

DC2

DC1

Wiring Diagram

4 2

AC/L

Circuit Board

FC-04F

DC12V/110V

DC- DC+

−

AC/N

Spindle Power

Reset

Indicator

ZD10

Fan

SUNJUN

SJ5010

DC12V 0.18A

110V MOTOR

ELECTRICAL BOX

110 VAC

5-15 Plug

Neutral

Hot

Ground

Power Indicator

ZD10

−

Emergency Stop Button

KEDU 02A1131

CONTROL PANEL

762

Potentiometer

WH24-2 4.7K

A B

ON/OFF Toggle Switch

KEDU KNI-302

Fuse Holder

BF021

-40-

READ ELECTRICAL SAFETY

ON PAGE 39!

Model G8689Z (Mfd. Since 07/23)

Electrical Component Photos

Figure 63. Control box wiring.

Figure 62. Electrical box wiring.

Model G8689Z (Mfd. Since 07/23)

READ ELECTRICAL SAFETY

ON PAGE 39!

-41-

SECTION 9: PARTS

We do our best to stock replacement parts when possible, but we cannot guarantee that all parts shown are available for purchase. Call (800) 523-4777 or visit www.grizzly.com/parts to check for availability.

Table

-42-

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

Model G8689Z (Mfd. Since 07/23)

Table Parts List

REF P ART # DES CRIPTI ON REF P ART # DES CRIP TI ON

1 P8689Z001 BASE 22 P8689Z022 SET SCREW M6-1 X 10 2 P8689Z002 Y-AXIS LEADSCREW 23 P8689Z023 X-AXIS LEADSCREW NUT 3 P8689Z003 KEY 4 X 4 X 16 24 P8689Z024 HOLDING PLATE 4 P8689Z004 DIAL 25 P8689Z025 WAY COVER REAR 5 P8689Z005 HANDWHEEL TYPE-18 100D X 10B-K X M8-1.25 26 P8689Z026 Y-AXIS LEADSCREW SEAT 7 P8689Z007 HOLLOW HANDLE 19 X 40, 8 27 P8689Z027 CAP SCREW M6-1 X 16 8 P8689Z008 PHLP HD SCR M8-1.25 X 55 SLOTTED 28 P8689Z028 SET SCREW M6-1 X 22 9 P8689Z009 PHLP HD SCR M6-1 X 8 29 P8689Z029 HEX NUT M6-1 10 P8689Z010 HOLDING PLATE 30 P8689Z030 ADJUSTABLE HANDLE M8-1.25 X 16, 27L 11 P8689Z011 WAY COVER FRONT 31 P8689Z031 PHLP HD SCR M6-1 X 10 12 P8689Z012 HOLDING PLATE 32 P8689Z032 POINTER 13 P8689Z013 BALL BEARING 8200 33 P8689Z033 PHLP HD SCR M6-1 X 8 14 P8689Z014 FLAT WASHER 8MM 34 P8689Z034 Y-AXIS GIB 15 P8689Z015 HEX NUT M8-1.25 35 P8689Z035 SADDLE 16 P8689Z016 X-AXIS SCALE 36 P8689Z036 X-AXIS GIB 17 P8689Z017 CAP SCREW M6-1 X 16 37 P8689Z037 Y-AXIS LEADSCREW NUT 18 P8689Z018 X-AXIS BEARING SEAT 38 P8689Z038 CAP SCREW M6-1 X 25 19 P8689Z019 WORK TABLE 42 P8689Z042 POINTER 20 P8689Z020 X-AXIS LEADSCREW 92 P8689Z092 FLAT SPRING 21 P8689Z021 END COVER

Model G8689Z (Mfd. Since 07/23)

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

-43-

Headstock

421

444

446

427-1

411-1

411-14

411-13

411-2

411-12

460

409

408

411-3

363

362

361

305

458

407

411

364

360

404

442

411-4

411-7

411-8

411-9

411-11

429

447

405

441

443

411-5

302

428

430

431

330

329

343

406

414

413 439 415

411-6

411-10

440

304

438

466

467

468

469

470

422

381

307

416

306

423

448

301

432

471 472

427

375

439

421

418

420

379

422

419

426

382

384

349

351

383

356

352

386

310

311

482

350

308

309

481

427-2

355

396

397

385

387

398

354

399

388

395

303

353

389

400

357

358

359

390

394

391

393

392

401

-44-

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

Model G8689Z (Mfd. Since 07/23)

Headstock Parts List

REF P ART # REF P ART # DES CRIPTI ON

301 P8689Z301 KEY 3 X 3 X 16 408 P8689Z408 STUD-DE M8-1 X 70, 20 302 P8689Z302 SPACER 9.2 X 14 X 3MM 409 P8689Z409 KNOB M8-1, D15 TAPERED 303 P8689Z303 FLAT WASHER 6 X 16 X 4MM 411 P8689Z411 CONTROL BOX ASSEMBLY 304 P8689Z304 FLAT WASHER 5MM 411-1 P8689Z411-1 LAMP ZD10 GREEN 305 P8689Z305 HEX NUT M8-1.25 411-2 P8689Z411-2 CONTROL BOX COVER 306 P8689Z306 SET SCREW M6-1 X 8 CONE-PT 411-3 P8689Z411-3 CONTROL BOX 307 P8689Z307 KEY 4 X 4 X 8 411-4 P8689Z411-4 STRAIN RELIEF TYPE-4 M20 308 P8689Z308 HEX NUT M12-1.75 THIN 411-5 P8689Z411-5 POTENTIOMETER WH24-2 4.7K 309 P8689Z309 FLAT WASHER 12 X 18 X 1MM 411-6 P8689Z411-6 SPINDLE SPEED DIAL 310 P8689Z310 BUSHING 411-7 P8689Z411-7 STRAIN RELIEF TYPE-4 M12 311 P8689Z311 DRAWBAR 7/16-20 X 5/8, 4-1/4 411-8 P8689Z411-8 SET SCREW M2-.4 X 3 SLOTTED 329 P8689Z329 HEX NUT M6-1 THIN 411-9 P8689Z411-9 TOGGLE SWITCH KEDU KNI-302 330 P8689Z330 ADJUSTABLE HANDLE M8-1.25 X 16, 27L 411-10 P8689Z411-10 FUSE 5A 250V 0.25" FAST-ACTING, GLASS 343 P8689Z343 SET SCREW M6-1 X 22 DOG-PT 411-11 P8689Z411-11 FUSE HOLDER BF021 6A 250VAC 349 P8689Z349 SPINDLE BOX 411-12 P8689Z411-12 PHLP HD SCR M5-.8 X 8 350 P8689Z350 PINION 411-13 P8689Z411-13 E-STOP BUTTON KEDU 02A1131 351 P8689Z351 KEY 4 X 4 X 25 411-14 P8689Z411-14 TAP SCREW M2.8 X 6.5 352 P8689Z352 BEVEL GEAR 29T 413 P8689Z413 IDLER SHAFT 353 P8689Z353 EXT RETAINING RING 12MM 414 P8689Z414 KEY 3 X 3 X 45 354 P8689Z354 STEEL BALL 5MM 415 P8689Z415 EXT RETAINING RING 12MM 355 P8689Z355 COMPRESSION SPRING 0.4 X 0.8 X 10MM 416 P8689Z416 SPACER 30.2 X 41 X 7.5MM 356 P8689Z356 SET SCREW M6-1 X 8 418 P8689Z418 SPACER 30 X 42 X 32MM 357 P8689Z357 DOWNFEED LEVER HUB 419 P8689Z419 SPANNER NUT M27-1.5 358 P8689Z358 STUD-UDE M8-1 X 120, 20, 10 420 P8689Z420 KEY 5 X 5 X 20 359 P8689Z359 KNOB M8-1, D12 TAPERED 421 P8689Z421 CAP SCREW M5-.8 X 8 360 P8689Z360 CAP SCREW M8-1.25 X 25 422 P8689Z422 BEARING COVER 361 P8689Z361 POINTER 423 P8689Z423 BALL BEARING 6206ZZ 362 P8689Z362 SET SCREW M8-1.25 X 25 DOG-PT 426 P8689Z426 DRAWBAR COVER 363 P8689Z363 SPINDLE BOX SEAT 427 P8689Z427 MOTOR 1/2HP 110VDC 364 P8689Z364 Z-AXIS GIB 427-1 P8689Z427-1 BRUSH CAP 375 P8689Z375 CAP SCREW M6-1 X 20 427-2 P8689Z427-2 CARBON BRUSH ASSEMBLY (2-PC) 379 P8689Z379 SPINDLE R8 428 P8689Z428 MOTOR GEAR 14T 381 P8689Z381 SUPPORT BLOCK 429 P8689Z429 EXT RETAINING RING 9MM 382 P8689Z382 CAP SCREW M5-.8 X 20 430 P8689Z430 MOTOR SEAT 383 P8689Z383 ROLL PIN 4 X 14 431 P8689Z431 FLAT HD SCR M6-1 X 12 384 P8689Z384 WORM SHAFT 432 P8689Z432 PHLP HD SCR M5-.8 X 10 385 P8689Z385 SLEEVE 438 P8689Z438 GEAR 30T 386 P8689Z386 STEEL PIN 3 X 11 439 P8689Z439 BALL BEARING 6001ZZ 387 P8689Z387 STEEL PIN 3 X 14 440 P8689Z440 TRANSMISSION GEAR 388 P8689Z388 ADJUSTABLE UNION 441 P8689Z441 SHIFT FORK 389 P8689Z389 MICRO DOWNFEED BRACKET 442 P8689Z442 GEAR SHIFT LINK 390 P8689Z390 CAP SCREW M5-.8 X 25 443 P8689Z443 SET SCREW M5-.8 X 8 391 P8689Z391 DIAL 444 P8689Z444 TAP SCREW M2.9 X 8 392 P8689Z392 FLAT SPRING 446 P8689Z446 MOTOR COVER 393 P8689Z393 MICRO DOWNFEED DIAL 447 P8689Z447 MOTOR FLANGE 394 P8689Z394 SET SCREW M5-.8 X 16 CONE-PT 448 P8689Z448 PHLP HD SCR M6-1 X 10 395 P8689Z395 MICRO DOWNFEED SHAFT 458 P8689Z458 STANDOFF-HEX MF M10-1.5 X 8, M8-1.25 396 P8689Z396 MICRO DOWNFEED COVER 460 P8689Z460 SHOULDER BOLT M8-1.25 X 13, 11 X 12 397 P8689Z397 PHLP HD SCR M4-.7 X 6 466 P8689Z466 GEAR 21T 398 P8689Z398 CHIP GUARD MOUNT 467 P8689Z467 BUSHING 399 P8689Z399 CAP SCREW M5-.8 X 16 468 P8689Z468 GEAR 29T 400 P8689Z400 CHIP GUARD 469 P8689Z469 SPACER 35.1 X 42 X 17.5MM 401 P8689Z401 THUMB SCREW M6-1 X 12, KD 470 P8689Z470 BALL BEARING 80107ZZ 404 P8689Z404 SET SCREW M6-1 X 16 471 P8689Z471 KEY 5 X 5 X 16 405 P8689Z405 COMPRESSION SPRING 1.5 X 5 X 13MM 472 P8689Z472 KEY 5 X 5 X 28 406 P8689Z406 STEEL BALL 5MM 481 P8689Z481 DRILL CHUCK JT33 1/32"-1/2" 407 P8689Z407 SHIFT LEVER HUB 482 P8689Z482 ARBOR R8 X JT33

Model G8689Z (Mfd. Since 07/23)

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

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652

672

Column

663

662

657

569-2

569-13

569-12

569-11

569-14

659

569-1

569-10

655

662

656

569

569-6

569-9

661

569-3

569-4

569-5

569-7

569-8

688

632

567

568

570

654

571

653

664

572

602

501

651

545

517

603

691

546

547

544

539

686

673

674

676

566

530

565

543

686

542

683 684

675

680

541

540 685

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689

690

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

679

677678

Model G8689Z (Mfd. Since 07/23)

Column Parts List

REF PART # DE S CRIPTION REF P ART # DES CRIPTION

501 P8689Z501 SET SCREW M5-.8 X 6 CONE-PT 572 P8689Z572 CONNECTING STRUT 517 P8689Z517 CAP SCREW M6-1 X 16 602 P8689Z602 SPACER 7 X 17 X 16MM 530 P8689Z530 ADJUSTABLE HANDLE M8-1.25 X 16, 27L 603 P8689Z603 CAP SCREW M6-1 X 16 539 P8689Z539 PIVOT PLATE 632 P8689Z632 PHLP HD SCR M5-.8 X 10 540 P8689Z540 LOCK WASHER 10MM 651 P8689Z651 LOCK COLLAR 541 P8689Z541 CAP SCREW M10-1.5 X 30 652 P8689Z652 ROTOR SHAFT 542 P8689Z542 POINTER 653 P8689Z653 KEY 4 X 4 X 6 543 P8689Z543 SET SCREW M6-1 X 22 DOG-PT 654 P8689Z654 SPRING SUPPORT 544 P8689Z544 COLUMN TILT SCALE 655 P8689Z655 TORSION SPRING 545 P8689Z545 TILT GIB 656 P8689Z656 SPRING HOUSING 546 P8689Z546 GEAR RACK 11" 657 P8689Z657 ACORN NUT M8-1.25 547 P8689Z547 CAP SCREW M6-1 X 16 659 P8689Z659 SUPPORT GUIDE 565 P8689Z565 DEPTH STOP 661 P8689Z661 SLEEVE 566 P8689Z566 DEPTH STOP GIB 662 P8689Z662 FLAT WASHER 8MM 567 P8689Z567 Z-AXIS SCALE 663 P8689Z663 SPRING COVER 568 P8689Z568 COLUMN 664 P8689Z664 COLUMN COVER 569 P8689Z569 ELECTRICAL BOX ASSEMBLY 672 P8689Z672 HEX WRENCH 3MM 569-1 P8689Z569-1 STRAIN RELIEF TYPE-4 M20 673 P8689Z673 HEX WRENCH 4MM 569-2 P8689Z569-2 ELECTRICAL BOX 674 P8689Z674 HEX WRENCH 5MM 569-3 P8689Z569-3 LAMP ZD10 YELLOW 675 P8689Z675 HEX WRENCH 6MM 569-4 P8689Z569-4 FLAT HD SCR M4-.7 X 20 676 P8689Z676 DRILL CHUCK KEY 5/16" TH 11T SD-9/16" 569-5 P8689Z569-5 FAN SUNJUN SJ5010 DC12V 0.18A 677 P8689Z677 OIL BOTTLE 569-6 P8689Z569-6 CIRCUIT BOARD FC350BJ/110V 678 P8689Z678 T-SLOT NUT 1/2", 3/8"-16 569-7 P8689Z569-7 CIRCUIT BOARD FC-04F DC12V/110V 679 P8689Z679 SPANNER WRENCH 45-52MM 569-8 P8689Z569-8 TAP SCREW M2.9 X 6.5 680 P8689Z680 SPINDLE LOCKING PIN 569-9 P8689Z569-9 ELECTRICAL BOX COVER 683 P8689Z683 PIVOT SHAFT 569-10 P8689Z569-10 CORD CLAMP 684 P8689Z684 KEY 8 X 8 X 12 569-11 P8689Z569-11 PHLP HD SCR M4-.7 X 6 685 P8689Z685 FLAT WASHER 10MM 569-12 P8689Z569-12 HEX NUT M4-.7 686 P8689Z686 RIVET 2 X 4MM NAMEPLATE, ALUMINUM 569-13 P8689Z569-13 PHLP HD SCR M5-.8 X 8 688 P8689Z688 WRENCH 8 X 10MM OPEN-ENDS 569-14 P8689Z569-14 TAP SCREW M2.9 X 6.5 689 P8689Z689 WRENCH 14 X 17MM OPEN-ENDS 570 P8689Z570 LOCK NUT M24-3 690 P8689Z690 WRENCH 17 X 19MM OPEN-ENDS 571 P8689Z571 FLANGE 10MM 691 P8689Z691 WRENCH 36MM OPEN-END

Model G8689Z (Mfd. Since 07/23)

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

-47-

NOTICE

701

703

ONLY change spindle speed range when spindle is completely stopped.

702

Speed Range

HIGH

LOW

Labels & Cosmetics

WARNING!

To reduce risk of death or serious injury, read manual BEFORE using machine. To get a new manual, call (800) 523-4777 or go to www.grizzly.com.

WARNING! WARNING!

ENTANGLEMENT

HAZARD! Tie back long hair, roll up long sleeves, and remove loose clothing, jewelry, or gloves to prevent getting caught in moving parts.

EYE/FACE INJURY

Always wear ANSI-approved safety glasses and face shield when using this machine.

HAZARD!

WARNING!

INJURY/SHOCK

HAZARD!

Disconnect power before adjustments, maintenance, or service.

NOTICE

FOLLOW SPINDLE

BREAK-IN PROCEDURES

BEFORE OPERATING

THIS MACHINE!

Failure to follow spindle break-in procedures in your manual will reduce machine life and may void warranty.

709

Hi-

Lo-

RPM

ON OFF

Fuse

705

704

705

706

To reduce risk of serious personal injury when using this machine:

1. Read and understand owner’s manual before operating.

2. Always wear approved safety glasses AND a face shield.

3. Only plug power cord into a grounded outlet.

4. Disconnect power before setting up, adjusting, or servicing.

5. Tie back long hair, roll up sleeves, and DO NOT wear loose

6. Keep all guards and covers in place during operation.

7. Never use hands to secure workpiece to table during

8. Avoid positioning hands where they could slip into rotating bits.

9. Never attempt to slow or stop spindle with hands or tools.

10. Always use proper feeds and speeds for operation and workpiece.

11. Prevent unauthorized use by children or untrained users.

WARNING!

clothing, gloves, or jewelry.

operation—use clamps or a vise.

707

2500 1100

MODEL G8689Z

4" X 16" MINI

MILLING MACHINE

Specifications

Motor: 1/2 HP, 110V, 1-Ph, 60 Hz Full-Load Current Rating: 4.5A Max. Distance Spindle to Column: 6-3/8" Max. Distance Spindle to Table: 10-1/2" Spindle Taper: R-8 Spindle Speeds (L/H): 0–1100, 0–2500 RPM Drawbar Size: 7/16"-20 x 4-5/16" Weight: 101 lbs.

Mfd. for Grizzly in China

Date

S/N

708

REF P ART # DES CRIPTION REF PART # DE S CRIPTI ON

701 P8689Z701 SPEED RANGE NOTICE LABEL 706 P8689Z706 WARNING LIST LABEL 702 P8689Z702 HIGH/LOW LABEL 707 P8689Z707 MACHINE ID LABEL 703 P8689Z703 COMBO WARNING LABEL 708 P8689Z708 CONTROL PANEL LABEL 704 P8689Z704 TOUCH-UP PAINT, GRIZZLY GREEN 709 P8689Z709 SPINDLE BREAK-IN HANG TAG 705 P8689Z705 ELECTRICITY LABEL

Safety labels help reduce the risk of serious injury caused by machine hazards. If any label comes off or becomes unreadable, the owner of this machine MUST replace it in the original location before resuming operations. For replacements, contact (800) 523-4777 or www.grizzly.com.

-48-

BUY PARTS ONLINE AT GRIZZLY.COM !

Scan QR code to visit our Parts Store.

Model G8689Z (Mfd. Since 07/23)

WARRANTY & RETURNS

Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original purchaser from the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse, negligence, accidents, repairs or alterations or lack of maintenance. This is Grizzly’s sole written warranty and any and all warranties that may be implied by law, including any merchantability or fitness, for any particular purpose, are hereby limited to the duration of this written warranty. We do not warrant or represent that the merchandise complies with the provisions of any law or acts unless the manufacturer so warrants. In no event shall Grizzly’s liability under this warranty exceed the purchase price paid for the product and any legal actions brought against Grizzly shall be tried in the State of Washington, County of Whatcom.

We shall in no event be liable for death, injuries to persons or property or for incidental, contingent, special, or consequential damages arising from the use of our products.

The manufacturers reserve the right to change specifications at any time because they constantly strive to achieve better quality equipment. We make every effort to ensure that our products meet high quality and durability standards and we hope you never need to use this warranty.

In the event you need to use this warranty, contact us by mail or phone and give us all the details. We will then issue you a “Return Number,’’ which must be clearly posted on the outside as well as the inside of the carton. We will not accept any item back without this number. Proof of purchase must accompany the merchandise.

Please feel free to write or call us if you have any questions about the machine or the manual.

Thank you again for your business and continued support. We hope to serve you again soon.

To you can applicable information for

take advantage of this warranty, you must register it at https://www.grizzly.com/forms/warranty, or

scan the QR code below to be automatically directed to our warranty registration page. Enter all

the product.

WARRANTY

Grizzly G8689Z User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

INTRODUCTION

Contact Info

Manual Accuracy

Identification

Machine Data Sheet

SECTION 1: SAFETY

Safety Instructions for Machinery

Additional Safety for Mill/Drills

SECTION 2: POWER SUPPLY

SECTION 3: SETUP

Needed for Setup

Unpacking

Inventory

Cleanup

Site Considerations

Lifting & Placing

Leveling

Bench Mounting

Test Run

Spindle Break-In

SECTION 4: OPERATIONS

Operation Overview

Positioning Table

Tilting Column

Setting Spindle Speed

SECTION 5: ACCESSORIES

SECTION 6: MAINTENANCE

Schedule

Lubrication

SECTION 7: SERVICE

Troubleshooting

Adjusting Gibs

Replacing Fuse

Tramming Spindle

SECTION 8: WIRING

Wiring Safety Instructions

Wiring Diagram

Electrical Component Photos

SECTION 9: PARTS

Table

Headstock

Column

Labels & Cosmetics

WARRANTY & RETURNS