Grizzly Grinder H7762 User Manual

MODEL H7762

HEAVY DUTY TOOL GRINDER

OWNER'S MANUAL

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

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

#JK7709 PRINTED IN CHINA

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Table of Contents

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

Foreword .................................................................................................................................... 2

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

Machine Data Sheet................................................................................................................... 3

Identification ............................................................................................................................... 4

SECTION 1: SAFETY....................................................................................................................... 5

Safety Instructions for Machinery............................................................................................... 5

SECTION 2: CIRCUIT REQUIREMENTS ........................................................................................ 8

110V Operation.......................................................................................................................... 8

SECTION 3: SET UP........................................................................................................................ 9

Set Up Safety............................................................................................................................. 9

Items Needed for Set Up ........................................................................................................... 9

Unpacking .................................................................................................................................. 9

Inventory................................................................................................................................... 10

Hardware Recognition Chart.................................................................................................... 11

Clean Up .................................................................................................................................. 12

Site Considerations.................................................................................................................. 12

Mounting................................................................................................................................... 13

Grinding Wheels....................................................................................................................... 14

Work Tables............................................................................................................................. 14

SECTION 4: OPERATION.............................................................................................................. 16

Test Run................................................................................................................................... 16

Grinding Tips............................................................................................................................ 17

Operating Grinder .................................................................................................................... 17

Wheel Care .............................................................................................................................. 18

Wheel Dressing........................................................................................................................ 18

Wheel Selection ....................................................................................................................... 19

Wheel Inspection...................................................................................................................... 19

Replacing Wheels .................................................................................................................... 19

SECTION 5: ACCESSORIES......................................................................................................... 21

SECTION 6: MAINTENANCE ........................................................................................................ 22

General..................................................................................................................................... 22

Lubrication................................................................................................................................ 22

Grinding Wheels....................................................................................................................... 22

SECTION 7: SERVICE ................................................................................................................... 23

Troubleshooting........................................................................................................................ 23

Parts Breakdown...................................................................................................................... 24

Parts List .................................................................................................................................. 25

WARRANTY AND RETURNS........................................................................................................ 26

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INTRODUCTION

Foreword

Contact Info

We are proud to offer the Model H7762 Heavy

Duty Tool Grinder. This machine is part of a grow-

ing Grizzly family of fine woodworking machinery.

When used according to the guidelines set forth in

this manual, you can expect years of trouble-free,

enjoyable operation and proof of Grizzly’s com-

mitment to customer satisfaction.

If you have any comments regarding this manual,

please write to us at the address below:

Grizzly Industrial, Inc.

Technical Documentation Manager

P.O. Box 2069

Bellingham, WA 98227-2069

We are pleased to provide this manual with

the Model H7762. It was written to guide you

through assembly, review safety considerations,

and cover general operating procedures. It repre-

sents our effort to produce the best documenta-

tion possible.

We stand behind our machines. If you have any

service questions or parts requests, please call or

write us at the location listed below.

Grizzly Industrial, Inc.

1203 Lycoming Mall Circle

Muncy, PA 17756

Phone: (570) 546-9663

Fax: (800) 438-5901

The specifications, drawings, and photographs

illustrated in this manual represent the Model

H7762 as supplied when the manual was pre-

pared. However, owing to Grizzly’s policy of con-

tinuous improvement, changes may be made at

any time with no obligation on the part of Grizzly.

For your convenience, we always keep current

Grizzly manuals available on our website at www.

grizzly.com. Any updates to your machine will be

reflected in these manuals as soon as they are

complete. Visit our site often to check for the lat-

est updates to this manual!

E-Mail: [email protected]

Web Site: http://www.grizzly.com

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Machine Data Sheet

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Identification

Figure 1. H7762 Identification.

A. Flexible Work Light

B. Grinder Body

C. Water Cup

D. Water Valve

E. Water Pipe

F. Work Table

G. Water Tray

H. Two-Way Power Switch

I. Work Table Lock Handles (rear handles not shown)

J. Work Table Angle Gauge

K. Miter Gauge

L. Grinding Wheel

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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 which are 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.

Indicates an imminently hazardous situation which, if not avoided,

WILL result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,

COULD result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,

MAY result in minor or moderate injury. It may also be used to alert

against unsafe practices.

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

proper operation of the machine.

NOTICE

Safety Instructions for Machinery

1. READ THROUGH THE ENTIRE MANUAL

BEFORE STARTING MACHINERY.

Machinery presents serious injury hazards

to untrained users.

4. ALWAYS USE HEARING PROTECTION

WHEN OPERATING MACHINERY.

Machinery noise can cause permanent

hearing damage.

5. WEAR PROPER APPAREL. DO NOT

wear loose clothing, gloves, neckties, rings,

or jewelry which may get caught in moving

parts. Wear protective hair covering to con-

tain long hair and wear non-slip footwear.

2. ALWAYS USE ANSI APPROVED

SAFETY GLASSES WHEN OPERATING

MACHINERY. Everyday eyeglasses only

have impact resistant lenses, they are

NOT safety glasses.

3. ALWAYS WEAR AN ANSI APPROVED

RESPIRATOR WHEN OPERATING

MACHINERY THAT PRODUCES DUST.

Wood dust is a carcinogen and can cause

cancer and severe respiratory illnesses.

6. NEVER OPERATE MACHINERY WHEN

TIRED, OR UNDER THE INFLUENCE OF

DRUGS OR ALCOHOL. Be mentally alert

at all times when running machinery.

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Safety Instructions for Machinery

7. ONLY ALLOW TRAINED AND PROP-

17. REMOVE ADJUSTING KEYS AND

ERLY SUPERVISED PERSONNEL TO

OPERATE MACHINERY. Make sure

operation instructions are safe and clearly

understood.

WRENCHES. Make a habit of checking for

keys and adjusting wrenches before turn-

ing machinery ON.

18. CHECKFORDAMAGEDPARTSBEFORE

USING MACHINERY. Check for binding

and alignment of parts, broken parts, part

mounting, loose bolts, and any other con-

ditions that may affect machine operation.

Repair or replace damaged parts.

8. KEEP CHILDREN AND VISITORS AWAY.

Keep all children and visitors a safe dis-

tance from the work area.

9. MAKE WORKSHOP CHILD PROOF. Use

padlocks, master switches, and remove

start switch keys.

19. USE RECOMMENDED ACCESSORIES.

Refer to the instruction manual for recom-

mended accessories. The use of improper

accessories may cause risk of injury.

10. NEVER LEAVE WHEN MACHINE IS

RUNNING. Turn power OFF and allow all

moving parts to come to a complete stop

before leaving machine unattended.

20. DO NOT FORCE MACHINERY. Work at

the speed for which the machine or acces-

sory was designed.

11. DO NOT USE IN DANGEROUS

ENVIRONMENTS. DO NOT use machin-

ery in damp, wet locations, or where any

flammable or noxious fumes may exist.

21. SECURE WORKPIECE. Use clamps or

a vise to hold the workpiece when practi-

cal. A secured workpiece protects your

hands and frees both hands to operate the

machine.

12. KEEP WORK AREA CLEAN AND WELL

LIT. Clutter and dark shadows may cause

accidents.

22. DO NOT OVERREACH. Keep proper foot-

ing and balance at all times.

13. USE A GROUNDED EXTENSION CORD

RATEDFORTHEMACHINEAMPERAGE.

Undersized cords overheat and lose power.

Replace extension cords if they become

damaged. DO NOT use extension cords

for 220V machinery.

23. MANY MACHINES WILL EJECT THE

WORKPIECETOWARDTHEOPERATOR.

Know and avoid conditions that cause the

workpiece to "kickback."

24. ALWAYS LOCK MOBILE BASES

(IF USED) BEFORE OPERATING

MACHINERY.

14. ALWAYS DISCONNECT FROM POWER

SOURCE

BEFORE

SERVICING

MACHINERY. Make sure switch is in OFF

position before reconnecting.

25. BE AWARE THAT CERTAIN MATERIALS

MAY CAUSE AN ALLERGIC REACTION

in people and animals, especially when

exposed to fine dust. Make sure you know

what type of dust you will be exposed to

and always wear an approved respirator.

15. MAINTAIN MACHINERY WITH CARE.

Keep blades sharp and clean for best and

safest performance. Follow instructions for

lubricating and changing accessories.

16. MAKE SURE GUARDS ARE IN PLACE

AND WORK CORRECTLY BEFORE

USING MACHINERY.

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Additional Safety Instructions For Grinders

1. EYE PROTECTION. Grinding causes small

particles to become airborne at a high rate

of speed, which can cause serious eye

damage. ALWAYS wear safety glasses

when using this machine.

6. LUNG PROTECTION. Grinding produces

hazardous dust, which may cause long-

term respiratory problems if breathed.

Always wear a NIOSH approved dust mask

or respirator when grinding.

2. MOUNTING TO BENCH/STAND. An unse-

cured grinder may become dangerously

out of control during operation. Make sure

grinder is FIRMLY secured to a bench/

stand before use.

7. WHEEL DIRECTION. Only grind on the

downward side of the wheel. DO NOT grind

on the part of the wheel moving away from

the work table. NEVER grind on the top

part of the wheel.

3. WHEEL SPEED RATING. Wheels oper-

ated at a faster speed than rated for

may break or fly apart. Before mount-

ing a new wheel, be sure the wheel

RPM rating is equal or higher than the

speed of the grinder.

8. SIDE GRINDING. Grinding on the side of

some wheels can cause the them to break

and fly apart. Always check the wheel

specifications before attempting side grind-

ing operations.

9. HAND/WHEEL CONTACT. Grinding

wheels have the capability of removing

a lot of skin fast. Keep a firm grip on the

workpiece and position your hands a safe

distance away when grinding. Avoid wear-

ing gloves as they may get caught in the

grinding wheel and cause serious entan-

glement injuries.

4. WHEEL INSPECTION. Always visually

inspect grinding wheels before use for

cracks, chips, fractures or other damage.

NEVER use a damaged wheel, and replace

any potentially damaged wheels immedi-

ately.

5. STARTING GRINDER. If a wheel IS dam-

aged, it will usually fly apart shortly after

start-up. To protect yourself, always stand

to the side of the grinder when turning it ON

and allow it to gain full speed before stand-

ing in front of it.

10. TABLE POSITION. If the table is too far

away from the wheel, the workpiece may

be pulled down, causing loss of control and

pulling your hand into the grinding wheel.

Keep the table within ¹⁄8" of the wheel when

operating.

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 per-

sonal injury, damage to equipment, or poor

work results.

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 lessen the pos-

sibility of operator injury. If normal safety

precautions are overlooked or ignored, seri-

ous personal injury may occur.

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SECTION 2: CIRCUIT REQUIREMENTS

110V Operation

Electrocution or fire could

result if this machine is

not grounded correctly or

if your electrical configu-

Serious personal injury could occur if you

ration does not comply

connect the machine to the power source

with local and state codes.

before you have completed the set up pro-

Ensure compliance by

cess. DO NOT connect the machine to the

checking with a qualified

power source until instructed to do so.

electrician!

Amperage Draw

The Model H7762 motor draws the following

amps under maximum load:

Motor Draw...........................................6.3 Amps

Circuit Recommendations

We recommend connecting this machine to a

dedicated circuit with a verified ground, using the

circuit breaker size given below. Never replace a

circuit breaker with one of higher amperage with-

out consulting a qualified electrician to ensure

compliance with wiring codes. If you are unsure

about the wiring codes in your area or you

plan to connect your machine to a shared cir-

cuit, you may create a fire hazard—consult a

This machine must have a ground prong in

the plug to help ensure that it is grounded.

DO NOT remove ground prong from plug

to fit into a two-pronged outlet! If the plug

will not fit the outlet, have the proper outlet

installed by a qualified electrician.

qualified electrician to reduce this risk.

Circuit Breaker....................................... 15 Amps

Plug/Receptacle Type

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

Extension Cords

We do not recommend the use of extension

cords. If you find it absolutely necessary:

•

Use at least a 16 gauge cord that does not

exceed 50 feet in length!

The extension cord must also contain a

ground wire and plug pin.

A qualified electrician MUST size cords over

50 feet long to prevent motor damage.

Figure 2. Typical type 5-15 plug and receptacle.

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SECTION 3: SET UP

Set Up Safety

Items Needed for

Set Up

This machine presents

The following items are needed to complete the

set up process, but are not included with your

machine:

serious injury hazards

to untrained users. Read

through this entire manu-

al to become familiar with

the controls and opera-

tions before starting the

machine!

Description

Qty

•

Wrench 13mm............................................ 1

Hex Wrench 6mm ...................................... 1

Assistant (for help with lifting) .................... 1

Unpacking

Wear safety glasses dur-

ing the entire set up pro-

cess!

The Model H7762 was carefully packed when it

left our warehouse. If you discover the machine

is damaged after you have signed for delivery,

please immediately call Customer Service at

(570) 546-9663 for advice.

The Model H7762 is a

heavy machine. DO NOT

over-exert yourself while

unpacking or moving

your machine—get assis-

tance.

Save the containers and all packing materials for

possible inspection by the carrier or its agent.

Otherwise, filing a freight claim can be difficult.

When you are completely satisfied with the con-

dition of your shipment, you should inventory the

contents.

Discard all packing mate-

rials when no longer

required. Packing materi-

als are a choking hazard

to children and animals!

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Inventory

FPO

After all the parts have been upacked, you should

have the following items:

Inventory (Figure 3)

Qty

A. Grinder Body .............................................. 1

B. Shaft End Bushings.................................... 2

C. Work Table Angle Gauges......................... 4

D. Work Table Lock Handles.......................... 4

E. Work Tables ............................................... 2

F. Miter Gauge................................................ 1

G. Grinding Wheels (80 Grit) .......................... 2

H. Water Cup .................................................. 1

I. Water Trays................................................ 2

Hardware and Tools

•

Bolts M8-1.25 x 12 ..................................... 8

Flat Washer 8mm....................................... 4

Flat Washer 10mm..................................... 4

Hex Nut M8-1.25........................................ 4

Lock Washer 10mm ................................... 4

In the event that any nonproprietary parts are

missing (e.g. a nut or a washer), we would be

glad to replace them, or for the sake of expedi-

ency, replacements can be obtained at your local

hardware store.

Figure 3. H7762 Inventory.

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Hardware Recognition Chart

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Clean Up

Site Considerations

The unpainted surfaces are coated with a waxy

oil to protect them from corrosion during ship-

ment. Remove this protective coating with a sol-

vent cleaner or citrus-based degreaser such as

Grizzly’s G7895 Degreaser. To clean thoroughly,

some parts may need to be removed. For opti-

mum performance from your machine, make

sure you clean all moving parts or sliding

contact surfaces that are coated. Avoid chlo-

rine-based solvents, such as acetone or brake

parts cleaner, as they may damage painted sur-

faces should they come in contact. Always follow

the manufacturer’s instructions when using any

type of cleaning product.

Workbench Load

Refer to the Machine Data Sheet for the weight

and footprint specifications of your machine.

Some workbenches may require additional rein-

forcement to support the machine.

Working Clearances

Working clearances can be thought of as the

distances between machines and obstacles that

allow safe operation of every machine with-

out limitation. Consider existing and anticipated

machine needs, size of material to be processed

through each machine, and space for auxiliary

stands or work tables. Also consider the relative

position of each machine to one another for effi-

cient material handling.

Gasoline and petroleum

products have low flash

points and could cause

an explosion or fire if

used to clean machinery.

DO NOT use gasoline or

petroleum products to

clean the machinery.

Lighting and Outlets

Lighting should be bright enough to eliminate

shadow and prevent eye strain. Electrical circuits

should be dedicated or large enough to handle

the amperage draw. Outlets should be located

near each machine so power or extension cords

are clear of high-traffic areas. Observe local elec-

trical codes for proper installation of new lighting,

outlets, or circuits.

Many of the solvents

commonly used to clean

machinery can be toxic

when inhaled or ingest-

ed. Lack of ventilation

while using these sol-

vents could cause seri-

ous personal health risks

or fire. Take precautions

from this hazard by only

using cleaning solvents

in a well ventilated area.

Unsupervised children and

visitors inside your shop

could cause serious per-

sonal injury to themselves.

Lock all entrances to the

shop when you are away and

DO NOT allow unsupervised

children or visitors in your

shop at any time!

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Mount the grinder as shown below:

Mounting

H7762

Base

Bolt

The Model H7762 weighs 92.5 lbs. Make sure

the workbench on which you plan to mount the

grinder is sturdy enough to hold the weight of the

machine and any downward pressure that may be

applied during operation. The workbench should

have a level surface and be heavy, or attached to

the floor so that it will not move or vibrate during

operation.

Workbench

Flat

Washer

Components and Hardware Required

Qty

Lock

Grinder Unit....................................................... 1

Hex Bolt M8-1.25 (length varies)....................... 4

Flat Washer 8mm.............................................. 8

Lock Washer 8mm ............................................ 4

Hex Nut M8-1.25 ............................................... 4

Washer

Hex Nut

Figure 4. Mounting machine to the workbench.

Note: Because sizes vary for each individual situ-

ation, the hardware in this step is not included

with the Model H7762.

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5. Push the rubber shaft end bushing back onto

Grinding Wheels

the end of the arbor.

6. Repeat Steps 1-6 for the second grinding

The Model H7762 features two Type 50 plate-

mounted grinding wheels that must be attached

to the grinder body before any operation of the

machine.

wheel.

Work Tables

Components and Hardware Required

Qty

Grinder Unit....................................................... 1

Type 50 Plate-Mounted Grinding Wheels ......... 2

Hex Bolts M6-1 x 25.......................................... 8

The Model H7762 also features two work tables

that must be installed before any work can com-

mence.

To install the grinding wheels:

Components and Hardware Required

Qty

1. Remove the rubber shaft end bushing from

Grinder Unit....................................................... 1

Work Table Angle Gauges................................ 4

Lock Handles M10-1.25 x 23 ............................ 4

Flat Washers 10mm .......................................... 4

Lock Washers 10mm......................................... 4

Work Tables ...................................................... 2

Flat Washers 8mm ............................................ 4

Hex Nuts M8-1.25 ............................................. 4

the end of the arbor.

2. Carefully slide the grinding wheel onto the

arbor. Be sure not to bump or scratch the

wheel as it may dent, crack or otherwise

damage the wheel.

3. Align the large holes in the grinding wheel

with the large screw holes in the connection

plate of the grinder.

To install the work tables:

1. Attach an angle gauges to the grinder body

wih a 10mm washer, 10mm lock washer and

lock handle as shown in Figure 6.

4. Tightly fasten the wheel to the connector

plate using the four hex bolts. In order to

properly balance the wheel, tighten the bolts

in the order shown in Figure 5.

Grinding

Wheel

4th

Bolt

2nd

Bolt

Arbor

1st

Bolt

3rd

Bolt

Figure 6. Attaching angle gauge.

Figure 5. Wheel bolt mounting order.

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2. Align the angle gauge so that the pointer at

6. Align the work table so the gap between the

the bottom of the gauge is pointing at 0º.

table and the grinding wheel is approximately

/8".

3. Tighten the lock handle further so that the

angle gauge does not move.

7. Fasten the table to the support dials using an

8mm flat washer and a hex nut on each bolt,

as shown in Figure 7.

4. Repeat Steps 1-3 for the other three angle

gauges.

Note: The fastening process can affect the

gap between the work table and the grinding

wheel. Always recheck the gap width after

fastening and adjust as necessary.

5. Place a work table on a pair of angle gauges-

so that the bolts on the underside of the table

fit through the slots in the angle gauges.

8. Repeat Steps 5-7 for the other work table.

Hex

Nut

Flat

Washer

Angle

Gauge

Figure 7. Work table attachment.

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SECTION 4: OPERATION

Test Run

Keep loose clothing

rolled up and out of the

way of machinery and

keep hair pulled back.

Once mounting and adjustments are complete as

described in the previous section, you are ready

to test the machine.

This grinder has a two-way switch. When switched

to the "up" position (the top arrow on the switch),

the grinder wheels will rotate upward and away

from the front of the machine. When switched

to the "down" position (the bottom arrow on the

switch), the grinder wheels will rotate downward

and towards the front of the machine. Both posi-

tions are considered the ON position. The central

switch position (the circle on the switch) is the

OFF position.

Disconnect power from

the machine when per-

forminganymaintenance,

assembly or adjustments.

Failure to do this may

result in serious personal

injury.

To test run the grinder:

Using this machine pro-

duces dust which may

cause eye injuries or

respiratory problems.

Protect yourself by

wearing safety glasses

and a respirator dur-

ing the entire operation

process. DO NOT wear

gloves while operating

this machine as they can

be caught in the rotating

surfaces and become

entangled. Failure to

comply with this warn-

ing may result in serious

personal injury.

1. Plug the machine into the power source.

2. Stand to the side of the grinder wheel and

turn the grinder ON.

The machine should run smoothly with little

or no vibration or rubbing noises. Strange or

unusual noises should be investigated and cor-

rected before operating the machine further. If

the machine seems okay, stay out of the line of

rotation of either grinding wheel and let it run for

one to two minutes to make sure both wheels are

structurally sound.

If you cannot easily locate the source of an

unusual noise or vibration, feel free to contact our

Technical Support department for help.

All grinding wheels have the potential of

breaking apart during operation, causing

serious personal injury or death! Always

stand to the side of the grinder when turn-

ing it ON and wear the proper safety equip-

ment to protect yourself.

NOTICE

This section provides only a basic descrip-

tion of grinder applications. There are many

different grinding wheels available for your

grinder. WE STRONGLY RECOMMEND that

you read books, trade magazines, or get for-

mal training to maximize the potential of your

machine.

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Grinding Tips

Operating Grinder

The grinder is a safe tool when used properly. In

addition to the safety instructions in this manual,

the most important safety consideration is to use

common sense at all times. What may be okay in

one situation, may not be safe in another.

The grinder is designed for use with ferrous met-

als only. Grinding non-ferrous metals and wood

products will quickly load the grinding wheel sur-

face with particulate matter and ruin its abrasive

qualities. It can also cause the wheel to overheat

and possibly explode. Always grind on the sur-

faces shown in Figure 8.

Read and understand the following state-

ments to protect yourself before grinding:

•

Make sure all guards are in place.

Stand to the side of the grinder when you turn

it ON and allow it to run for one full minute

before beginning any grinding procedure.

Grinding Surfaces

•

Make sure there are no loose mounting bolts

and that you have performed the “Test Run”

instructions in this manual.

Remember that grinding often produces

sparks. DO NOT allow anyone to stand in the

path of the sparks. DO NOT grind near poten-

tially flammable materials, such as flammable

liquids or gases, paper or cloth.

Mounting Plate

Figure 8. Type 50 grinding wheel surfaces.

•

Wear the proper protective clothing.

Remember that particles flying off of a grind-

ing wheel will be traveling very fast—prepare

for this. Wear a face shield, a dust mask and

a leather apron.

To grind with the grinding wheel:

1. Fill the water cup ³/4 full with water.

2. With the machine plugged into power, stand

to the side of the grinding wheel, and turn the

grinder ON.

•

DO NOT lean into the workpiece in a manner

that may cause your hands to move into the

spinning wheel if the workpiece slips off.

3. Allow the machine to run for one full minute to

ensure that the grinding wheels are safe for

use, then move to the front of the machine.

Concentrate on the task at hand. STOP

grinding if there are distractions.

4. Grasp the workpiece tightly and properly sup-

port it on the work table.

After you have switched OFF the grinder,

DO NOT continue grinding and DO NOT

manually stop the grinding wheel with your

workpiece!

5. Place the workpiece against the surface of

the wheel with moderate pressure, moving it

back and forth in a steady, even motion.

Note: Using too much pressure will slow the

motor, may damage the wheel, and will over-

heat the workpiece. Using too little pressure

will prevent sufficient contact with the wheel.

-17-

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6. Depending on the type of metal, you may need

to regularly dip the workpiece into the water

cup to cool it off. For heat-intensive work,

direct a stream of water onto the workpiece

and grinding wheel with the flexible water

pipe. The flow of water can be increased or

decreased using the red valve just below the

water cup. If the water supply is exhausted,

stop grinding and refill the water cup.

Wheel Dressing

Dressing restores the grinding wheel with a like-

new abrasive quality. Whenever the front surface

of the wheel loses its abrasive qualities or balance

due to particle loading or polishing of the wheel

surface, then the wheel should be dressed. Use

a commercially-available dressing tool, such as

those available on Page 21.

Wheel Care

To dress the grinding wheel:

1. With the machine plugged into power, stand

to the side of the grinding wheel and move

the switch to the ON position.

A large part of your safety while grinding depends

on the condition of the grinding wheel. A wheel in

poor condition may break apart during rotation,

causing serious injury.

2. Allow the machine to run for at least one full

minute to make sure that the grinding wheel

is safe to use, then move to the front of the

machine.

To properly care for your wheel, follow these

tips:

•

Always transport, store and handle wheels

with care. Wheels may be damaged if

dropped or if heavy objects are stacked on

them.

3. Hold the dressing tool firmly on the tool rest

with both hands and press it lightly against

the front surface of the grinding wheel.

4. Move the dressing tool in a side-to-side

motion, while keeping it even with the surface

of the grinding wheel.

•

Select the right grinding wheel for both the

job and the machine. DO NOT grind material

that is not designed for the wheel. A machine

that rotates at a higher RPM than the wheel

is rated for may cause the wheel to fly apart.

5. Regularly pull the dressing tool away from the

wheel for visual inspection and repeat Steps

3 & 4 until the surface of the wheel appears

to be restored to its normal color and bal-

ance.

•

Mount the wheels properly. (See the

"Replacing Wheels" instructions on Page 19

for guidance.) Never use a wheel with the

wrong arbor size for the grinder.

DO NOT abuse the wheel by jamming the

workpiece into the grinding wheel with exces-

sive force. This can cause irreparable dam-

age to the wheel.

Learn how to use the grinder and the grinding

wheels properly. Ask a trusted person with

experience or consult with your local library

to learn more.

Dress the grinding wheel when the surface

loses its abrasive quality or becomes unbal-

anced.

-18-

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Wheel Selection

Wheel Inspection

The Model H7762 only accepts Type 50 wheels

with a 1¹⁄4" bore.

Before mounting a new grinding wheel, it must

be inspected. DO NOT assume that a wheel is

in sound condition just because it is new—often,

damage can occur during shipping, with age, or

with exposure to moisture.

Aluminum oxide and silicon carbide wheels are

marked in a somewhat uniform manner by all

major manufacturers. Understanding these mark-

ings will help you understand the capabilities of

various wheels. Always refer to the manufactur-

er’s grinding recommendations when selecting a

wheel for your project.

The most effective way to check for damage is to

give the wheel a Visual Inspection. Look for any

cracks, chips, nicks, or dents in the surface of the

wheel. If you see any of these, however minor,

DO NOT use the wheel. Ideally a new grinding

wheel will be in almost flawless condition.

The basic format for wheel numbering is:

Abrasive Grit Grade

Bond

Type

Prefix

Type

Size

Type

Replacing Wheels

Type 1

The Prefix is the manufacturer’s designation for a

particular type.

The hazards of using a damaged wheel

include flying chunks of sharp abrasive

material that could cause serious injury or

death. Inspect every grinding wheel before

it is mounted and DO NOT use a damaged

grinding wheel!

The most common Abrasive Types used are A for

Aluminum Oxide and C for Silicon Carbide, and

occasionally SG for Seeded Gel.

The Grit Size is a number that refers to the size

of the abrasive grain in the wheel. The lower the

number, the coarser the wheel. Grit sizes range

from 10, which is a very coarse grit used for

roughing, to 220, which is usually the upper range

for fine finish work.

The wheel guard assembly must be removed in

order to mount or dismount a grinding wheel.

To remove/mount a wheel:

Grade is an indication of the hardness of the

wheel—“A” being the softest and “Z” being the

hardest.

1. DISCONNECT MACHINE FROM THE

POWER SUPPLY!

Bond Type refers to the type of bonding material

used to hold the abrasive material. Most general

purpose wheels will have a “V” indicating Vitrified

Clay is used. Vitrified Clay provides high strength

and good porosity. The other common bond type

is “B” for resin where synthetic resins are used.

These are used to grind cemented carbide and

ceramic materials.

2. Remove the work table by unscrewing the

two hex nuts on the underside of the table.

3. Unscrew the four bolts that fasten the grind-

ing wheel to the connector plate.

4. Carefully slide the grinding wheel free from

the arbor.

There may be other numbers inserted that have

meaning for a particular type of wheel. Refer to

the manufacturer’s technical data for a complete

explanation.

-19-

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5. Slide the new grinding wheel onto the arbor.

Be sure not to bump or scratch the wheel as

it may dent, crack or otherwise damage the

wheel.

4th

Bolt

Grinding

Wheel

Arbor

2nd

Bolt

6. Align the large holes in the grinding wheel

with the screw holes in the connection plate

of the grinder.

7. Fasten the wheel to the connector plate with

the four bolts. In order to properly balance the

wheel, tighten the bolts in the order shown in

Figure 9.

1st

3rd

Bolt

8. Run a new wheel for at least one minute while

standing clear of the line of rotation. If a wheel

does have defects it will generally fail as soon

as it gets up to full speed.

Figure 9. Wheel bolt mounting order.

-20-

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ACCESSORIES

SECTION 5: ACCESSORIES

H5944—#0 Wheel Dresser

H5945—#1 Wheel Dresser

H5946—#2 Wheel Dresser

These wheel dressers expose new grains for

aggressive cutting on all types of grinding wheels.

The star wheels and discs are hardened steel,

and the cast iron handle provides stabilizing

mass for better control. Available in three sizes:

#0, #1 and #2.

G7984—Face Shield

H1298—Dust Sealed Safety Glasses

H1300—UV Blocking, Clear Safety Glasses

H2347—Uvex® Spitfire Safety Glasses

H0736—Shop Fox® Safety Glasses

Safety Glasses are essential to every shop. If

you already have a pair, buy extras for visitors

or employees. You can't be too careful when it

comes to shop safety!

H5946

H1300

H1298

G7984

H5944

H5945

H0736

H2347

Figure 12. Our range of Wheel Dressers.

Figure 10. Our most popular safety glasses.

H5891 1/4 Carat Diamond Dresser

H5892 3/4 Carat Diamond Dresser

These 8¹⁄4" long round-body dressers feature

industrial diamond tips and a knurled grip for

maximum control. Includes protective rubber end

cap. Available in two carat sizes.

H5892

H5891

Figure 11. Our range of Diamond Dressers.

-21-

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SECTION 6: MAINTENANCE

Grinding Wheels

Disconnect power to the

machine when perform-

ing any maintenance,

assembly or adjust-

ments. Failure to do this

may result in serious

personal injury.

The grinding wheel should be visually inspected

before every use. Take care in storing grinding

wheels to keep them free from potential dam-

age due to being dropped or having other items

dropped on them. Store all grinding wheels in a

dry location. Type 50 grinding wheels should be

stored vertically with cushioning material between

each wheel.

General

If a grinding wheel diameter has been reduced

to 5", the wheel must be replaced. Operating a

wheel at anything less than this diameter can lead

to wheel explosion and serious personal injury.

Always be aware of the condition of your machine.

Routinely check the condition of the following

items and repair or replace as necessary:

Grinding wheels will require periodic dressing.

Refer to the “Wheel Dressing” instructions on

Page 19 for details on how this is done.

•

Damaged or loose grinding wheels.

Loose mounting bolts.

Worn switch.

Worn or damaged cord.

Worn or damaged support bearings.

Any other condition that could hamper the

safe operation of this machine.

Lubrication

Sealed and pre-lubricated ball bearings require

no lubrication for the life of the bearings. All bear-

ings are standard sizes, and replacements can be

purchased from our Parts Department or a bear-

ing supply store.

-22-

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SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix your machine if a problem develops. If you

need replacement parts or you are unsure of your repair skills, then feel free to call our Technical Support

department at (570) 546-9663.

Troubleshooting

SYMPTOM

POSSIBLE CAUSE

CORRECTIVE ACTION

Motor will not start.

1. Low voltage.

1. Check power line voltage and correct if necessary.

2. Open circuit in motor or loose connec- 2. Inspect all lead connections on motor for loose or

tions. open connections.

Motor will not start; 1. Loose connections or short circuit in 1. Inspect cord, plug and motor for damaged insulation,

fuses or circuit breakers

blow.

line cord, plug or motor.

shorted wires or loose connections.

2. Incorrect fuses or circuit breakers in 2. Install correct fuses or circuit breakers.

power line.

Motor overheats.

1. Motor overloaded.

1. Reduce load on motor.

Motor stalls (resulting in 1. Motor overloaded.

1. Reduce load on motor.

blown fuses or tripped

circuit).

2. Short circuit in motor or loose connec- 2. Inspect connections on motor for loose or shorted

tions.

terminals or worn insulation.

3. Low voltage.

3. Check power line voltage and correct if necessary.

4. Incorrect fuses or circuit breakers in 4. Install correct fuses or circuit breakers.

power line.

Machine slows when 1. Workpiece pressure is too great.

operating.

1. Reduce workpiece pressure on wheel.

Machine vibrates when 1. Grinding wheel is unbalanced.

1. Adjust or tighten wheel mounting bolts as necessary.

operating.

2. Grinding wheel is cracked or damaged. 1. Replace the wheel.

3. Arbor is bent.

3. Inspect and replace the arbor if necessary.

4. Inspect and replace the bearings if necessary.

5. Tighten the mounting bolts.

4. Bearings are worn or damaged.

5. Mounting bolts are loose.

Wavy condition on sur- 1. Machine vibrating.

1. Ensure machine is securely mounted.

2. Use a holding device to firmly retain the workpiece.

3. Dress the grinding wheel.

face of workpiece.

2. Workpiece not being held firmly.

3. Wheel face uneven.

4. Wheel is too hard.

4. Use softer wheel, or reduce the feed rate.

Lines on surface of 1. Impurity on wheel surface.

workpiece.

1. Dress the grinding wheel.

2. Workpiece not being held tightly.

Burning spots or cracks 1. Workpiece pressure is too great.

2. Use a holding device to firmly retain the workpiece.

1. Reduce workpiece pressure on wheel.

2. Cool the workpiece more frequently.

in the workpiece.

2. Coolant required.

3. Improper type of grinding wheel.

3. Try a wheel which is softer style or a coarser grit.

Wheel dulls quickly, grit 1. Workpiece pressure is too great.

1. Reduce workpiece pressure on wheel.

2. Select a wheel with a harder bond.

3. Replace the wheel.

falls off.

2. Wheel is too soft.

3. Wheel diameter too small.

4. Bad wheel dress.

4. Dress the wheel.

5. Defective wheel bonding.

5. Consult manufacturer of grinding wheel.

Wheel

workpiece shows burn

marks.

clogs

and 1. Wheel is too hard.

1. Select a wheel with a softer bond.

2. Increase rate of movement of workpiece onto wheel.

3. Dress the wheel.

2. Feed rate too slow.

3. Bad wheel dress.

4. Coolant required.

4. Cool the workpiece more frequently.

-23-

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Parts Breakdown

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Parts List

REF

PART #

DESCRIPTION

REF

PART #

DESCRIPTION

PH7762001

PN15M

SHAFT END BUSHING

HEX NUT M18-1.5

PH7762036

PH7762037

PH7762038

PH7762039

PH7762040

PLW04M

CORD BUSHING

MOTOR BASE

PH7762003

H8873

SPECIAL SCREW M8-1.25 X 12

GRINDING WHEEL

CORD CLIP FIXING PLATE

CORD CLIP

PH7762005

PH7762006

PB10M

CONNECTION PLATE

RUBBER WASHER

LAMP

LOCK WASHER 8MM

HEX BOLT M8-1.25 X 20

INTERNAL TOOTH WASHER 4MM

PHLP HD SCR M4-.7 X 10

BOTTOM COVER

HEX BOLT M6-1 X 25

PHLP HD SCR M5-.8 X 10

FLAT WASHER 5MM

LEFT-HAND POINTER

DIAL SET PIN

PB09M

PS09M

PTLW11M

PS38M

PW02M

PH7762010

PH7762011

PH7762012

PH7762013

PN03M

PH7762045

PN06M

HEX NUT M5-.8

WHEEL COVER

PH7762047

PH7762048

PH7762049

PH7762050

PH7762051

PH7762052

PH7762053

PH7762054

PH7762055

PH7762056

PH7762057

PH7762058

PH7762059

PH7762060

PH7762061

PH7762062

PH7762063

PB104M

CAPACITOR FIXING RING

CAPACITOR 50M 300VAC 3.75" X 2"

SWITCH FIXING PLATE

SWITCH

WATER CUP SET PIN

HEX NUT M8-1.25

PW01M

FLAT WASHER 8MM

ANGLE GAUGE

PH7762016

PW04M

SPECIAL WAVE WASHER 35MM

MITER FIXING BRACKET

STRAIGHT PIN

FLAT WASHER 10MM

LOCK WASHER 10MM

HANDLE PIN BUSHING

LOCK HANDLE M10-1.5 X 23

LOCK HANDLE ARM

WATER TRAY

PLW06M

PH7762019

PH7762020

PH7762021

PH7762022

PH7762023

PH7762024

PH7762025

PH7762026

PH7762027

PS47M

MITER GAUGE

INDICATOR PIN

LOCKING BOLT M5-.8 X 13

WING NUT M5-.8

SUPT SCREW M8-1.25 X 18

WATER TRAY POSITIONING PIN

WORK SUPPORT

NAMEPLATE RIVET 2.5 X 4

SCALE PLATE

WATER CUP

RIGHT-HAND POINTER

ADJUSTING BUSHING

PHLP HD SCR M6-1 X 25

LOCK WASHER 6MM

LEFT MOTOR END CAP

BEARING 6204

VALVE

WATER PIPE

RIGHT MOTOR END CAP

HEX BOLT M5-.8 X 30

LOCK WASHER 5MM

LOCK WASHER 4MM

HEX NUT M12-1

PLW03M

PH7762030

P6204

PLW01M

PLW02M

PH7762032

PH7762033

PH7762034

PH7762035

BEARING FIXING RING

SPRING TYPE STRAIGHT PIN

ROTOR

PN22M

PW06M

FLAT WASHER 12MM

CORD & PLUG

PH7762069

PH7762070

STATOR

MACHINE ID LABEL

Safety labels warn about machine hazards and ways to prevent injury. The owner of this machine

MUST maintain the original location and readability of the labels on the machine. If any label is

removed or becomes unreadable, REPLACE that label before using the machine again. Contact

Grizzly at (800) 523-4777 or www.grizzly.com to order new labels.

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WARRANTY AND 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 par-

ticular 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.

To take advantage of 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.

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.

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.

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