Grizzly Grinder H7758 User Manual

MODEL H7758/H7759

8" & 10" Grinders

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.

#TR7764 PRINTED IN CHINA

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Table of Contents

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

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

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

H7758 Machine Data Sheet....................................................................................................... 3

H7759 Machine Data Sheet....................................................................................................... 4

Identification ............................................................................................................................... 5

SECTION 1: SAFETY....................................................................................................................... 6

Safety Instructions for Machinery............................................................................................... 6

SECTION 2: CIRCUIT REQUIREMENTS ........................................................................................ 9

110V Operation.......................................................................................................................... 9

SECTION 3: SET UP...................................................................................................................... 10

Set Up Safety........................................................................................................................... 10

Items Needed for Set Up ......................................................................................................... 10

Unpacking ................................................................................................................................ 10

Inventory & Assembly .............................................................................................................. 11

SECTION 4: OPERATIONS ........................................................................................................... 13

Operation Safety ...................................................................................................................... 13

Wheel Care .............................................................................................................................. 14

Wheel Selection ....................................................................................................................... 14

Wheel Inspection...................................................................................................................... 15

Wheel Replacement................................................................................................................. 15

Accessories.............................................................................................................................. 16

SECTION 5: SERVICE ................................................................................................................... 17

Troubleshooting........................................................................................................................ 17

H7758 Parts Breakdown .......................................................................................................... 18

H7758 Parts List....................................................................................................................... 19

H7759 Parts Breakdown .......................................................................................................... 20

H7759 Parts List....................................................................................................................... 21

WARRANTY AND RETURNS........................................................................................................ 22

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INTRODUCTION

Foreword

Contact Info

If you have any comments regarding this manual,

please write to us at the address below:

We are proud to offer the Model H7758/H7759 8"

& 10" Bench Grinders. These machines are part

of a growing Grizzly family of fine woodworking

machinery. When used according to the guide-

lines set forth in this manual, you can expect

years of trouble-free, enjoyable operation and

proof of Grizzly’s commitment to customer satis-

faction.

Grizzly Industrial, Inc.

Technical Documentation Manager

P.O. Box 2069

Bellingham, WA 98227-2069

Email: [email protected]

We stand behind our machines. If you have any

service questions or parts requests, please call or

write us at the location listed below.

We are pleased to provide this manual with the

Model H7758/H7759. It was written to guide you

through assembly, review safety considerations,

and cover general operating procedures.

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

H7758/H7759 as supplied when the manual was

prepared. 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.

E-Mail: [email protected]

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

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H7758 Machine Data Sheet

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H7759 Machine Data Sheet

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Identification

A. Eye Shield (to be used WITH safety glasses)

B. Grinding Wheel

C. Tool Rest

D. ON/OFF Switch

E. Wheel Safety Guard

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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.

6. NEVER OPERATE MACHINERY WHEN

TIRED, OR UNDER THE INFLUENCE OF

DRUGS OR ALCOHOL. Be mentally alert

at all times when running machinery.

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.

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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. CHECK FOR DAMAGED PARTS

BEFORE USING MACHINERY. Check

for binding and alignment of parts, broken

parts, part mounting, loose bolts, and any

other conditions 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-

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.

ing and balance at all times.

23. MANY MACHINES WILL EJECT THE

WORKPIECETOWARDTHEOPERATOR.

Know and avoid conditions that cause the

workpiece to "kickback."

14. ALWAYS DISCONNECT FROM POWER

24. ALWAYS LOCK MOBILE BASES

(IF USED) BEFORE OPERATING

MACHINERY.

SOURCE

BEFORE

SERVICING

MACHINERY. Make sure switch is in OFF

position before reconnecting.

25. BE AWARE THAT CERTAIN DUST MAY

BE HAZARDOUS to the respiratory sys-

tems of people and animals, especially

fine dust. Make sure you know the hazards

associated with the type of dust you will be

exposed to and always wear a respirator

approved for that type of dust.

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 ejects small

particles at a high rate of speed. ALWAYS

wear safety glasses when using this

machine.

7. LUNG PROTECTION. Grinding produces

hazardous dust, which may cause long-

term respiratory problems. 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.

8. SIDE GRINDING. Grinding on the side of

wheels can cause the them to break and

fly apart—unless the wheel is rated for side

grinding.

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.

9. TOP GRINDING. Grinding on the top

of wheels greatly increases the risk of

workpiece kickback. Always grind on the

downward part of the wheel.

10. HAND/WHEEL CONTACT. Grinding

wheels can remove a lot of skin fast. Keep

a firm grip on the workpiece and position

your hands a safe distance away when

grinding. Avoid wearing gloves as they

may get caught in the grinding wheel and

cause even more serious entanglement

injuries.

4. WHEEL FLANGES. Only use the flanges

included with the grinder when mounting

wheels. Other flanges may not properly

secure the wheel and cause an accident.

5. RING TEST. Perform a "ring test" on grind-

ing wheels before installation to ensure

that they are safe to use. A wheel that does

not pass the ring test may break or fly apart

during operation.

11. TOOL REST POSITION. If the tool rest is

too far away from the wheel, the workpiece

may be pulled down, causing loss of con-

trol and pulling your hand into the grinding

wheel. Keep the tool rest within ¹⁄8" from the

wheel when operating.

6. 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

standing in front of it.

12. CRACKED WHEEL. Cracked wheels

may break and fly apart during operation.

Replace cracked wheels immediately!

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

Model H7758...........................................5 Amps

Model H7759......................................10.5 Amps

Circuit Requirements

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

qualified electrician to reduce this risk.

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.

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 14 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.

Typical type 5-15 plug and receptacle.

Figure .

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SECTION 3: SET UP

Set Up Safety

Items Needed for

Set Up

The following items are needed to complete the

set up process, but are not included with your

machine:

This machine presents

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 or Socket 12mm............................ 1

Wrench or Socket 10mm............................ 1

Wrench or Socket 8mm.............................. 1

Wrench or Socket 7mm.............................. 1

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

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

Wear safety glasses dur-

ing the entire set up pro-

cess!

Unpacking

The Model H7758/H7759 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 H7758/H7759

is a heavy machine. DO

NOT over-exert yourself

while unpacking or mov-

ing your machine—get

assistance.

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.

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Inventory &

Assembly

EYE SHIELDS are the first level of protec-

tion from flying debris or sparks and MUST

be installed before operating the grinder.

Use the list below and Figures 1 & 2 to inventory

and assemble your grinder.

H7759 Box Inventory

Qty

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

B. Eye Shields (DO NOT OVERTIGHTEN).... 2

C. Support Arms ............................................. 2

D. Support Retainers ...................................... 2

E. Eyeshield Bracket Assemblies................... 2

F. Tool Rests .................................................. 2

G. Hex Bolts M8-1.25 X 14............................. 2

H. Star Knobs M6-1 x 10 ................................ 2

I. Flat Washers 8mm..................................... 2

J. *Spark Deflectors ....................................... 2

K. Phillips Head Screws M4-.7 X 10............... 4

L. Flat Washers 4mm..................................... 4

M. Lock Washers 4mm ................................... 4

N. Hex Nuts M4-.7 .......................................... 4

H7758 Box Inventory

Qty

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

B. Eye Shields (DO NOT OVERTIGHTEN).... 2

C. Support Arms ............................................. 2

D. Support Retainers ...................................... 2

E. Eyeshield Bracket Assemblies................... 2

F. Tool Rests .................................................. 2

G. Hex Bolts M8-1.25 X 14............................. 2

H. Hex Bolts M8-1.25 X 10............................. 2

I. Hex Bolts M6-1 X 6.................................... 2

J. Flat Washers 8mm..................................... 6

K. Flat Washers 6mm..................................... 2

L. Spark Deflectors......................................... 2

M. Phillips Head Screws M4-.7 X 10............... 4

N. Flat Washers 4mm..................................... 4

O. Lock Washers 4mm ................................... 4

P. Hex Nuts M4-.7 .......................................... 4

* The Spark Deflectors (J) attach with the screw,

hex nut, and washer that holds the wheel cover

in place.

M, N, O, P

K, L, M, N

I, K

G, J

G, I

H, J

Figure 2. H7759 assembly.

Figure 1. H7758 assembly.

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.

NOTICE

Some hardware/fasteners in the inventory

list may arrive pre-installed on the machine.

Check these locations before assuming any

items from the inventory list are missing.

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Mounting

Test Run

Mount the grinder on a workbench or stand (see

Page 16) that is sturdy enough to hold the weight

of the machine and any downward pressure that

may be applied during operation.

The test run ensures that the grinder and wheels

did not get damaged during shipping.

To test run the grinder:

The workbench should have a level surface and

be heavy, or attached to the floor, so it will not

move during operation.

1. Review and understand the grinder safety

information on Page 6.

2. Plug the grinder into the power source.

The grinder can be mounted by drilling a holes in

your workbench and securing the grinder with hex

bolts, washers, and hex nuts. Or, you can secure

it directly into the workbench with lag screws and

flat washers. (Mounting hardware is not provided

due to the many possible set ups and workbench

thicknesses.)

3. Stand away from the line of rotation of the

wheel, turn the grinder ON, and allow it to run

for one minute.

—The grinder should run smoothly.

—If there is an obvious problem with the way

the grinder is running, turn it OFF immedi-

ately and troubleshoot the problem, using

the troubleshooting table on Page 17. DO

NOT operate the grinder until it is fixed.

When locating your grinder, remember:

•

You'll need room for potentially large

workpieces.

Grinding spreads dust in the immediate vicin-

ity of the grinder.

Grinding creates flying sparks that MUST be

out of reach of any flammables.

You'll need a lot of light around the grinding

wheel.

-12-

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SECTION 4: OPERATIONS

Operation Safety

Grinding Tips

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.

Damage to your eyes, lungs, and ears could

result from using this machine without

proper protective gear. Always wear safety

glasses, a respirator, and hearing protection

when operating this machine.

Here are some tips to keep in mind while

grinding:

•

Make sure all guards are in place.

Remember that grinding often produces

sparks. DO NOT allow anyone to stand in

the path of the sparks. DO NOT grind near

flammable materials.

•

Maintain proper care of your wheels. Read

the Wheel Care instructions for ideas on how

to do this.

Loose hair and cloth-

ing could get caught in

machinery and cause seri-

ous personal injury. Keep

loose clothing and long

hair away from moving

machinery.

Wear the proper protective clothing. Particles

flying off of a grinding wheel will be travel-

ing very fast—prepare for this. Wear safety

glasses/face shield, a dust mask, earplugs,

a leather apron, and heavy leather boots.

NOTICE

•

Grasp the workpiece firmly and properly

support it on the tool rest during grinding.

Maintain even pressure and control of the

workpiece when grinding.

If you have never used this type of machine

or equipment before, WE STRONGLY REC-

OMMEND that you read books, trade maga-

zines, or get formal training before begin-

ning any projects. Regardless of the con-

tent in this section, Grizzly Industrial will

not be held liable for accidents caused by

lack of training.

•

Concentrate on the task at hand. STOP

grinding if other people are distracting you or

your mind is on something else.

DO NOT grind on the side of the wheel.

The wheels provided with the Model H7758/

H7759 are not designed for side grinding.

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Wheel Care

Wheel Selection

Your safety when grinding depends, on a large

part, on the condition of the wheel during grind-

ing. A wheel in poor condition presents the pos-

sibility of breaking apart during rotation and injur-

ing the operator and possibly causing property

damage.

The Model H7758 only accepts Type 1 wheels

with a ⁄8" bore. The Model H7759 only accepts

Type 1 wheels with a 1¹⁄4" bore.

Aluminum oxide and silicon carbide wheels are

marked in a somewhat uniform manner by all the

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.

Here are some tips to help you avoid breaking

the wheel:

•

Always transport, store and handle wheels

with care. Wheels may be damaged if they

are dropped or if heavy objects are stacked

on them.

The basic format for wheel numbering is:

Abrasive

Type

Bond

Type

Prefix

Grit Size Grade

•

Select the right grinding wheel for the job.

DO NOT grind material inappropriate for the

wheel type.

Select the right wheel for the machine. A

machine that rotates at a higher RPM than

the wheel is rated for may cause the wheel

to fly apart.

The Prefix is the manufacturer’s designation for a

particular wheel type (eg, Type 1 wheels).

The most common Abrasive Types used are A

for Aluminum Oxide, C for Silicon Carbide, and

occasionally SG for Seeded Gel.

•

Mount the wheels properly. (See the Wheel

Replacement instructions on Page 15 for

guidance.) Never use a wheel with the wrong

arbor size for the grinder.

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. Ten is a very

coarse wheel for roughing and 220 is usually the

upper range for fine finish work.

•

Do not abuse the wheel by jamming the work

into the grinding wheel with excessive force.

Learn how to use the grinder and the grind-

ing wheels properly. Ask a trusted person

with experience or consult with your local

library to learn more.

Grade is an indication of the hardness of the

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

hardest.

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.

•

Always spin water/coolant out of the wheel

before turning the grinder OFF. This may

take 5–10 minutes. (If moisture is left on the

wheel, the wheel may warp.)

•

Do not store wheels in damp or wet loca-

tions.

Grinding on side of the wheel may cause

wheel damage.

Note: There may be other numbers inserted that

have meaning for a particular type of wheel. Refer

to the manufacturer’s technical data for a com-

plete explanation.

•

Replace wheels when the diameter becomes

2" smaller than its original size.

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4. An undamaged wheel will emit a clear metal-

lic ring or “ping” sound in each of these spots.

A damaged wheel will respond with a dull

thud that has no clear tone.

Wheel Inspection

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 in shipping, with age, or with

exposure to moisture.

5. If you determine from the ring test that the

wheel is damaged, DO NOT use it!

Wheel Dressing

First, do a Visual Inspection. Look for any

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

wheel. If you see any of these, DO NOT use the

wheel.

Depending on the type of grinding you do, the

grinding wheel may require periodic dressing.

Second, do a Ring Test. This test will give you an

indication of any internal damage that may not be

obvious during a visual inspection.

There are several different types of wheel dress-

ing devices available on the market (see Page

16). Dressing restores the abrasive quality of the

wheel surface and brings the wheel edge back to

a square form.

To perform a Ring Test:

1. Make sure the wheel that you test is clean and

Refer to the instructions that accompany your

dressing accessory for complete details on how

to properly dress a wheel.

dry; otherwise, you may get false results.

2. If size permits, balance the wheel with your

finger in the hole. If this is not possible, hang

the wheel in the air with a piece of cord or

string looped through the hole in the center.

Wheel Replacement

3. At the spots shown in Figure 3, gently tap

the wheel with a light non-metallic device

such as the handle of a screwdriver or a

wooden mallet.

The wheel guard assembly must be removed in

order to mount or dismount a grinding wheel.

To replace a grinding wheel:

1. UNPLUG THE GRINDER!

2. Remove the three Phillips head screws and

nuts that go through the outer guard. Take

off the outer guard and the rim guard.

��

3. Use a wrench on the nut that holds the wheel

on the arbor. Hold the wheel from turning

with your other hand. Note that the wheel on

the left-hand side of the machine has left-

handed threads, so the arbor nut on that side

must be turned clockwise to loosen.

��

Figure 3. Tapping locations when performing a

4. Remove the outer wheel flange and the

paper disc. Pull the wheel free from the

arbor. There will also be a paper disc and a

wheel flange on the other side of the wheel.

ring test.

-15-

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Accessories

ALWAYS visually inspect and perform a

“ring test” on a wheel before assembly. DO

NOT use damaged wheels!

Model H7763—Heavy Duty Grinder Stand

5. Mount the new wheel as shown in Figure

4. Always make certain there is a paper or

fiber disc between the wheel flanges and

the wheel itself. Tighten the nut snugly but

DO NOT over-tighten. Over-tightening can

crack the wheel.

NEVER assemble a grinding wheel on the

arbor without paper or fiber discs between

the wheel and the flange. Not using the

discs can put undue stress on the wheel,

causing it to crack and possibly fall apart.

Model H5891—¹⁄²Carat Diamond Dresser

Model H5892—³⁄⁴Carat Diamond Dresser

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H5891

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H7759 Replacement Wheels

Model H8872—10" Aluminum Oxide 36 Grit

Model H8874—10" Aluminum Oxide 60 Grit

Figure 4. Assembly order for wheel installation.

6. Re-install the spark deflectors and eye-

shields.

7. 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.

H7758 Replacement Wheels

Model G1982—8" Aluminum Oxide 36 Grit

Model G1983—8" Aluminum Oxide 60 Grit

Model G1984—8" Silicon Carbide 120 Grit

-16-

H7758/H7759 8" & 10" Bench Grinders

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SECTION 5: 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

at (570) 546-9663.

Troubleshooting

Motor & Electrical

Symptom

Possible Cause

Possible Solution

Motor will not start. 1.

Low voltage.

Open circuit in motor or loose connections.

Check power line for proper voltage.

Inspect all lead connections on motor for loose or open

connections.

Motor will not start; 1.

fuses or circuit

Short circuit in line cord or plug.

Inspect cord or plug for damaged insulation and shorted

wires.

Inspect all connections on motor for loose or shorted

terminals or worn insulation.

breakers blow.

Short circuit in motor or loose connections.

Incorrect fuses or circuit breakers in power line.

Install correct fuses or circuit breakers.

Motor overheats.

Motor overloaded.

Reduce load on motor.

Motor stalls (result- 1.

ing in blown fuses

Short circuit in motor or loose connections.

Inspect connections on motor for loose or shorted termi-

nals or worn insulation.

or tripped circuit).

Low voltage.

Incorrect fuses or circuit breakers in power line.

Motor overloaded.

Correct the low voltage conditions.

Install correct fuses or circuit breakers.

Reduce load on motor.

Machine

slows 1.

Operator is using too much pressure.

Use less pressure when grinding.

when operating.

Wavy

tion on surface of

workpiece.

condi- 1.

Machine vibrating.

Make sure machine is securely mounted on a solid sur-

face.

Use a holding device to firmly retain the workpiece.

Dress the grinding wheel.

Workpiece not being held firmly.

Wheel face uneven.

Wheel is too hard.

Use softer wheel, or reduce the feed rate.

Lines on surface of 1.

Impurity on wheel surface.

Workpiece not being held tightly.

Dress the grinding wheel.

Use a holding device to firmly retain the workpiece.

workpiece.

Burning

or cracks in the 2.

spots 1.

Improper type of grinding wheel.

Improper feed rate.

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

Slow down the rate of movement of the workpiece into

workpiece.

wheel.

Coolant required.

Add optional coolant system or introduce coolant by

hand.

Wheel dulls quickly, 1.

grit falls off.

Depth of cut too great.

Wheel is too soft.

Slow down the rate of movement of the workpiece into

wheel.

Wheel too soft for the material being ground, select

harder bond.

Wheel diameter too small.

Bad wheel dress.

Defective wheel bonding.

Replace the wheel.

Dress the wheel.

Consult manufacturer of grinding wheel.

Wheel clogs and 1.

workpiece shows

Wheel is too hard.

Wheel too hard for the material being ground, select

softer bond.

burn marks.

Feed rate too slow.

Increase the rate of movement of the workpiece into

wheel.

Bad wheel dress.

Coolant required.

Dress the wheel.

Add optional coolant system or introduce coolant by

hand.

-17-

H7758/H7759 8" & 10" Bench Grinders

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H7758 Parts Breakdown

-18-

H7758/H7759 8" & 10" Bench Grinders

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H7758 Parts List

REF PART #

DESCRIPTION

REF PART #

DESCRIPTION

PS09M

PW02M

PHLP HD SCR M5-.8 X 10

FLAT WASHER 5MM

PH7758031 STATOR

PH7758032 CORD CLIP

PH7758003 WHEEL COVER

PN21M HEX NUT M16-2 (LH)

PTLW01M

PS07M

EXT TOOTH WASHER 4MM

PHLP HD SCR M4-.7 X 8

BALL BEARING 6203

PH7758005 WHEEL FLANGE

P6203

PH7758006 WHEEL TYPE-1 36-GRIT 8" X 1" X 5/8"

PH7758036 ROTOR

PLW01M

PH7758008 LEFT SAFE GUARD

PN06M HEX NUT M5-.8

PH7758010 LEFT TOOL REST

LOCK WASHER 5MM

PH7758037 BASE

PH7758038 CORD BUSHING FIXED PLATE

PS05M

PHLP HD SCR M5-.8 X 8

PH7758040 CORD CLIP FIXED PLATE

PH7758041 CORD AND PLUG

PH7758042 SWITCH PLATE

PH7758043 SWITCH

PB17M

HEX BOLT M8-1.25 X 10

PH7758012 LEFT SPARK DEFLECTOR

PW03M

PB88M

FLAT WASHER 6MM

HEX BOLT M6-1 X 6

PH7758044 BASE BOTTOM COVER

PH7758045 RUBBER FOOT

PH7758015 BRACKET

PW01M

PB84M

FLAT WASHER 8MM

HEX BOLT M8-1.25 X 14

PH7758046 FENDER WASHER 5MM

PS40M

PS04M

PN03M

PHLP HD SCR M5-.8 X 16

PHLP HD SCR M8-1.25 X 20

HEX NUT M8-1.25

PH7758018 LEFT EYESHIELD MOUNTING ROD

PCB22M

PS38M

CARRIAGE BOLT M6-1 X 16

PHLP HD SCR M4-.7 X 10

PH7758050 CAPACITOR 20M 300VAC 2.5"L X 1.5"D

PH7758051 RIGHT SPARK DEFLECTOR

PH7758052 RIGHT TOOL REST

PH7758021 EYESHIELD PRESSURE PLATE

PH7758022 EYESHIELD

PW05M

PLW02M

PN04M

FLAT WASHER 4MM

LOCK WASHER 4MM

HEX NUT M4-.7

PH7758053 RIGHT SAFE GUARD

PH7758054 RIGHT EYESHIELD MOUNTING ROD

PH7758055 WHEEL TYPE-1 60-GRIT 8" X 1" X 5/8"

PLW03M

PN01M

LOCK WASHER 6MM

HEX NUT M6-1

PN13M

PH7758057 CAPACITOR HOLDER

PLW04M LOCK WASHER 8MM

PH7758059 MACHINE ID LABEL

HEX NUT M16-2

PS105M

PHLP HD SCR M5-.8 X 60

PH7758029 END BELL

PH7758030 WAVE LOCK WASHER 40MM

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.

-19-

H7758/H7759 8" & 10" Bench Grinders

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H7759 Parts Breakdown

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-20-

H7758/H7759 8" & 10" Bench Grinders

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H7759 Parts List

REF PART #

DESCRIPTION

REF PART #

DESCRIPTION

PS06M

PW02M

PHLP HD SCR M5-.8 X 20

FLAT WASHER 5MM

PH7759032 RIGHT END CAP

PH7759033 STAR KNOB M6-1 X 10

PH7759034 RIGHT WORK REST

PH7759003 RUBBER FOOT

PH7759004 BASE PLATE

PN06M

PH7759036 RIGHT SAFE GUARD

PS11M PHLP HD SCR M6-1 X 16

HEX NUT M5-.8

PB07M

HEX BOLT M8-1.25 X 25

LOCK WASHER 8MM

PLW04M

PH7759007 BASE

PH7759038 EYESHIELD MOUNTING ROD

PH7759039 EYESHIELD

PS05M

PHLP HD SCR M5-.8 X 8

PH7759009 SELF-LOCK SWITCH

PH7759010 CORD CLIP FIXED PLATE

PS09M

PHLP HD SCR M5-.8 X 10

PH7759041 SWITCH PLATE

PS05M

PHLP HD SCR M5-.8 X 8

PH7759042 CAPACITOR HOLDER

PH7759043 LEFT SAFE COVER

PH7759012 WIRE BUSHING

PH7759013 POWER CORD

PN36M

HEX NUT M20-2.5 LH

PS38M

PHLP HD SCR M4-.7 X 10

PH7759045 WHEEL TYPE-1 36 GRIT 10" X 1" X 1-1/4"

PH7759046 LEFT WHEEL GUARD

PW05M

PTLW01M

FLAT WASHER 4MM

EXT TOOTH WASHER 4MM

PH7759047 LEFT WORK REST

PH7759017 CORD CLIP

PH7759048 CAPACITOR 150M 125V 1.375"D X 3.125"L

PH7759049 RIGHT SPARK DEFECTOR

PH7759050 LEFT SPARK DEFECTOR

PH7759018 OUTER WHEEL FLANGE

PH7759019 WHEEL TYPE-1 60 GRIT 10" X 1" X 1-1/4"

PN28M

HEX NUT M20-2.5

PLW02M

LOCK WASHER 4MM

PH7759021 RIGHT WHEEL GUARD COVER

PH7759052 INNER WHEEL FLANGE

PH7759053 FENDER WASHER 5MM

PS105M

PS47M

PHLP HD SCR M5-.8 X 60

PHLP HD SCR M6-1 X 25

LOCK WASHER 6MM

PS07M

PN04M

PHLP HD SCR M4-.7 X 8

HEX NUT M4-.7

PLW03M

PH7759025 LEFT END CAP

PH7759056 DOME BOLT

PH7759026 WAVE LOCK WASHER 52MM

PH7759057 PRESSURE PLATE

PH7759058 BIG FLAT WASHER 8MM

P6205

BEARING 6205

PH7759028 LOCK WASHER

PH7759029 CENTRIFUGAL SWITCH

PH7759030 STATOR

PS106M

PHLP HD SCR M8-1.25 X 14

PH7759060 EYESHIELD PRESSURE PLATE

PH7759061 MACHINE ID LABEL

PH7759031 ROTOR

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.

-21-

H7758/H7759 8" & 10" Bench Grinders

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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.

-22-

H7758/H7759 8" & 10" Bench Grinders

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