Grizzly Grinder H8149 User Manual

MODEL H8148/H8149/H8150

HEAVY DUTY BENCH GRINDERS

OWNER'S MANUAL

MODEL H8148

MODEL H8149

MODEL H8150

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

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

#BL8860 PRINTED IN CHINA

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Table of Contents

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

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

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

H8148 Data Sheet...................................................................................................................... 3

H8149 Data Sheet...................................................................................................................... 4

H8150 Data Sheet...................................................................................................................... 5

Identification ............................................................................................................................... 6

SECTION 1: SAFETY....................................................................................................................... 7

Safety Instructions for Machinery............................................................................................... 7

Additional Safety Instructions for Grinders................................................................................. 9

SECTION 2: CIRCUIT REQUIREMENTS ...................................................................................... 10

110V Operation........................................................................................................................ 10

SECTION 3: SET UP...................................................................................................................... 11

Set Up Safety........................................................................................................................... 11

Items Needed for Setup........................................................................................................... 11

Unpacking ................................................................................................................................ 11

Inventory................................................................................................................................... 12

Hardware Recognition Chart.................................................................................................... 13

Site Considerations.................................................................................................................. 14

Mounting................................................................................................................................... 14

Tool Rest and Eye Shield ........................................................................................................ 15

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

SECTION 4: OPERATIONS ........................................................................................................... 17

Operation Safety ...................................................................................................................... 17

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

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

Wheel Selection ....................................................................................................................... 18

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

Wheel Dressing........................................................................................................................ 19

Wheel Replacement................................................................................................................. 19

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

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

Schedule .................................................................................................................................. 22

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

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

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

H8148 Wiring Diagram............................................................................................................. 24

H8149 Wiring Diagram............................................................................................................. 25

H8150 Wiring Diagram............................................................................................................. 26

Parts Breakdown...................................................................................................................... 27

Parts List .................................................................................................................................. 28

WARRANTY AND RETURNS........................................................................................................ 30

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INTRODUCTION

Contact Info

Foreword

If you have any comments regarding this manual,

please write to us at the address below:

We are proud to offer the Model H8148/H8149/

H8150 Heavy Duty Bench Grinders. This machine

is part of a growing Grizzly family of fine wood-

working and metalworking machinery. When used

according to the guidelines set forth in this manu-

al, you can expect years of trouble-free, enjoyable

operation and proof of Grizzly’s commitment to

customer satisfaction.

Grizzly Industrial, Inc.

Technical Documentation Manager

P.O. Box 2069

Bellingham, WA 98227-2069

Email: [email protected]

The specifications, drawings, and photographs

illustrated in this manual represent the Model

H8148/H8149/H8150 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.

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

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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Identification

Figure 1. Identification, Model H8150.

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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Safety Instructions for 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. ALWAYS wear safety glasses

when using this machine.

7. 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.

8. SIDE GRINDING. Grinding on the side of

wheels can cause 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 mounting a new

wheel, be sure the wheel RPM rating is

equal to 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 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 even more seri-

ous 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, allow it to gain full speed and wait for

at least 1 minute before standing in front of

it.

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 H8148/H8149/H8150 motor draws the

following amps under maximum load:

Motor Draw (H8148)................................5 Amps

Motor Draw (H8149) ................................8 Amps

Motor Draw (H8150).............................. 10 Amps

Circuit Recommendations

We recommend connecting your machine to a

dedicated and grounded circuit that is rated for

the amperage given below. Never replace a circuit

breaker on an existing circuit with one of higher

amperage without consulting a qualiﬁed electri-

cian to ensure compliance with wiring codes. If

you are unsure about the wiring codes in your

This machine must have a ground prong in

area or you plan to connect your machine to a

the plug to help ensure that it is grounded.

shared circuit, consult a qualified electrician.

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

110V Circuit (H8148/H8149/H8150)......15 Amps

installed by a qualified electrician.

Plug/Receptacle Type

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

Extension Cords

We do not recommend the use of extension cords,

but 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.

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

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SECTION 3: SET UP

Set Up Safety

Items Needed for

Setup

The following items are needed to complete the

setup 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

•

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

Wrench ¹⁄2".................................................. 1

Wrench 10mm............................................ 1

Phillips Head Screwdriver .......................... 1

Unpacking

Wear safety glasses dur-

ing the entire set up pro-

cess!

The Model H8148/H8149/H8150 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 H8150 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 condi-

tion of your shipment, inventory the contents.

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Inventory

After all the parts have been removed from the

box, you should have the following items:

Box Contents: (Figure 3 & 4)

Qty

A. Heavy-Duty Bench Grinder Unit

(Not Shown) ............................................... 1

B. Left Lens Hanger........................................ 1

Right Lens Hanger (Not Shown)................ 1

C. Left Spark Arrestor..................................... 1

Right Spark Arrestor (Not Shown) ............. 1

D. Lens............................................................ 2

E. Nut Plates................................................... 2

F. Left Tool Rest ............................................ 1

Right Tool Rest (Not Shown) ..................... 1

Figure 4. Left tool rest

If any nonproprietary 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.

G. Hardware and Tools (Not Shown):

Qty

—Flange Screws M6-1 x 12mm

(Eye Shield) ............................................ 2

—Lock Washers 7mm (Eye Shield)........... 2

—Flat Washers 7mm (Eye Shield)............. 2

—Female Knobs M6-1.25 (Eye Shield) ..... 2

—Hex Bolts M6-1.25 x 10mm (Eye Shield)4

—Flat Washers 7mm (Eye Shield)............. 4

NOTICE

Some hardware/fasteners on the inventory

list may arrive pre-installed. Check mount-

ing locations before assuming that any

items from the inventory list are missing.

—Phillips Head Screws #10-24 x ³⁄8

(Eye Shield) ............................................ 4

—Flat Washers 8mm (Tool Rest) .............. 4

—Hex Bolts ⁵⁄16"-18 x ³⁄4" (Tool Rest) ......... 4

Figure 3. Left eye shield assembly.

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Hardware Recognition Chart

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Site Considerations

Children and visitors may be

seriously injured if unsuper-

vised. Lock all entrances to

the shop when you are away.

DO NOT allow unsupervised

children or visitors in your

shop at any time!

Bench 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 both the machine and the

workpiece.

Placement Location

Consider existing and anticipated needs, size of

material to be processed through each machine,

and space for auxiliary stands, work tables or

other machinery when establishing a location for

your new machine. See Figure 5 for the minimum

working clearances.

Mounting

The Heavy-Duty Bench Grinder must be mounted

to a workbench to avoid accidental tipping. If you

intend to use the grinder for portable applica-

tions, mount it to a heavy plywood base (at least

1" thick) that is wide enough to prevent tipping or

rocking during use, then clamp the plywood base

to the workbench or table.

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To mount the Heavy-Duty Bench Grinder:

Model

H8148

1. Once you have confirmed that your grinder

is running properly, mount it to a workbench

through the holes in the base using the

dimensions in Figure 6. DO NOT overtighten

the mounting bolts or you will crack the

base.

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Model

H8149

Holes are ⁵⁄16" Diameter

H8848: A = 6⁵⁄16"

H8849: A = 7⁵⁄16"

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H8850: A = 8³⁄4

Figure 6. Bench grinder mounting bolt pattern.

Model

H8150

Figure 5. Minimum working clearances.

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The strongest mounting option is a "Through

Mount" where holes are drilled all the way through

the workbench, and hex bolts, washers, and hex

nuts are used to secure the grinder to the work-

bench.

Tool Rest and Eye

Shield

The tool rest supports the workpiece during grind-

ing. Certain types of grinding may require jigs or

accessories to assure the proper angle of the

workpiece against the wheel.

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The eye shield must be installed and positioned

between the grinding wheel and your face during

grinding. The eye shield is NOT a substitute for

safety glasses or a safety face shield. You must

wear ANSI approved face and eye protection.

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To assemble the tool rest and eye shield:

1. Using the hardware from the inventory list on

Page 12, assemble the left tool rest and eye

shield as shown in Figures 9 & 10.

Figure 7. Example of a through mount setup.

Another option for mounting is a "Direct Mount"

where the machine is simply secured to the work-

bench with a lag screw.

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Figure 8. Example of a direct mount setup.

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2. Check the stability of the mounted grinder

to make sure it is stable enough to be used

safely.

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Figure 9. Left eye shield and tool rest assembly.

3. Always make sure the grinder is bolted or

clamped to the workbench, table, or grinder

stand before use.

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3. Make sure you have read the safety instruc-

tions at the beginning of the manual and that

the grinder is is setup properly.

4. Make sure all tools and objects used during

set up are cleared away from the grinder.

5. Flip the switch up to turn the grinder ON.

Make sure that your hand stays poised over

the switch in case you need to quickly turn

the machine OFF.

6. Listen to and watch for abnormal noises or

actions. Under normal conditions, the grinder

will make a humming noise, with only minor

vibration.

—Strange or unusual noises should be inves-

tigated and corrected before operating the

machine further. Always disconnect the

machine from power before investigating

or correcting potential problems.

7. Turn the grinder OFF.

Figure 10. Left tool rest and eye shield

assembly.

8. On Model H8148 and H8149 remove the

safety key (Figure 11) and attempt to turn the

machine ON.

2. Assemble the right tool rest and eye shield in

the same manner.

—If the grinder does not start, the switch dis-

abling feature is working.

Test Run

—If the grinder starts, stop it. The switch dis-

abling feature is not working. This safety

feature must work properly before pro-

ceeding. Call Tech Support for help.

Once your machine is mounted and assembly is

complete, test run your machine to make sure it

runs properly.

If, during the test run, you cannot easily locate

the source of an unusual noise or vibration, stop

using the machine immediately, then review the

Troubleshooting on Page 23.

If you still cannot remedy a problem, contact our

Tech Support at (570) 546-9663 for assistance.

To test run the machine:

1. Make sure the switch is in the OFF position.

2. Connect the grinder to the power source.

Figure 11. Disabling switch.

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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 on Page 18 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.

•

Grasp the workpiece firmly and properly

support it on the tool rest during grinding.

Maintain even pressure and control of the

workpiece when grinding.

DO NOT use this grinder with a liquid cool-

ing system required for wet grinding wheel

operations. The electrical system is not

waterproof. Ignoring this warning can lead

to electrocution.

•

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 H8148/

H8149/H8150 are not designed for side

grinding.

NOTICE

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.

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Wheel Care

Wheel Selection

Your safety when grinding depends, in large part,

on the condition of the wheel during grinding. A

wheel in poor condition presents the possibility

of breaking apart during rotation and injuring the

operator and possibly causing property damage.

The Model H8148 only accepts Type 1 wheels

with a ⁄2" bore. The Model H8149 only accepts

Type 1 wheels with a ⁵⁄8" bore. The Model H8150

only accepts Type 1 wheels with a 1" bore.

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.

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:

•

Select the right grinding wheel for the job.

DO NOT grind material inappropriate for the

wheel type.

Abrasive

Type

Bond

Type

Prefix

Grit Size Grade

Select the right wheel for the machine. If a

grinding wheel rotates faster than its RPM

rating, it may fly apart.

The Prefix is the manufacturer’s designation for a

particular wheel type (eg, Type 1 wheels).

Mount the wheels properly. (See the Wheel

Replacement instructions on Page 19 for

guidance.) Never use a wheel with the wrong

arbor size for the grinder.

The most common Abrasive Types used are 'A'

for Aluminum Oxide, 'C' for Silicon Carbide, and

occasionally 'SG' for Seeded Gel.

•

Do not abuse the wheel by jamming the work

into the grinding wheel with excessive force.

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.

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.

•

Do not store wheels in damp or wet loca-

tions.

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.

Grinding on the side of the wheel may cause

wheel damage.

Replace wheels when the diameter becomes

2" smaller than its original size.

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.

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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

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 mois-

ture. Inspect every wheel for damage.

5. If you determine from the ring test that the

wheel is damaged, DO NOT use it!

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.

Wheel Dressing

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

21). 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

dry; otherwise, you may get false results.

Refer to the instructions that accompany your

dressing accessory for complete details on how

to properly dress a wheel.

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 12, 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, and

remove the outer guard.

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3. Hold the wheel from turning, and remove the

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arbor nut which holds the wheel on.

Note: The arbor shaft and nut on the left

hand side of the grinder is a left hand thread,

so loosening it will require turning it clock-

wise.

Figure 12. Tapping locations when performing a

ring test.

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4. Remove the outer wheel flange and the

paper disc. Pull the wheel free from the arbor,

but leave the paper disc and a wheel flange

on the other side of the wheel.

NEVER assemble a grinding wheel on the

arbor without paper or fiber discs between

the wheel and the flange. Omitting the discs

can put uneven stress on the wheel, causing

it to crack and possibly fly apart. ALWAYS

“ring test” a wheel before assembly to make

certain it has no cracks or flaws.

5. Mount the new wheel as shown in Figure 13

and 14. Always make certain there is a paper

or fiber disc between the wheel flanges and

the wheel itself. Tighten the arbor nut snugly

but DO NOT over-tighten. Over-tightening

can crack the wheel.

Figure 14. Grinding wheel installation order.

6. 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.

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Figure 13. Assembly order for wheel installation.

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ACCESSORIES

SECTION 5: ACCESSORIES

G7120—Heavy Duty Grinder Stand

This is one of the most stable bench grinder

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!

stands on the market. Once you have one, you’ll

wonder how you ever got along without it. 32¹⁄2

”

high. Universal mounting plate may require modi-

fications for some bench grinders. Buffer/Sander

not included. 49 lbs.

H1300

H1298

G7984

Figure 15. Model G7120.

H0736

H2347

H5891—¹⁄2 Carat Diamond Dresser

Figure 17. Our most popular safety glasses.

H5892—³⁄4 Carat Diamond Dresser

Industrial diamond for dressing grinding wheels.

8¹⁄4" long round body with knurled grip for maxi-

mum control. Includes protective rubber end cap.

Type 1 Aluminum Oxide Replacement Wheels

G1979—6" Wheel, 36 Grit, ¹⁄2 Bore

G1980—6" Wheel, 60 Grit, ¹⁄2" Bore

G1982—8" Wheel, 36 Grit, ⁵⁄8 Bore

G1983—8" Wheel, 60 Grit, ⁵⁄8" Bore

H8882—10" Wheel, 24 Grit, 1¹⁄4"Bore (1" w/

bushing installed)

H8883—10" Wheel, 36 Grit, 1¹⁄4"Bore (1" w/

bushing installed)

H5892

H5891

Figure 16. Diamond Dressers.

-21-

H8148/H8149/H8150 Heavy Duty Bench Grinder

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SECTION 6: MAINTENANCE

Grinding Wheels

Always disconnect power

to the machine before

The grinding wheel should be inspected before

performing maintenance.

every use. Use the ring test method noted in

Failure to do this may

Wheel Inspection on Page 19 to verify the

result in serious person-

structural integrity. Take care in storing grinding

al injury.

wheels to keep them free from potential damage

by being dropped, or having other items drop on

them.

Schedule

Replace the wheel when the wheel diameter

is reduced to 2" smaller than its original size.

For optimum performance from your machine,

Operating at anything less than this diameter

follow this maintenance schedule and refer to

does not allow the proper surface speed for grind-

any specific instructions given in this section.

ing or spacing of the tool rest and the eye shield,

Routinely check the condition of the following

and the grinding wheel may fly apart.

items and repair or replace as necessary:

•

Cracked or loose grinding wheel.

Loose mounting bolts.

Worn switch.

Worn or damaged cords and plugs.

Any other condition that could hamper the

safe operation of this machine.

-22-

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SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-

ops. 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. Lockout key is at fault (H8148, H8149).

1. Install/replace lockout key; replace switch.

2. Open circuit in motor or loose connections. 2. Inspect/repair all lead connections on motor for

loose or open connections.

fuses or circuit

breakers blow.

3. Start capacitor is at fault.

3. Replace start capacitor.

4. Short circuit in motor or loose connections. 4. Inspect all connections on motor for loose or shorted

terminals or worn insulation.

5. Incorrect fuses or circuit breakers in power 5. Install correct fuses or circuit breakers.

supply.

Motor overheats, 1. Motor overloaded.

1. Reduce load on motor.

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

terminals or worn insulation.

stalls

in blown fuses or

tripped circuit).

(resulting

3. Depth of cut too great.

3. Slow down rate of movement of workpiece.

Grinder Operations

Symptom

Possible Cause

Possible Solution

Wavy

tion on surface of

workpiece.

condi- 1. Machine vibrating.

1. Make sure machine is securely mounted on a solid

surface.

2. Workpiece is not held in place firmly.

3. Wheel face uneven.

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

3. Dress the grinding wheel.

4. Wheel is too hard.

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

Lines on surface of 1. Impurity on wheel surface.

1. Dress the grinding wheel.

workpiece.

2. Workpiece not being held tightly.

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

Burning

or cracks in the

workpiece.

spots 1. Improper type of grinding wheel.

1. Try a wheel that is softer style or a coarser grit.

2. Slow down the rate of movement of the workpiece

into wheel.

2. Improper feed rate.

Wheel dulls quickly, 1. Depth of cut too great.

grit falls off.

1. Slow down the rate of movement of the workpiece

into wheel.

2. Wheel is too soft.

2. Wheel too soft for the material being ground, select

harder bond.

3. Wheel diameter too small.

4. Bad wheel dress.

3. Replace the wheel.

4. Dress the wheel.

5. Defective wheel bonding.

5. Consult manufacturer of grinding wheel.

Wheel clogs and 1. Wheel is too hard.

workpiece shows

1. Wheel too hard for the material being ground, select

softer bond.

burn marks.

2. Feed rate too slow.

2. Increase the rate of movement of the workpiece into

wheel.

3. Bad wheel dress.

3. Dress the wheel.

4. Wrong material is being ground.

4. Grind ferrious metals only.

-23-

H8148/H8149/H8150 Heavy Duty Bench Grinder

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H8148 Wiring Diagram

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Figure 18. H8148 Wiring.

-24-

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H8149 Wiring Diagram

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Figure 19. H8149 Wiring.

H8148/H8149/H8150 Heavy Duty Bench Grinder

-25-

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H8150 Wiring Diagram

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Figure 20. H8150 Wiring.

H8148/H8149/H8150 Heavy Duty Bench Ginders

-26-

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Parts Breakdown

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-27-

H8148/H8149/H8150 Heavy Duty Bench Grinder

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Parts List

REF PART #

DESCRIPTION

REF PART #

DESCRIPTION

PH8148001 FLAT WASHER 5MM (H8148/H8149)

PH8150001 FLAT WASHER 1/4 (H8150)

PH8148028 WIRE PLATE

PH8148029 STRAIN RELIEF

PH8148002 DATA/WARNING LABEL (H8148)

PH8149002 DATA/WARNING LABEL (H8149)

PH8150002 DATA/WARNING LABEL (H8150)

PB07

HEX BOLT 5/16-18 X 3/4

FLAT WASHER 8MM

PW01M

PH8148032 RIGHT TOOL REST (H8148)

PH8149032 RIGHT TOOL REST (H8149)

PH8150032 RIGHT TOOL REST (H8150)

PH8148033 LEFT TOOL REST (H8148)

PH8149033 LEFT TOOL REST (H8149)

PH8150033 LEFT TOOL REST (H8150)

PFS02M

PLW17M

PS06

FLANGE SCREW M6-1 X 12

LOCK WASHER 7MM

PHLP HD SCR 10-24 X 3/8

PH8148006 FEMALE KNOB 1/4-20

PS18

PHLP HD SCR 10-24 X 1/4

(H8148/H8149)

PS04

PHLP HD SCR 1/4-20 X 1/2

PS04

PHLP HD SCR 1/4-20 X 1/2 (H8150)

HEX BOLT M6-1.25 X 10

PH8148035 LEFT OUTER WHEEL GUARD (H8148)

PH8149035 LEFT OUTER WHEEL GUARD (H8149)

PH8150035 LEFT OUTER WHEEL GUARD (H8150)

PH8148036 RIGHT OUTER WHEEL GUARD (H8148)

PH8149036 RIGHT OUTER WHEEL GUARD (H8149)

PH8150036 RIGHT OUTER WHEEL GUARD (H8150)

PH8148037 RIGHT 1/2" ARBOR NUT (H8148)

PH8149037 RIGHT 5/8" ARBOR NUT (H8149)

PH8150037 RIGHT 1" ARBOR NUT (H8150)

PB17M

PH8148009 NUTPLATE

PH8148010 EYESHIELD (H8148)

PH8149010 EYESHIELD (H8149)

PH8150010 EYESHIELD (H8150)

PH8148011 LEFT BRACKET (H8148/H8149)

PH8150011 LEFT BRACKET (H8150)

PH8148012 RIGHT BRACKET (H8148/H8149)

PH8150012 RIGHT BRACKET (H8150)

PH8148013 LEFT SPARK ARRESTOR (H8148/H8149)

PH8150013 LEFT SPARK ARRESTOR (H8150)

PH8148014 RIGHT SPARK ARRESTOR (H8148/H8149)

PH8150014 RIGHT SPARK ARRESTOR (H8150)

PH8148015 ARROW LABEL

PH8148038 LEFT 1/2" ARBOR NUT (H8148)

PH8149038 LEFT 5/8" ARBOR NUT (H8149)

PH8150038 LEFT 1" ARBOR NUT (H8150)

PH8148039 1/2" BORE A60 GRINDING WHEEL (H8148)

PH8149039 5/8" BORE A60 GRINDING WHEEL (H8149)

PH8150039 1" BORE A60 GRINDING WHEEL (H8150)

PH8148040 1/2" BORE A36 GRINDING WHEEL (H8148)

PH8149040 5/8" BORE A36 GRINDING WHEEL (H8149)

PH8150040 1" BORE A36 GRINDING WHEEL (H8150)

PH8148041 1/2" WHEEL FLANGE (H8148)

PH8148016 RUBBER FOOT (H8148)

PH8149016 RUBBER FOOT (H8149)

PH8150016 RUBBER FOOT (H8150)

PH8148017 BASE PLATE (H8148)

PH8149017 BASE PLATE (H8149)

PH8149041 5/8" WHEEL FLANGE (H8149)

PH8150017 BASE PLATE (H8150)

PH8150041 1" WHEEL FLANGE (H8150)

PH8148018 SWITCH PLATE (H8148)

PH8149018 SWITCH PLATE (H8149/H8150)

PS04

PHLP HD SCR 1/4-20 X 1/2

PH8148043 RIGHT INNER WHEEL GUARD (H8148)

PH8149043 RIGHT INNER WHEEL GUARD (H8149)

PH8150043 RIGHT INNER WHEEL GUARD (H8150)

PH8148044 LEFT INNER WHEEL GUARD (H8148)

PH8149044 LEFT INNER WHEEL GUARD (H8149)

PH8150044 LEFT INNER WHEEL GUARD (H8150)

G8988

SAFETY PADDLE SWITCH

(H8148/H8149)

PH8150019 TOGGLE SWITCH RF-1001 (H8150)

PLW01M LOCK WASHER 5MM

PH8148021 COPPER WASHER 5MM

PS18 PHLP HD SCR 10-24 X 1/4

PS22

PHLP HD SCR 10-24 X 5/8

PH8148023 POWER CORD 110V

PH8148046 CENTRIFUGAL SWITCH PLATE (H8148)

PH8149046 CENTRIFUGAL SWITCH PLATE (H8149)

PH8150046 CENTRIFUGAL SWITCH PLATE (H8150)

PH8148047 CENTRIFUGAL SWITCH ASSY. (H8148)

PH8149047 CENTRIFUGAL SWITCH ASSY. (H8149)

PH8150047 CENTRIFUGAL SWITCH ASSY. (H8150)

PH8148048 MOTOR COVER (H8148)

PH8148024 CAPACITOR CAP (H8148/H8149)

PH8150024 CAPACITOR CAP (H8150)

PH8148025 FIXTURE CLIP (H8148/H8149)

PH8150025 FIXTURE CLIP (H8150)

PH8148026 CAPACITOR 100MFD 125V (H8148)

PH8149026 CAPACITOR 200MFD 125V (H8149)

PH8150026 CAPACITOR 300MFD 125V (H8150)

PH8149048 MOTOR COVER (H8149)

PS18

PHLP HD SCR 10-24 X 1/4

PH8150048 MOTOR COVER (H8150)

-28-

H8148/H8149/H8150 Heavy Duty Bench Ginders

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REF PART #

DESCRIPTION

REF PART #

DESCRIPTION

P6202

P6204

P6206

BALL BEARING 6202ZZ (H8148)

BALL BEARING 6204ZZ (H8149)

BALL BEARING 6206ZZ (H8150)

PH8148055 MOTOR HOUSING (H8148)

PH8149055 MOTOR HOUSING (H8149)

PH8150055 MOTOR HOUSING (H8150)

PH8148056 STRAIN RELIEF

PH8148050 FAN (H8148)

PH8149050 FAN (H8149)

PH8150050 FAN (H8150)

PH8148057 STATOR (H8148)

PH8149057 STATOR (H8149)

PN05

HEX NUT 1/4-20

PH8150057 STATOR (H8150)

PW09M

PSS07

FLAT WASHER 7MM

SET SCREW 1/4-20 X 1/2

PS06

PHLP HD SCR 10-24 X 3/8

PH8148060 ROTOR AND SHAFT (H8148)

PH8149060 ROTOR AND SHAFT (H8149)

PH8150060 ROTOR AND SHAFT (H8150)

PH8148054 BASE (H8148)

PH8149054 BASE (H8149)

PH8150054 BASE (H8150)

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.

-29-

H8148/H8149/H8150 Heavy Duty Bench Grinder

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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.

-30-

H8148/H8149/H8150 Heavy Duty Bench Ginders

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