Grizzly Grinder H7757 User Manual

Model H7757  
3" MINI WOOL BUFFER  
OWNER'S MANUAL  
COPYRIGHT © DECEMBER, 2005 BY GRIZZLY INDUSTRIAL, INC.  
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE  
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.  
#JK7772 PRINTED IN CHINA  
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Table of Contents  
SECTION 1: SAFETY.......................................................................................................2  
SECTION 2: INTRODUCTION .........................................................................................5  
Foreword.....................................................................................................................5  
Contact Information ....................................................................................................5  
SECTION 3: SET UP........................................................................................................6  
Unpacking...................................................................................................................6  
Inventory.....................................................................................................................6  
Items Needed for Set Up............................................................................................7  
Tool Rests ..................................................................................................................7  
Eye Shields.................................................................................................................7  
Mounting.....................................................................................................................8  
SECTION 4: OPERATIONS.............................................................................................9  
Test Run.....................................................................................................................9  
Grinding and Buffing.................................................................................................10  
Wheel Care...............................................................................................................10  
Grinding Wheel Dressing..........................................................................................11  
Buffing Wheel Care ..................................................................................................11  
Wheel Selection........................................................................................................12  
Wheel Inspection......................................................................................................12  
Replacing Wheels.....................................................................................................13  
SECTION 5: ACCESSORIES.........................................................................................15  
SECTION 5: MAINTENANCE ........................................................................................16  
General.....................................................................................................................16  
Lubrication ................................................................................................................16  
Grinding Wheels .......................................................................................................16  
Buffing Wheels .........................................................................................................16  
SECTION 6: SERVICE...................................................................................................17  
Troubleshooting........................................................................................................17  
Parts Breakdown ......................................................................................................18  
Parts List...................................................................................................................19  
WARRANTY AND RETURNS........................................................................................20  
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SECTION 1: SAFETY  
For Your Own Safety Read Instruction Manual  
Before Operating This Equipment  
The purpose of safety symbols is to attract your attention to possible hazard-  
ous 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 infor-  
NOTICE  
mation about proper operation of the equipment.  
Safety Instructions for Machinery  
4.  
ALWAYS  
USE  
HEARING  
1.  
2.  
READ THROUGH THE ENTIRE  
MANUAL BEFORE STARTING  
MACHINERY. Machinery presents  
serious injury hazards to untrained  
users.  
PROTECTIONWHENOPERATING  
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  
contain long hair and wear non-slip  
footwear.  
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.  
-2-  
Model H7757 3" Mini Wool Buffer  
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7.  
ONLY ALLOW TRAINED AND  
PROPERLY SUPERVISED PER-  
SONNEL TO OPERATE MACHIN-  
ERY. Make sure operation instruc-  
tions are safe and clearly under-  
stood.  
16. MAKE SURE GUARDS ARE IN  
PLACE AND WORK CORRECTLY  
BEFORE USING MACHINERY.  
17. REMOVE ADJUSTING KEYS  
AND WRENCHES. Make a habit  
of checking for keys and adjusting  
wrenches before turning machinery  
ON.  
8.  
9.  
KEEP CHILDREN AND VISITORS  
AWAY. Keep all children and visi-  
tors a safe distance from the work  
area.  
18. CHECK FOR DAMAGED PARTS  
BEFORE USING MACHINERY.  
Check for binding and alignment  
of parts, broken parts, part mount-  
ing, loose bolts, and any other  
conditions that may affect machine  
operation. Repair or replace dam-  
aged parts.  
MAKE  
WORKSHOP  
CHILD  
PROOF. Use padlocks, master  
switches, and remove switch keys.  
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.  
19. DO NOT FORCE MACHINERY.  
Work at the speed for which  
the machine or accessory was  
designed.  
11. DO NOT USE IN DANGEROUS  
ENVIRONMENTS. DO NOT use  
machinery in damp, wet locations,  
or where any flammable or noxious  
fumes may exist.  
20. SECURE WORKPIECE. Use  
clamps or  
a
vise to hold the  
workpiece when practical.  
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 shad-  
ows may cause accidents.  
21. DO NOT OVERREACH. Keep  
proper footing and balance at all  
times.  
13. USE A GROUNDED EXTENSION  
CORD RATEDFORTHEMACHINE  
AMPERAGE. Undersized cords  
overheat and lose power. Replace  
extension cords if they become  
damaged. DO NOT use extension  
cords for 220V machinery.  
22. MANY MACHINES WILL EJECT  
THE WORKPIECE TOWARD THE  
OPERATOR. Know and avoid con-  
ditions that cause the workpiece to  
"kickback."  
14. ALWAYS DISCONNECT FROM  
POWER  
SOURCE  
BEFORE  
23. ALWAYS LOCK MOBILE BASES  
(IF USED) BEFORE OPERATING  
MACHINERY.  
SERVICING MACHINERY. Make  
sure switch is in OFF position before  
reconnecting.  
24. BE AWARE THAT CERTAIN  
DUST MAY BE HAZARDOUS to  
the respiratory systems 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 perfor-  
mance. Follow instructions for lubri-  
cating and changing accessories.  
Model H7757 3" Mini Wool Buffer  
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Safety Instructions for the 3" Mini Wool Buffer  
1.  
EYE PROTECTION. Grinding  
causes small particles to become  
airborne at a high rate of speed.  
ALWAYS wear safety glasses  
when using this machine.  
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.  
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.  
2.  
MOUNTING TO BENCH/STAND.  
An unsecured grinder may become  
dangerously out of control during  
operation. Make sure grinder is  
FIRMLY secured to a bench/stand  
before use.  
10. HAND TO WHEEL CONTACT.  
Grinding wheels can remove a lot  
of skin quickly. 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 serious entangle-  
ment injuries.  
3.  
WHEEL  
SPEED  
RATING.  
Grinding wheels operated 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 or higher than  
the speed of the buffer.  
4.  
6.  
WHEEL FLANGES. Only use the  
flanges included with the buffer  
when mounting wheels. Other  
flanges may not properly secure  
the wheel and cause an accident.  
11. TOOL REST POSITION. If the tool  
rest 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.  
1
Keep the tool rest within 8" from  
the wheel when operating.  
STARTING BUFFER. If a grinding  
wheel is damaged, it will usually  
fly apart shortly after start-up. To  
protect yourself, always stand to  
the side of the buffer 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!  
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.  
-4-  
Model H7757 3" Mini Wool Buffer  
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SECTION 2: INTRODUCTION  
Foreword  
Contact Information  
We are proud to offer the Grizzly Model  
H7757 3" Mini Wool Buffer. This Model  
is part of a growing Grizzly family of fine  
power tools. 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 commit-  
ment to customer satisfaction.  
If you have any comments regarding this  
manual, please write to us at the following  
address:  
Grizzly Industrial, Inc.  
C/O Technical Documentation  
P.O. Box 2069  
Bellingham, WA 98227-2069  
It is our pleasure to provide this manual  
with the Model H7757. It was written  
to encourage safety considerations and  
guide you through general operating pro-  
cedures and maintenance.  
Most importantly, we stand behind our  
tools. 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, details, and photo-  
graphs in this manual represent the Model  
H7757 as supplied when the manual was  
prepared. However, owing to Grizzly’s pol-  
icy of continuous improvement, changes  
may be made at any time with no obliga-  
tion on the part of Grizzly.  
Read the manual before operation.  
Become familiar with this machine, its  
safety instructions, and its operation  
before beginning any work. Serious  
personal injury may result if safety or  
operational information is not under-  
stood or followed.  
Model H7757 3" Mini Wool Buffer  
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SECTION 3: SET UP  
Unpacking  
Inventory  
Your mini wool buffer left our warehouse in  
a carefully packed box. If you discover the  
mini wool buffer is damaged after you have  
signed for delivery, please immediately call  
Customer Service at (570) 546-9663 for  
advice.  
After you have unpacked the carton you  
should find the following.  
Model H7757 Inventory (Figure 1)  
A. Buffer ................................................. 1  
B. Eye Shield Brackets........................... 2  
C. Tool Rests.......................................... 2  
D. Eye Shields........................................ 2  
Save the containers and all packing materi-  
als for possible inspection by the carrier or  
its agent. Otherwise, filing a freight claim  
can be difficult.  
Tools and Hardware  
Phillips Head Screws M5-.8 x 12 ............. 4  
Wing Bolts M4-.7 x 10.............................. 2  
Phillips Head Screws M4-.7 x 40 ............. 1  
Flat Washers 4mm ................................... 2  
Flat Washers 5mm ................................... 4  
Hex Nuts M5-.8 ........................................ 4  
Hex Nuts M4-.7 ........................................ 2  
Lock Washers 5mm.................................. 4  
Lock Washers 4mm.................................. 2  
Wrench 7mm x 10mm.............................. 1  
Wrench 8mm x 10mm.............................. 1  
When you are completely satisfied with  
the condition of the shipment, you should  
inventory the equipment.  
A
D
B
C
Figure 1. Model H7757 inventory  
-6-  
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2. Adjust both tool rests approximately 18  
"
Items Needed  
for Set Up  
from the grinding and buffing wheels  
and tighten the wing bolts. Figure 2  
shows the correct adjustment for the  
tool rest at the grinding wheel.  
The following items are needed to com-  
plete the set up process, but are not  
included with your machine:  
116" Gap  
Description  
Safety Glasses (for each person)............. 1  
Phillips Head Screwdriver ........................ 1  
Qty  
Wing Bolt  
Tool Rest  
Optional Items for Mounting  
Flat Washer  
Drill with 4mm bit...................................... 1  
Wrench 4mm............................................ 1  
Hex Bolts M4x.7 (length varies) ............... 3  
Hex Nuts M4-.7 ........................................ 3  
Flat Washers 4mm ................................... 3  
Lock Washers 4mm.................................. 3  
Figure 2. Tool Rest Installation.  
Eye Shields  
The eye shield must be positioned between  
the grinding or buffing wheel and the  
operator’s face to protect the operator from  
flying debris. The eye shields are not a  
replacement for safety glasses!  
Tool Rests  
The tool rests attach to the inward side of  
the guard and must be used to support  
the workpiece during operation. Failure to  
install and use the tool rests can lead to  
serious personal injury!  
Components/Hardware Required Qty  
Eye Shields .............................................. 2  
Eye Shield Brackets ................................. 2  
Phillips Head Screws M4-.7 x 40 ............. 2  
Hex Nuts M4-.7 ........................................ 2  
Flat Washers 4mm ................................... 2  
Phillips Head Screws M5-.8 x 12 ............. 4  
Flat Washers 5mm ................................... 4  
Hex Nuts M5-.8 ........................................ 4  
Lock Washers 5mm.................................. 4  
Lock Washers 4mm.................................. 2  
Components/Hardware Required Qty  
Tool Rests ................................................ 2  
Wing Bolts M3-.5 x 10.............................. 2  
Flat Washers 4mm ................................... 2  
To install the tool rests:  
1. Loosely attach the tool rests perpen-  
dicular to the surface of each wheel  
with the wing bolts and 4mm washers.  
To install the eye shields:  
1. Attach the eye shield brackets to the  
buffer with the 5mm Phillips head  
screws, flat washers, lock washers and  
hex nuts, as shown in Figure 3.  
Model H7757 3" Mini Wool Buffer  
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To secure the buffer to a benchtop or  
mounting board:  
Screw  
1. Place the buffer on a workbench or  
mounting board no smaller than 12"W  
x 10"D.  
Flat Washer  
Hex Nut  
2. Using the 4mm holes in the buffer base  
as a template, drill holes through the  
mounting board or benchtop as appro-  
priate.  
Lock Washer  
Figure 3. Eye Shield Bracket Installation.  
2. Attach the eye shield to the bracket  
with the 4mm Phillips head screws, flat  
washers, lock washers and hex nuts as  
shown in Figure 4. The hex nut should  
be tightened to a point where the eye  
shields are stiff to move.  
3. Secure the buffer to the benchtop or  
mounting board with 4mm hex bolts,  
washers, lock washers, and hex nuts  
as shown in Figures 5 & 6.  
Screw  
Hex Nut  
Flat Washer  
Figure 5. Mounting the buffer (front).  
Figure 4. Eye Shield Installation.  
Mounting  
The buffer must be mounted to a benchtop  
or mounting board before it can be used.  
An unmounted buffer can become unbal-  
anced when in use, potentially causing  
serious injury.  
Figure 6. Mounting the buffer (back).  
Components/Hardware Required Qty  
Hex Bolts M4-.7 (length varies)................ 3  
Hex Nuts M4-.7 ........................................ 3  
Flat Washers 4mm ................................... 3  
Lock Washers 4mm.................................. 3  
-8-  
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SECTION 4: OPERATIONS  
Test Run  
Using this machine produces dust  
which may cause eye injuries or  
respiratory problems. Protect your-  
self by wearing safety glasses and a  
respirator during the entire operation  
process.  
To test run the buffer:  
1. Plug the machine into the power  
source.  
2. Stand to the side of the buffer and turn  
the machine ON.  
The machine should run smoothly with  
little or no vibration or rubbing noises.  
Strange or unusual noises should be inves-  
tigated and corrected before operating the  
machine further. If the machine seems  
okay, stay out of the line of rotation of  
either wheel and let it run for approximate-  
ly one minute to make sure the wheels are  
structurally sound and safe to use.  
Keep loose clothing  
rolled up and out of  
the way of machin-  
ery and keep hair  
pulled back.  
If you cannot easily locate the source of  
an unusual noise or vibration, contact our  
Technical Support department for help.  
Disconnect  
power  
from the machine  
when performing any  
maintenance, assem-  
bly or adjustments.  
Failure to do this may  
result in serious per-  
sonal injury.  
All grinding wheels, regardless of  
size, have the potential of breaking  
apart during operation, causing seri-  
ous personal injury or death! Always  
stand to the side of the grinder when  
turning it ON and wear the proper  
safety equipment to protect yourself.  
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-9-  
Grinding and Buffing  
Wheel Care  
The processes for grinding and buffing  
with the H7757 are very similar.  
Your safety largely depends on the con-  
dition of the wheels during grinding or  
buffing. A grinding wheel in poor condition  
presents the possibility of breaking apart  
during rotation and injuring the operator,  
while a buffing wheel in poor condition  
can tear apart and snag a workpiece,  
potentially causing serious entanglement  
injuries.  
To grind or buff:  
1. Ensure all eye shields are in place and  
that you are wearing the appropriate  
safety gear.  
2. With the machine plugged into power,  
stand to the side of the machine, and  
turn it ON.  
To properly care for your wheel, follow  
these tips:  
Always transport, store and handle  
wheels with care. Grinding wheels  
may be damaged if they are dropped  
or if heavy objects are stacked on  
them.  
3. Allow the machine to run for at least  
one full minute to ensure that the  
wheels are safe for use, then move to  
the front of the machine.  
4. Grasp the workpiece tightly and prop-  
erly support it on the appropriate tool  
rest.  
Select the right wheel for the job. DO  
NOT grind or buff material that is not  
designed for the wheel.  
5. Place the workpiece against the front  
surface of the wheel with moderate  
pressure, moving it back and forth in a  
steady, even motion.  
Select the right wheel for the machine.  
A machine that rotates at a higher  
RPM than the wheel rating may cause  
the wheel to break or tear apart.  
Note: Using too much pressure will  
slow the motor and may damage the  
wheel. Using too little pressure will  
make the workpiece bounce around  
and you will not make good contact  
with the wheel.  
Mount the wheels properly. (See the  
Replacing Wheels instructions on  
Page 13 for guidance.) Never use a  
wheel with the wrong arbor size for the  
buffer.  
DO NOT abuse a wheel by jamming  
the workpiece into the wheel with  
excessive force.  
6. After turning the buffer OFF, DO NOT  
continue grinding or buffing and  
DO NOT manually stop either wheel  
with your workpiece!  
Learn how to use the buffer and the  
grinding and buffing wheels properly.  
Ask a trusted person with experience  
or consult with your local library to  
learn more.  
-10-  
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Grinding Wheel  
Dressing  
Buffing Wheel Care  
Dressing restores the grinding wheel with  
a like-new abrasive quality. Whenever the  
front surface of the wheel loses its abra-  
sive 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 15.  
The process of cleaning buffing  
wheels produces airborne dust and  
particles may cause eye injuries or  
respiratory problems. Protect your-  
self by wearing safety glasses and a  
respirator during the entire cleaning  
process.  
Buffing wheels can sometimes become  
caked or clogged with buffing compound,  
reducing their effectiveness. In order to  
clean a buffing wheel, use a commercially-  
available buffing rake, such as those avail-  
able on Page 15.  
To dress the grinding wheel:  
1. With the machine plugged into power,  
stand to the side of the grinding wheel  
turn the machine ON.  
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 clean the buffing wheel:  
1. With the machine plugged into power,  
stand to the side of the grinding wheel  
and turn the machine ON.  
3. Hold the dressing tool firmly on the tool  
rest with both hands and press it lightly  
against the front surface of the grind-  
ing wheel.  
2. Hold the buffing rake firmly on the tool  
rest with both hands and press it lightly  
against the front surface of the buffing  
wheel.  
4. Move the dressing tool in a side-to-  
side motion, while keeping it even with  
the surface of the grinding wheel.  
3. Move the buffing rake in a side-to-side  
motion, while keeping it even with the  
surface of the buffing wheel. As the  
buffing wheel is cleaned, old com-  
pound will be removed and fresh fibers  
exposed.  
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.  
4. Regularly pull the buffing rake away  
from the wheel for visual inspection  
and repeat Steps 3 & 4 until the sur-  
face of the wheel appears to cleaned  
of compound and restored to its origi-  
nal condition and color.  
Model H7757 3" Mini Wool Buffer  
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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.  
Wheel Selection  
The Model H7757 only accepts Type 1 3"  
x 12" wheels with a 14" bore.  
Aluminum oxide and silicon carbide wheels  
are marked in a somewhat uniform manner  
by all major manufacturers. Understanding  
these markings will help you understand  
the capabilities of various wheels. Always  
refer to the manufacturer’s grinding recom-  
mendations when selecting a wheel for  
your project.  
There may be other numbers inserted that  
have meaning for a particular type of wheel.  
Refer to the wheel manufacturer’s technical  
data for a complete explanation.  
Wheel Inspection  
The basic format for wheel numbering  
is:  
Abrasive Grit Grade Bond  
Prefix  
Type  
Size Type Type  
The hazards of using a damaged  
grinding 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!  
Type 1  
A
60  
L
V
The Prefix is the manufacturer’s designa-  
tion for a particular standardized type  
of grinding wheel. Different Type pre-  
fixes indicate different wheel shapes and  
designs. For more information on wheel  
types, ask a person with grinding experi-  
ence or consult your local library.  
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.  
The most common Abrasive Types used  
are A for Aluminum Oxide and C for Silicon  
Carbide, and occasionally SG for Seeded  
Gel.  
First, the wheel should be given 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.  
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.  
Second, the wheel should be given a Ring  
Test. This test will give you an indication of  
any internal damage that may not be obvi-  
ous during a visual inspection.  
Grade Type is an indication of the hard-  
ness of the wheel—“A” being the softest  
and “Z” being the hardest.  
-12-  
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To perform a Ring Test:  
To remove/mount a wheel:  
1.  
2.  
3.  
Make sure the wheel that you test is  
clean and dry; otherwise, you may  
get false results.  
1. DISCONNECT THE MACHINE FROM  
THE POWER SUPPLY!  
2. Remove the three Phillips head screws  
and tooth washers that go through the  
outer guard, and take off the outer  
guard.  
Hang the wheel in the air with a piece  
of cord or string looped through the  
hole in the center.  
At the spots shown in Figure 7,  
gently tap the wheel with a light non-  
metallic device such as the handle of  
a screwdriver or a wooden mallet.  
3. Use a wrench on the nut that holds  
the wheel on the arbor. Hold the wheel  
from turning with your other hand.  
Note: The left end of the arbor has a  
left-handed thread, so loosening the  
nut will require turning it clockwise.  
4. Remove the outer wheel flange and  
paper disc. Pull the wheel free from  
the arbor. There will also be a paper  
disc and a wheel flange on the back  
side of the wheel which should also be  
removed.  
5. Mount the new wheel in the reverse  
order that you removed it or as shown  
in Figure 8. Always make certain there  
are paper or fiber discs between the  
wheel flanges and the wheel itself.  
Tighten the nut snugly but DO NOT  
over-tighten. Over-tightening can crack  
a grinding wheel.  
Figure 7. Ring test tapping locations.  
4.  
5.  
An undamaged wheel will emit a  
clear metallic ring or “ping” sound  
in each of these spots. A damaged  
wheel will respond with a dull thud  
that has no clear tone.  
If you determine from the ring test  
that the wheel is damaged, DO NOT  
use it!  
Paper/Fiber Disc  
Replacing Wheels  
Flange  
Flange  
Wheel  
The wheel guard assembly must be  
removed in order to mount or dismount a  
buffing or grinding wheel.  
Paper/Fiber Disc  
Hex Nut  
Figure 8. Wheel mounting order.  
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-13-  
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NEVER assemble a grinding wheel on  
the arbor without paper or fiber discs  
between the wheel and the flanges.  
Failure to include the paper or fiber  
discs can result in damage to the  
wheel and cause it to fail when at  
speed, causing serious injury!  
6. Re-install the guards and shields.  
7. Run a new wheel for at least one min-  
ute 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.  
-14-  
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SECTION 5: ACCESSORIES  
H5944#0 Wheel Dresser  
G7984—Face Shield  
H5945#1 Wheel Dresser  
H5946#2 Wheel Dresser  
H1298—Dust Sealed Safety Glasses  
H1300—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!  
These wheel dressers expose new grains  
for aggressive cutting on all types of grind-  
ing 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.  
H5946  
H1300  
H1298  
G7984  
H5944  
H5945  
H2347  
H0736  
Figure 10. Our range of Wheel Dressers.  
Figure 9. Our most popular safety  
H4383—Buffing Rake  
H4384—Replacement Rake  
glasses.  
Great for removing dried compound from  
buffing wheels. Simply guide the rake  
across the buffing surface to clean the  
wheel and expose fresh fibers.  
Figure 11. Our Buffing Rake in action.  
Model H7757 3" Mini Wool Buffer  
-15-  
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SECTION 5: MAINTENANCE  
General  
Grinding Wheels  
Always be aware of the condition of your  
machine. Routinely check the condition of  
the following items and repair or replace  
as necessary:  
The grinding wheel should be visually  
inspected before every use. Take care  
when storing grinding wheels to keep them  
free from potential damage due to being  
dropped or having other items dropped  
on them. Store all grinding wheels in a dry  
location. Type 1 grinding wheels should  
be stored vertically with cushioning mate-  
rial between each wheel.  
Damaged or loose grinding wheels.  
Loose mounting bolts or arbor nuts.  
Worn switch.  
If a grinding wheel diameter has been  
reduced to 212", the wheel must be  
replaced. Operating a wheel at anything  
less than this diameter can lead to wheel  
explosion and serious personal injury.  
Worn or damaged cord.  
Worn or damaged support bearings.  
Any other condition that could hamper  
the safe operation of this machine.  
Grinding wheels will require periodic  
dressing. Refer to the Wheel Dressing  
instructions on Page 13 for details on how  
this is done.  
Lubrication  
Buffing Wheels  
Sealed and pre-lubricated ball bearings  
require no additional attention for the life  
of the bearings. All bearings are standard  
sizes, and replacements can be pur-  
chased from our Parts Department or a  
bearing supply store.  
Buffing wheels should be regularly  
cleaned of compounds to maintain their  
effectiveness and surface texture. Wool  
buffing wheels will shed fibers and will  
need to be replaced eventually. If a buff-  
ing wheel is reduced to 212", the wheel  
must be replaced. Operating a wheel at  
anything less than this diameter can tear  
or rip, posing an entangement hazard for  
the workpiece and operator.  
-16-  
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SECTION 6: SERVICE  
Troubleshooting  
Symptom  
Machine slows 1. Workpiece pressure is too 1. Reduce workpiece pressure on  
when operating. great. wheel.  
Machine vibrates 1. Grinding wheel is unbal- 1. Adjust or tighten wheel mounting  
when operating. anced. nut as necessary.  
2. Grinding wheel is damaged. 2. Replace the wheel.  
3. Arbor is bent. 3. Inspect arbor and replace if nec-  
essary.  
4. Bearings are worn or dam- 4. Inspect bearings and replace if  
aged. necessary.  
Wavy condition 1. Workpiece not being held 1. Use a holding device to firmly  
Possible Cause  
Possible Solution  
on surface of  
workpiece.  
firmly.  
2. Wheel face uneven.  
3. Wheel is too hard.  
retain the workpiece.  
2. Dress the grinding wheel.  
3. Use softer wheel.  
Lines on surface 1. Impurity on wheel surface.  
of workpiece.  
1. Dress the grinding wheel.  
2. Workpiece not being held 2. Use a holding device to firmly  
tightly. retain the workpiece.  
Burning spots 1. Workpiece pressure is too 1. Reduce workpiece pressure on  
or cracks in the  
workpiece.  
great.  
wheel.  
2. Improper grinding wheel 2. Try a wheel that is of a softer style  
type.  
or coarser grit.  
3. Coolant required.  
3. Cool the workpiece frequently.  
Wheel  
dulls 1. Workpiece pressure is too 1. Reduce workpiece pressure on  
quickly, grit falls  
off.  
great.  
2. Wheel is too soft.  
wheel.  
2. Select a wheel with a harder  
bond.  
3. Wheel diameter too small.  
4. Bad wheel dress.  
5. Defective wheel bonding.  
3. Replace the wheel.  
4. Dress the wheel.  
5. Consult manufacturer of grinding  
wheel.  
Wheel clogs and 1. Wheel is too hard.  
workpiece shows 2. Feed rate too slow.  
burn marks.  
1. Select a softer wheel bond.  
2. Increase rate of movement of  
workpiece onto wheel.  
3. Bad wheel dress.  
3. Dress the wheel.  
4. Coolant required.  
4. Cool the workpiece frequently.  
Poor buffing per- 1. Buffing wheel is loaded with 1. Clean wheel with a buffing rake as  
formance. compound residue. on Page 11.  
2. Buffing wheel is worn down. 2. Replace buffing wheel.  
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-17-  
Parts Breakdown  
 
 
 
 
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-18-  
Model H7757 3" Mini Wool Buffer  
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Parts List  
REF  
PART #  
DESCRIPTION  
1
PS49M  
PHLP HD SCR M3-.5 X 5  
BASE PLATE  
2
PH7757002  
PH7757003  
PH7757004  
PH7757005  
PH7757006  
PH7757007  
PH7757008  
PS02M  
3
RUBBER FOOT  
4
BASE  
5
MOVEABLE TOOL REST  
WING BOLT M4-.7 X 10  
ROCKER SWITCH  
6
7
8
SWITCH COVER  
9
PHLP HD SCR M4-.7 X 12  
CAPACITOR 3MFD 250VAC  
PHLP HD SCR M4-.7 X 15  
HEX NUT M4-.7  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
PH7757010  
PS21M  
PN04M  
PH7757013  
PH7757014  
PW05M  
CORD & PLUG  
PHLP HD SCR M4-.7 X 86  
FLAT WASHER 4MM  
FLAT WASHER 4MM  
LEFT SAFE GUARD PLATE  
PHLP HD SCR M5-.8 X 12  
FLAT WASHER 5MM  
EYE SHIELD BRACKET  
HEX NUT M5-.8  
PW05M  
PH7757017  
PS08M  
PW02M  
PH7757020  
PN06M  
PLW01M  
LOCK WASHER 5MM  
ARBOR BUSHING  
PH7757023  
PH7757024  
PH7757025  
PH7757026  
PS49M  
LEFT END CAP  
SPECIAL WAVE WASHER 19MM  
BEARING 626Z  
PHLP HD SCR M3-.5 X 5  
EXT TOOTH WASHER 3MM  
STATOR  
PTLW13M  
PH7757029  
PH7757030  
PH7757031  
PH7757032  
PLW02M  
ROTOR  
RIGHT END CAP  
RIGHT SAFE GUARD PLATE  
LOCK WASHER 4MM  
SEAL RING  
PH7757034  
PH7757035  
PN37M  
LEFT SAFE GUARD COVER  
HEX NUT M5-.8 LH  
FLANGE  
PH7757037  
PH7757038  
H8871  
SHAFT SLEEVE  
BUFFING WHEEL 3" X 3/4"  
GRINDING WHEEL 3" X 1/2"  
HEX NUT M5-.8  
H8870  
PN06M  
PH7757042  
PH7757043  
PS38M  
RIGHT SAFE GUARD COVER  
CORD BUSHING  
PHLP HD SCR M4-.7 X 10  
PHLP HD SCR M3-.5 X 5  
PHLP HD SCR M4-.7 X 40  
EYE SHIELD  
PS49M  
PS65M  
PH7757047  
PH7757048  
PH7757049  
PH7757050  
PWR810  
WRENCH 7 X 10  
MACHINE ID LABEL  
MACHINE WARNING LABEL  
WRENCH 8 X 10  
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-19-  
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 particular purpose, are  
hereby limited to the duration of this written warranty. We do not warrant or represent that  
the merchandise complies with the provisions of any law or acts unless the manufacturer so  
warrants. In no event shall Grizzly’s liability under this warranty exceed the purchase price  
paid for the product and any legal actions brought against Grizzly shall be tried in the State  
of Washington, County of Whatcom.  
We shall in no event be liable for death, injuries to persons or property or for incidental,  
contingent, special, or consequential damages arising from the use of our products.  
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 Authorization 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.  
Grizzly Industrial, Inc.  
1203 Lycoming Mall Circle  
Muncy, PA 17756  
Phone: (570) 546-9663  
Fax: (800) 438-5901  
E-Mail:  
Thank you again for your business and continued support. We hope to serve you again  
soon!  
-20-  
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WARRANTY CARD  
Name_________________________________________________________________  
Street_________________________________________________________________  
City _______________________ State_________________________ Zip _________  
Phone #____________________ Email ________________________ Invoice #_____  
Model # ____________________ Order #_______________________ Serial #______  
The following information is given on a voluntary basis. It will be used for marketing purposes to  
help us develop better products and services. All information is strictly confidential.  
1. How did you learn about us?  
____Advertisement  
____Friend  
____Catalog  
____Card Deck  
____Website  
Other:________________________  
2. Which of the following magazines do you subscribe to?  
____ Cabinet Maker  
____ Family Handyman  
____ Hand Loader  
____ Handy  
____ Home Shop Machinist ____ Precision Shooter  
____ Journal of Light Cont. ____ Projects in Metal  
____ Popular Mechanics  
____ Popular Science  
____ Popular Woodworking ____ Wooden Boat  
____ Practical Homeowner ____ Woodshop News  
____ Today’s Homeowner  
____ Wood  
____ Woodsmith  
____ Woodwork  
____ Live Steam  
____ Model Airplane News ____ Rifle  
____ Modeltec  
____ Old House Journal  
____ RC Modeler  
____ Woodworker West  
____ Woodworker’s Journal  
____ Other:  
____ Shop Notes  
____ Shotgun News  
3. What is your annual household income?  
____$20,000-$29,000  
____$30,000-$39,000  
____$40,000-$49,000  
____$70,000+  
____$50,000-$59,000  
____$60,000-$69,000  
4. What is your age group?  
____20-29  
____30-39  
____60-69  
____40-49  
____70+  
____50-59  
5. How long have you been a woodworker/metalworker?  
____0-2 Years ____2-8 Years ____8-20 Years  
____20+ Years  
6. How many of your machines or tools are Grizzly?  
____0-2 ____3-5 ____6-9  
____10+  
____No  
____No  
7. Do you think your machine represents a good value? ____Yes  
8. Would you recommend Grizzly Industrial to a friend? ____Yes  
9. Would you allow us to use your name as a reference for our customers in your area?  
Note: We never use names more than 3 times. ____Yes ____No  
10. Comments:_________________________________________________________  
______________________________________________________________________  
______________________________________________________________________  
______________________________________________________________________  
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Send a Grizzly Catalog to a friend:  
Name________________________________  
Street________________________________  
City______________State______Zip_______  
FOLD ALONG DOTTED LINE  
Place  
Stamp  
Here  
GRIZZLY INDUSTRIAL, INC.  
P.O. BOX 2069  
BELLINGHAM, WA 98227-2069  
TAPE ALONG EDGES--PLEASE DO NOT STAPLE  
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