Grizzly H437 User Manual
SLIMLINE BENCH GRINDER
MODEL H4378/H4379
INSTRUCTION MANUAL
COPYRIGHT © APRIL, 2002 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.
PRINTED IN CHINA.
ONLINE MANUAL DISCLAIMER
THE INFORMATION IN THIS MANUAL REPRESENTS THE CONFIGURATION OF THE MACHINE AS IT IS CURRENTLY BEING SHIPPED. THE
MACHINE CONFIGURATION CAN CHANGE AS PRODUCT IMPROVEMENTS ARE INCORPORATED. IF YOU OWN AN EARLIER VERSION OF THE
MACHINE, THIS MANUAL MAY NOT EXACTLY DEPICT YOUR MACHINE. CONTACT CUSTOMER SERVICE IF YOU HAVE ANY QUESTIONS
ABOUT DIFFERENCES. PREVIOUS VERSIONS ARE NOT AVAILABLE ONLINE.
Model H4378
Model H4379
WARNING
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains
chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement, and other
masonry products.
• Arsenic and chromium from chemically treated
lumber.
Your risk from these exposures varies, depending on
how often you do this type of work. To reduce your
exposure to these chemicals: work in a well ventilated
area, and work with approved safety equipment, such
as those dust masks that are specially designed to filter out microscopic particles.
Table Of Contents
PAGE
1. SAFETY
SAFETY RULES FOR POWER TOOLS ..........................................................2-3
ADDITIONAL SAFETY INSTRUCTIONS FOR GRINDERS ................................4
2. CIRCUIT REQUIREMENTS
110V OPERATION ..............................................................................................5
EXTENSION CORDS ..........................................................................................5
GROUNDING ......................................................................................................5
3. INTRODUCTION
COMMENTARY....................................................................................................6
4. ASSEMBLY
UNPACKING ........................................................................................................7
PIECE INVENTORY ............................................................................................7
MOUNTING ..........................................................................................................8
TOOL RESTS ......................................................................................................8
EYE SHIELDS......................................................................................................8
5. OPERATIONS
TEST RUN............................................................................................................9
SAFE GRINDING ..............................................................................................10
WHEEL CARE....................................................................................................10
WHEEL SELECTION ........................................................................................11
WHEEL INSPECTION........................................................................................12
WHEEL MOUNTING ..........................................................................................13
6. MAINTENANCE
GENERAL ..........................................................................................................14
LUBRICATION ..................................................................................................14
GRINDING WHEELS ........................................................................................14
MAINTENANCE NOTES....................................................................................15
7. CLOSURE................................................................................................................16
TROUBLESHOOTING ......................................................................................................17
MACHINE DATA ..........................................................................................................18-19
PARTS BREAKDOWN AND PARTS LIST..................................................................20-21
WARRANTY AND RETURNS ..........................................................................................22
-2- H4378/H4379 Slimline Bench Grinder
SECTION 1: SAFETY
For Your Own Safety Read Instruction
Manual Before Operating This Equipment
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 equipment.
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.
NOTICE
Safety Instructions For Power Tools
5. KEEP CHILDREN AND VISITORS
AWAY. All children and visitors should be
kept at a safe distance from work area.
6. MAKE WORKSHOP CHILD PROOF with
padlocks, master switches, or by removing
starter keys.
7. DO NOT FORCE TOOL. It will do the job
better and safer at the rate for which it was
designed.
8. USE RIGHT TOOL. Do not force tool or
attachment to do a job for which it was not
designed.
1. KEEP GUARDS IN PLACE and in working
order.
2. REMOVE ADJUSTING KEYS AND
WRENCHES. Form habit of checking to
see that keys and adjusting wrenches are
removed from tool before turning on.
3. KEEP WORK AREA CLEAN. Cluttered
areas and benches invite accidents.
4. DO NOT USE IN DANGEROUS ENVIRONMENT. Do not use power tools in
damp or wet locations, or where any flammable or noxious fumes may exist. Keep
work area well lighted.
H4378/H4379 Slimline Bench Grinder -3-
9. USE PROPER EXTENSION CORD. Make
sure your extension cord is in good condition. Conductor size should be in accordance with the chart below. The amperage
rating should be listed on the motor or tool
nameplate. An undersized cord will cause
a drop in line voltage resulting in loss of
power and overheating. Your extension
cord must also contain a ground wire and
plug pin. Always repair or replace extension cords if they become damaged.
Minimum Gauge for Extension Cords
10. WEAR PROPER APPAREL. Do not wear
loose clothing, gloves, neckties, rings,
bracelets, or other jewelry which may get
caught in moving parts. Non-slip footwear
is recommended. Wear protective hair covering to contain long hair.
11. ALWAYS USE SAFETY GLASSES. Also
use face or dust mask if cutting operation is
dusty. Everyday eyeglasses only have impact
resistant lenses, they are NOT safety glasses.
12. SECURE WORK. Use clamps or a vise to hold
work when practical. It is safer than using your
hand and frees both hands to operate tool.
13. DO NOT OVER-REACH. Keep proper
footing and balance at all times.
14. MAINTAIN TOOLS WITH CARE. Keep
tools sharp and clean for best and safest
performance. Follow instructions for lubricating and changing accessories.
15. USE RECOMMENDED ACCESSORIES.
Consult the owner’s manual for recommended accessories. The use of improper
accessories may cause risk of injury.
LENGTH
AMP RATING 25ft 50ft 100ft
0-6 18 16 16
7-10 18 16 14
11-12 16 16 14
13-16 14 12 12
17-20 12 12 10
21-30 10 10 No
Safety Instructions For Power Tools
16. REDUCE THE RISK OF UNINTENTIONAL STARTING. On machines with magnet-
ic contact starting switches there is a risk of
starting if the machine is bumped or jarred.
Always disconnect from power source
before adjusting or servicing. Make sure
switch is in OFF position before reconnecting.
17. MANY WOODWORKING TOOLS CAN
“KICKBACK” THE WORKPIECE toward the
operator if not handled properly. Know what
conditions can create “kickback” and know
how to avoid them. Read the manual accompanying the machine thoroughly.
18. CHECK DAMAGED PARTS. Before fur-
ther use of the tool, a guard or other part
that is damaged should be carefully
checked to determine that it will operate
properly and perform its intended function.
Check for alignment of moving parts, binding of moving parts, breakage of parts,
mounting, and any other conditions that
may affect its operation. A guard or other
part that is damaged should be properly
repaired or replaced.
19. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Do not
leave tool until it comes to a complete stop.
20. NEVER OPERATE A MACHINE WHEN
TIRED, OR UNDER THE INFLUENCE OF
DRUGS OR ALCOHOL. Full mental alert-
ness is required at all times when running a
machine.
21. NEVER ALLOW UNSUPERVISED OR
UNTRAINED PERSONNEL TO OPERATE THE MACHINE. Make sure any
instructions you give in regards to machine
operation are approved, correct, safe, and
clearly understood.
22. IF AT ANY TIME YOU ARE EXPERIENCING DIFFICULTIES performing the intend-
ed operation, stop using the machine! Then
contact our service department or ask a
qualified expert how the operation should
be performed.
-4- H4378/H4379 Slimline Bench Grinder
Additional Safety Instructions For Grinders
1. ALWAYS WEAR EYE PROTECTION!
2. MAKE SURE GRINDER IS SECURED
FIRMLY TO A BENCH OR STAND
BEFORE USE. Any “wobbles” must be
corrected by shimming or blocking before
operation.
3. BEFORE MOUNTING A NEW WHEEL,
BE SURE WHEEL RPM IS RATED AT
AN EQUAL OR HIGHER RPM THAN
THE GRINDER.
4. DO NOT GRIND ON THE SIDES OF
THE GRINDING WHEELS, unless they
are special wheels designed specifically
for this purpose.
5. ONLY USE FLANGES THAT ARE
INCLUDED WITH THE GRINDER.
6. WEAR AN APPROVED DUST MASK
OR RESPIRATOR. Grinding operations
produce dust.
7. REPLACE A CRACKED WHEEL IMMEDIATELY. DO NOT use a grinding wheel
that has cracks or flaws. Before using,
inspect each wheel. Handle wheels carefully to avoid bumping or dropping.
8. DO NOT stand directly in front of grinding
wheels when turning machine on.
9. PERFORM a “ring test” (see page 12) on
grinding wheels to ensure that they are
safe for use. Always inspect grinding
wheels before operation.
10. HOLD THE WORKPIECE FIRMLY
WHILE GRINDING.
11. DO NOT allow your hands to come into
contact with grinding wheels during operation. Abrasive accessories have the
ability to remove a lot of material, including skin, very quickly. However, do not
wear gloves while grinding, they may get
caught in the grinding wheel.
12. KEEP TOOL REST AS CLOSE AS
POSSIBLE TO GRINDING WHEEL.
13. NEVER GRIND BY PLACING THE
WORKPIECE ON TOP OF THE
WHEEL. The wheel may kick the work-
piece toward the operator. Always grind
on the downward part of the wheel.
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 follow guidelines could
result in serious personal injury, damage to
equipment or poor work results.
To operate this or any power tool safely and
efficiently, become as familiar with it as
possible. The time you invest before you
begin to use your Model H4378/H4379 will
be time well spent. DO NOT operate this
machine until you are completely familiar
with the contents of this manual, or serious
personal injury may occur.
H4378/H4379 Slimline Bench Grinder -5-
110V Operation
SECTION 2: CIRCUIT REQUIREMENTS
If you find it necessary to use an extension cord
with the Model H4378/H4379, make sure the cord
is rated Hard Service (grade S) or better. Refer to
the chart in the standard safety instructions to
determine the minimum gauge for the extension
cord. The extension cord must also contain a
ground wire and plug pin. Always repair or replace
extension cords when they become worn or damaged.
Extension Cords
Grounding
This equipment must be
grounded. Verify that any
existing electrical outlet
and circuit you intend to
plug into is actually
grounded. Under no circumstances should the
grounding pin from any
three-pronged plug be
removed. Serious injury
may occur.
In the event of an electrical short, grounding
reduces the risk of electric shock by providing
electric current a path of least resistance. This
tool is equipped with a power cord having an
equipment-grounding conductor. See Figure 1B.
The outlet must be properly installed and grounded in accordance with all local codes and ordinances.
The Model H4378 is wired for 110V and will draw
2.5 amps. The Model H4379 is wired for 110V and
will draw 3.5 amps. If you operate this machine on
any circuit that is already close to its capacity, it
might blow a fuse or trip a circuit breaker.
However, if an unusual load does not exist and a
power failure still occurs, contact a qualified electrician or our service department.
A 10 amp dedicated circuit should be used with
this grinder. Always check to see if your current
wires are capable of handling a 10 amp load. If
you are unsure, consult the advice of a qualified
electrician.
Figure 1B. Typical 110V plug and outlet.
Figure 1A. Do not remove grounding pin.
-6- H4378/H4379 Slimline Bench Grinder
SECTION 3: INTRODUCTION
We are proud to offer the Grizzly Model
H4378/H4379 Slimline Bench Grinder. The Model
H4378/H4379 is part of a growing Grizzly family of
fine woodworking machinery. When used according to the guidelines set forth in this manual, you
can expect years of trouble-free, enjoyable operation and proof of Grizzly’s commitment to customer satisfaction.
The Model H4378 offers a
1
⁄3 HP, 3450 RPM
motor and a 6" grinding wheel. The Model H4379
offers a
1
⁄2 H.P., 3450 RPM motor and an 8" grind-
ing wheel.
A number of grinding wheels for the Model
H4378/H4379 are available through the Grizzly
catalog.
We are also pleased to provide this manual with
the Model H4378/H4379. It was written to guide
you through assembly, review safety considerations, and cover general operating procedures.
This manual represents our effort to produce the
best documentation possible. If you have any
comments regarding this manual, please write to
us at the address below:
Grizzly Industrial, Inc.
C
/O Technical Documentation
P.O. Box 2069
Bellingham, WA 98227-2069
Most importantly, 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
E-Mail: techsupport@grizzly.com
Web Site: http://www.grizzly.com
The specifications, drawings, and photographs
illustrated in this manual represent the Model
H4378/H4379 as supplied when the manual was
prepared. However, owing to Grizzly’s policy of
continuous improvement, changes may be made
at any time with no obligation on the part of
Grizzly. Whenever possible, though, we send
manual updates to all owners of a particular tool
or machine. Should you receive one, we urge you
to insert the new information with the old and keep
it for reference.
Commentary
Read the manual before
assembly and operation. Become familiar
with the machine and its
operation before beginning any work. Serious
personal injury may
result if safety or operational information is not
understood or followed.
H4378/H4379 Slimline Bench Grinder -7-
SECTION 4: ASSEMBLY
Unpacking
The Model H4378/H4379 is shipped from the
manufacturer in a carefully packed carton. If you
discover the machine is damaged after you have
signed for delivery, immediately call Customer
Service for advice.
When you are completely satisfied with the condition of your shipment, you should inventory its
parts.
Some metal parts may
have sharp edges on
them after they are
formed. Please examine
the edges of all metal
parts before handling
them. Failure to do so
could result in injury.
Piece Inventory
NOTICE
A full parts list and breakdown can be found
toward the end of this manual. For easier
assembly, or to identify specific parts, please
refer to the detailed illustrations at the end of
the manual.
After all the parts have been removed from the
carton, you should have:
• Grinder
• Bolts (4)
• Washers (6)
• Knobs (2)
• Adjustable Rests (2)
• Eye Shields (2)
• Spark Breakers (2)
• Cooling Tray
NOTICE
When mounted, the cooling tray can be easily damaged if the grinder is tipped forward.
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