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-10- H4378/H4379 Slimline Bench Grinder
Safe Grinding Wheel Care
Your safety when grinding depends, on a 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.
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.
• Select the right grinding wheel for the job. Do
not grind material that is not designed for the
wheel.
• Select the right machine for the wheel. A
machine that rotates at a higher RPM than
the wheel is rated for may cause the wheel to
fly apart.
•Mount the wheels properly. (See the “Wheel
Mounting” instructions on page 13 for guid-
ance.) Never use a wheel with the wrong
arbor size for the grinder.
• Do not abuse the wheel by jamming the work
into the grinding wheel with excessive force.
• Learn how to use the grinder and the grinding
wheels properly. Ask a trusted person with
experience or consult with your local library to
learn more.
• If using coolant, always spin it out of the
wheel before turning off the power.
• Grinding on side of the wheel may cause
wheel damage.
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.
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 flam-
mable liquids or gases.
• Maintain proper care of your wheels. Read
the “Wheel Care” instructions for ideas on
how to go about doing this.
• Wear the proper protective clothing.
Remember that particles flying off of a grind-
ing wheel will be traveling very fast—prepare
for this. Wear safety glasses, a dust mask,
earplugs, a leather apron, arm guards, a
hardhat and heavy leather boots.
• Grasp the workpiece tight and properly sup-
port it on the tool rest during operation. DO
NOT lean into the workpiece in a manner that
may cause your hands to move into the spin-
ning wheel if the workpiece slips off.
• Concentrate on the task at hand. STOP
grinding if other people are distracting you.
STOP grinding if your mind is on something
else.
•DONOT grind on the side of the wheel.
Although side grinding is permissible for
some wheel types, the Model H4378/H4379
is not designed for side grinding.