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Wheel Care
When grinding, your safety depends, to a large
degree, on the condition of the wheel. A wheel in
poor condition presents the possibility of breaking
apart during rotation and injuring the operator and
others in the area.
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 inappropriate for the
wheel type.
•
Only use wheels that are rated for the RPM
of the tool grinder.
•
Mount the wheel properly (see Wheel
Removal & Installation on Page 20).
•
Do not push the tooling into the grinding
wheel with such force that it causes the grind-
er to bog down. And do not apply pressure to
stop the wheel after turning the grinder OFF.
•
Dress the wheel when necessary. Do not allow
it to become glazed (see Wheel Dressing on
Page 20).
•
Do not store wheels in damp or wet locations.
•
Do not overtighten the nut when mounting the
wheel.
Model T28523 (Mfd. Since 05/19)
Wheel Inspection
Before mounting a new grinding wheel, it must be
inspected. Do not assume that a wheel is in sound
condition just because it is new—often damage
can occur in shipping, with age, or with exposure
to moisture.
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.
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.
To perform ring test:
1.
Make sure grinding wheel is clean and dry;
otherwise, you may get false results.
2.
If size permits, balance grinding wheel with a
screw driver through mounting hole. If this is
not possible, hang wheel in air with a piece of
cord or string looped through mounting hole
in center.
3.
At spots shown in Figure 18, gently tap grind-
ing wheel with a light non-metallic device
such as handle of a screwdriver or a wooden
mallet.
Note: Finding exact spot to tap may take sev-
eral attempts.
STOP
Rated 3500 RPM
Make sure your grinder is not
faster than the rated RPM of this wheel
Type-1
Aluminum
Oxide
WARNING
Grinding can be dangerous
Visually inspect this wheel
for cracks, nicks,chips
Figure 18. Tapping locations when performing a
ring test.
60 Grit
Grade L
Vitrified Bond
-19-
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