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Caring for
Grinding Wheel
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.
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 grinder.
Mount the wheel properly (see Installing/
•
Removing Grinding Wheel on Page 24).
•
DO NOT push the workpiece into the grind-
ing wheel with such force that it causes the
grinder to bog down. DO NOT apply pressure
to stop wheel after turning grinder OFF.
•
Dress the wheel when necessary. Do not
allow it to become glazed (see Dressing
Grinding Wheel on Page 24).
•
DO NOT store wheels in damp or wet loca-
tions.
•
DO NOT overtighten the nut when mounting
the wheel.
•
DO NOT leave the wheel mounted when
machine is not in use.
Model T32251/T32252 (Mfd. Since 08/20)
Inspecting
Grinding Wheel
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 tested is clean and
dry; otherwise, you may get false results.
2.
If size permits, balance grinding wheel with
your finger in mounting hole. If this is not pos-
sible, hang wheel in air with a piece of cord or
string looped through mounting hole.
3.
At spots shown in Figure 22, 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.
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 22. Tapping locations when performing a
ring test.
STOP
60 Grit
Grade L
Vitrified Bond
-23-
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