-18-
Model W1871 (For Machines Mfd. Since 05/19)
O
PE
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ATIO
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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, do these steps:
1. Make sure grinding wheel is clean and dry;
otherwise, you may get false results.
2. Hang wheel in air with a piece of cord or string
looped through mounting hole in center.
3. At spots shown in Figure 14, gently tap grinding
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 several
attempts.
4. An undamaged grinding wheel will emit a clear
metallic ring or "ping" sound in each of these spots.
A damaged grinding wheel will respond with a dull
thud that has no clear tone.
— If you determine from the ring test that a grinding
wheel is damaged, DO NOT use it!
Figure 14. Tapping locations when
performing a ring test.
STOP
Rated 3500 RPM
Make sure your grinder is not
faster than the rated RPM of this wheel
WARNING
Grinding can be dangerous
Visually inspect this wheel
for cracks, nicks,chips
Type-1
Aluminum
Oxide
60 Grit
Grade L
Vitrified Bond
Warped wheel flanges can increase
risk of grinding wheel breaking and
flying apart. Never use warped wheel
flanges. Always check flanges for flat-
ness before installing grinding wheel.
Summary of Contents for W1871
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