Wheel Inspection; Wheel Dressing - Grizzly T10875 Owner's Manual

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 you test 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
possible, hang wheel in air with a piece of
cord or string looped through mounting hole
in center.
3. At spots shown in Figure 13, 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 will 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 13. Tapping locations when performing a
ring test.
-18-
STOP
60 Grit
Grade L
Vitrified Bond
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 ring test that grind-
ing wheel is damaged, DO NOT use it!

Wheel Dressing

Depending on the type of grinding you do, the
grinding wheel may require periodic dressing.
There are several different types of wheel dressing
devices available on the market (see Page 25 for
examples). Dressing restores the abrasive quality
of the wheel surface and brings the wheel edge
back to a square form.
Refer to the instructions that accompany your
dressing accessory for complete details on how
to properly dress the wheel.
Always adjust tool rest and spark deflector
after dressing or replacing grinding wheel.
Failure to do so could lead to workpiece
kickback and injury.
Model T10875 (Mfd. Since 01/15)