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Wheel Inspection &
Ring Test
Do not assume that a grinding wheel is in sound
condition just because it is new or looks okay.
Often damage can occur in shipping, with age,
or with exposure to moisture, and may not be
visible. Inspect every wheel for damage before
installation.
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. If the wheel
does not pass the ring test, DO NOT use the
wheel.
To perform a ring test:
1.
Make sure the wheel you test is clean and dry
to avoid false results.
2.
If size permits, balance wheel with your finger
in center hole, or hang the wheel with a piece
of cord or string looped through bore.
3.
At four spots on wheel shown in Figure 21,
gently tap wheel with a non-metallic object,
such as a wooden mallet.
Figure 21. Tapping locations for a ring test.
-20-
4.
An undamaged wheel will emit a clear metal-
lic ring or "ping" sound in each of the four
spots. A damaged wheel will respond with a
dull thud that has no clear tone.
— If you determine from the results of the
ring test that the wheel is damaged, DO
NOT USE IT!
Installing Grinding
Wheel
During operation, sparks and debris are
thrown from the wheel and chain. To reduce
the risk of operator injury from this material,
ALWAYS make sure the wheel and arbor
safety guards are correctly installed before
connecting the sharpener to power!
Items Needed
Phillips Screwdriver #2 ...................................... 1
To install grinding wheel:
1.
DISCONNECT MACHINE FROM POWER!
2.
Select correct grinding wheel for chain (see
Grinding Wheel Selection on Page 19).
3.
Perform Wheel Inspection & Ring Test. If
wheel does not pass visual inspection or ring
test, DO NOT use it!
Model T28959 (Mfd. Since 2/19)
Qty
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