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
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 a Ring Test:
1.Make sure the wheel that you test is clean and dry; otherwise, you may get false results.
2.If size permits, balance the wheel with your finger in the hole. If this is not possible, hang the wheel in the air with a piece of cord or string looped through the hole in the center.
3.At the spots shown in Figure 5, gently tap the wheel with a light
Note: Finding the exact spot to tap will take several attempts.
4.An undamaged wheel will emit a clear metal- lic ring or “ping” sound in each of these spots. A damaged wheel will respond with a dull thud that has no clear tone.
5.If you determine from the ring test that the 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 dress- ing devices available on the market (see Page 17). 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 a wheel.
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Figure 5. Tapping locations when performing a
ring test.
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