This only applies to stone grinding wheels.how do rin test wheels?
Prior to mounting the wheel.
Put something in the center hole that isn't soft like a screw driver, wrench, wooden stick, etc. Then take another similar object and gently knock it once against the side of the wheel. If the wheel has no cracks it will have a nice ring to it. If it is a sour or dull ring then there is a crack in it somewhere, if this is the case destroy the wheel.
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