Grinder Ring Test Results and Failure

The ring test depends on the fact that a crack in the wheel will change the sound emitted when the wheel is tapped lightly. And undamaged wheel will give a clear ringing tone. If there is a crack, there will be a dead sound or thud, and not a clear ring.

Comparison of the sound with other wheels of the same lot and specification will allow rejection of a wheel with a suspiciously different ring.

Failure to ring test could result in a disintegrating wheel, which could lead to serious injury or death.