Section 408.10113. Inspection of abrasive wheels.

(1) At time of unpacking, an abrasive wheel   shall    be    inspected for damage.

(2)   Prior to mounting, a vitrified or silicate wheel more than 4 inches in diameter shall be given a ring test by being tapped by a nonmetallic tool such as a handle of a screwdriver for a light wheel or a wooden  mallet for a heavy wheel. The ring test shall be conducted as follows:

(a)   Wheels must be dry and free from  sawdust   when   applying     the     ring test, otherwise the sound will be deadened.

(b)   Tap wheels about 45 degrees each side of the    vertical   center   line and about 1 or 2 inches from the periphery as indicated by   the   spots   in the figures below.

(c)   Then rotate the wheel 45 degrees and repeat the test.

(d)   A sound and undamaged wheel will give  a   clear   metallic      tone.     If cracked, there will be a dead sound and not a clear "ring."

History: 1979 AC.