Section 408.10174. Grinding machine spindle speeds.

(1) The  spindle  speed   shall  be  permanently     marked     on    a grinding machine and maintained in a legible manner.

(2)   The spindle speed shall not exceed the rated speed of  the  grinding wheel.

(3)   The wheel spindle speed on a single-speed grinding  machine  shall   be checked with a tachometer when a change is made  which   could   affect   the spindle speed.

(4)   The wheel spindle speed on an air-driven grinder     shall     be     checked with a tachometer as follows:

(a)   After maintenance or repair.

(b)   When in use, with such checks being performed as often as  necessary to assure that wheel overspeed will not occur.

(5)   The wheel spindle speed of a vari-speed grinding    machine     shall    be checked with a tachometer as follows:

(a)   When in use, with such checks being performed as often as  necessary to assure that wheel overspeed shall not occur.

(b)   After any change that could affect the spindle speed.

(c)   When a new wheel is mounted.

History: 1990 AACS.