Section 408.10175. Wheel speeds.

(1) An abrasive wheel or its package shall show the maximum operating speed as revolutions per minute. The use of a package  for  this marking shall be limited to those shapes which make marking unfeasible.

(2)   Except as provided for in R 408.10177, an abrasive wheel shall be run at a speed which is not more than that prescribed in table 21 of R 408.10199, but  not more than the rated speed  on  the   wheel.  The revolutions per minute may be increased as the wheel  diameter  decreases   if the original surface feet per minute speed

is not    exceeded.    Wheel     speed shall be computed from the free-running speed of the machine spindle.

(3)   An employer shall purchase and use only an abrasive wheel which has been speed tested, as prescribed in table  22   of  R  408.10199,   by  the manufacturer, with the following exceptions:

(a)   A wheel that is less than 6 inches in diameter.

(b)   A diamond or cubic boron nitride wheel that is bonded by metal or organic substances.

(c)   A segmental disc wheel and disc wheel.

(d)  A ball grinding wheel.

(e)   A regulating wheel for centerless grinders.

(f)  A mounted wheel.

(g)   A segment.

(4)   The operating speed and overhang of a mounted  wheel  shall  be   not more than that prescribed in tables 23 to 31 of R 408.10199   (See  figure 23).

History: 1990 AACS.