Section R. 408.41962 - Hand-held grinders; safety devicesRule 1962.
(1) A guard on a right angle head or vertical portable grinder shall have the guard located so as to be between the operator and the abrasive wheel during use.(2) A cup wheel on a portable grinder shall be protected by a band-type or revolving cup guard.Mich. Admin. Code R. 408.41962