Section R. 408.10114 - Work restsRule 114.
(1) An off hand grinder shall be equipped with either a work rest so located that the point of grinding is on a horizontal plane with the wheel spindle, or a device which shall prevent the work piece from jamming between the abrasive wheel and the wheel guard. Where a work rest or device is used at a height other than the horizontal plane with the spindle, a warning sign shall be installed to prohibit use of the grinder for other than the job for which the work rest or device was set.(2) A work rest shall be adjusted and maintained to within 1/8 inch of the abrasive wheel. The adjustment shall be accomplished when the abrasive wheel is at rest.(3) A work rest shall be designed and constructed of metal capable of supporting the work piece.Mich. Admin. Code R. 408.10114