Section R. 408.11115 - GuardsRule 1115.
(1) A polishing, buffing, or wire brush wheel on a hand jack, automatic machine, or coated abrasive machine shall have guards made of a minimum of 16 gauge metal or equivalent and of a size and design to cover at least half of the sides of the working wheel, and extend at least 1 inch beyond the spindles. See figure 2.(2) An adjustable deflector of at least 16 gauge metal or equal material shall be installed and maintained within 1/4 inch of the face of the wheel on all open spindle lathes. See figure 2.(3) The face opening shall not be any greater in area than actually required for performance of the operation.(4) In-running nip points of drive and idler rolls, such as found in belt sanding, shall be guarded with an enclosure which will include the rolls. Click Here To View Image
Mich. Admin. Code R. 408.11115