Section R. 408.16360 - Pulp grinding and shreddingRule 6360.
(1) A pulp grinder having a water wheel shall be equipped with a governor to limit the peripheral speed of the grinder to its rated speed.(2) The cutting heads of a pulp shredder shall be enclosed, except for an opening to permit only the entry of stock. The enclosure shall be made of solid material or mesh with openings not more than 1/2 inch. The shredder shall be fed from a table extending not less than 36 inches from the opening, or an automatic feeding device shall be used. The enclosure shall be bolted or locked in place.(3) Doors of pocket grinders shall be arranged so as to keep them from closing accidentally.Mich. Admin. Code R. 408.16360