Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 7 - GUARDS FOR POWER TRANSMISSION
POWER TRANSMISSION EQUIPMENT
Section R. 408.10726 - Pulley condition and operation

(1) A pulley with a defect, including, but not limited to, a crack or a piece broken out, shall not be used.

(2) A pulley subject to active corrosive conditions shall be of corrosion-resisting material.

(3) A pulley permanently out of service shall not be allowed to remain on shafting which is in use, unless enclosed with a guard pursuant to R 408.10751 to R 408.10754.

(4) A pulley shall not be operated at more than its designed rim speed.