2018-09-262018-09-262018http://hdl.handle.net/20.500.12091/335The key is a small metal part connecting a rotor/pulley to the shaft of a motor. The key transmits force (torque) between the shaft of a motor and the rotor/pulley. The key prevents relative motion between the shaft of a motor and the rotor/pulley. The key is generally manufactured from mild steel. Keys can be identified by dimensions. Keys are available in a variety of imperial and metric sizes.en-USMotorsArticle