Almost no torque is transmitted once the limit is reached. At the limit spring loaded balls are forced out of the detentes. It will reset once the torque drops.
SEED Guides Clutches Types < >
5.4 Torque limiting clutchesFriction clutch - controling the actuation (normal) force will control the maximum torque transmitted. Care must be taken with heat generated by the slipping friction surfaces.
Electromagnetic and powder clutches - see Other types of clutch
Ball and Detente clutches.
Almost no torque is transmitted once the limit is reached. At the limit spring loaded balls are forced out of the detentes. It will reset once the torque drops.