Free wheels: Overruning clutches

A free wheel used as overrunning clutch disengages automatically when the driven part rotates faster than the driving part.
Roller type free wheels, when used for overrunning clutch applications must be positioned in such a way that, in the overspeed range, the internal free wheel component is stationary or rotates slowly and the external component overspeeds. This layout ensures a higher number of overspeed rotations, reduces wear and overheating and increases the life of the overrunning clutch free wheel.