... clutch. It resembles a roller bearing, but instead of cylindrical rollers, non-revolving asymmetric figure-of-eight shaped sprags are ... wedging action and binding because of friction. The sprags are spring-loaded so that they lock with very little backlash ... Starters, Primary drive, Conveyors, Overrunning, Indexing, Backstopping, Hoist load brake. clutch kit lada,copper clutch,clutch leyland