The clutch transfers the force of power, the release bearing guarantees function. The release bearing is the connecting link between the rotating clutch pressure plate for the engine, and the fixed release mechanism on the gearbox side. Nowadays virtually only pressure ball bearings are used to transfer the release forces over to the clutch pressure plate.
Releaser centrally positioned on a toggle
The release bearing balls are set into the circumferential inner ring.
Lower revs increase the longevity of the release bearing.
Releaser with self-centring bearing form
The releasers are designed as self-centring components (radial movement approx. 1.5 mm) to balance unavoidable tolerances between the engine block and the gearbox cover. Initial clutch actions lead to an automatic centralisation on the lip of the membrane spring.
Releaser for pull clutches: