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Trapped roller freewheels consist of a cylindrical outer race, an inner race with ramps and individually sprung rollers.

The springs ensure that the rollers are held in contact with the outer race and inner race ramp, making torque transmission instantaneous.

A short video showing the operation of Renold Trapped Roller Clutches.

The trapped roller freewheel can be used in 3 applications:

• overrunning
• backstopping
• indexing