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CSK Series (One-Way Bearing) The CSK model freewheel is a sprag type clutch integrated into a 6200 series ball bearing (except sizes 8 and 40). It provides you with a one way clutch, and eliminates the need for a ball bearing. It gives a high degree of freewheeling accuracy while utilizing a minimum of space.

The CSK model freewheels can be used in backstop, overrunning or indexing applications.