Sprag Clutches CKK/CSK

Our sprag clutches consist of:

1. A high strength carbon alloy steel precision ground Outer Race.
2. A free rotating Bearing Retainer fitted flush with the Outer Race.
3. Hardened Chrome Alloy Steel Balls to provide concentricity and equal distribution of radial support within the clutch.
4. A precision ground alloy steel Inner Race.
5. A moulded Nylon Sprag Cage to equally space the Sprags.
6. Heavy duty Garter Spring located within the Sprag Cage ensures accurate Sprag engagement.
7. High Carbon Steel profiled Sprags support the compressive loads when the clutch is transmitting torque.
8. Light Retaining End plates attached to the outer race help retain lubricant and protect clutch components from the environment.

Types with suffix RS include a rubber seal in the bore of the retainers to provide a complete sealing of the clutch.Type CSK-RS is constructed with wider races to enable use of a full rubber seal for maximum protection.

Clutch types CKKN and CSKN-RS have keyways on the inner races to enable optional fitting with a key instead of press-fit to the shaft. The outer is still fitted into the housing with a heavy press fit, the bearing clearance being modified to allow for one race only having the heavy press-fit. Clutch types CKKNN have a keyway on the outer race as well as the inner, to allow assembly of the clutches with only a light interference fit. These clutches have the same build as the CKK series, with a high performance sprag assembly combined with a deep groove bearing,to provide a compact, high torque, but low cost freewheel, suitable for both overrun and backstop applications. The lack of press-fit makes them unsuitable for accurate indexing. Clutches with an RS suffix include a rubber seal in the bore of the retainers to provide complete sealing. Type CSKN-RS are constructed with wider races to enable the use of a full rubber seal for best protection.