KKNN One Keyway on inner and the outer.

Type KK is a sprag type freewheel integrated into a 62 series ball bearing (except sizes 8 and 40). It is bearing supported, delivered grease lubricated and protected against dust of more than 0,3 mm. The use of additional “nylos” type seals is recommended especially when the working temperature exceeds 50°C. Oil bath lubrication is also possible.

All the KK versions are equipped with “formchromed” sprags. This process increases several times the overrunning life time. Torque transmission is ensured by a press fit assembly into a rigid steel housing with N6 tolerance, and onto a shaft with n6 tolerance. For this reason, the initial bearing radial clearance is set at C5.


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Code Your Part No Description Price Quantity
KKNN15 Sprag Clutch Key inner/outer 15mm x 35mm x 11mm CSK15PP £123.10 (inc VAT) Each
£102.58 (exc VAT) Each
KKNN25 Sprag Clutch Key inner/outer 25mm x 52mm x 15mm CSK25PP £123.10 (inc VAT) Each
£102.58 (exc VAT) Each