Type CSK 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 CSK versions are equipped with "form chromed sprags". This process increases several times the overrunning life time. Torque transmission is ensured by a press fit assembly into a rigid outer housing with N6 tolerance, and onto a shaft with n6 tolerance. The initial bearing radial clearance is set at C5, and is reduced if using the press fit as specified.

Specification
Model Number | UKC 25 ZZ, CSK25P |
---|---|
Precision Rating | P6 |
Material | GCr15 |
Torque (Nm) | 85 |
Weight(kgs) | 0.14 |
Height (mm) | 15 |
Package | single box or as your requirements |
Feature
The CSK series free wheel include CSK ,CSK…P, CSK..PP type. CSK…P has the same construction and outside dimensions as type CSK, but has a keyway on the inner race, The type of PP have a keyway on both inner race and outer race.
Parameter

Model NO. | nominal torque | boundary dimension | limit speed (r/min) | bearing series | inner | Outer ring keyway | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
Tn(N.m) | bore | OD | breadth | bore | outer | ring keyway | (b×t) | ||||
d | L | ring | (b×t) | ||||||||
grease lubrication | oil lubrication | grease lubrication | oil lubrication | ||||||||
CSK12 | 7.4 | 12 | 32 | 10 | 10000 | 11000 | 5500 | 6500 | 6201 | ||
CSK15 | 13.5 | 15 | 35 | 11 | 8400 | 9400 | 5000 | 6000 | 6202 | 5×1.5 | 2×0.6 |
CSK17 | 24.5 | 17 | 40 | 12 | 6300 | 7800 | 4200 | 5200 | 6203 | 5×1.8 | 2×1.0 |
CSK20 | 40 | 20 | 47 | 14 | 6300 | 7800 | 4200 | 5200 | 6204 | 6×2.0 | 3×1.5 |
CSK25 | 68 | 25 | 52 | 15 | 4800 | 5900 | 3400 | 4200 | 6205 | 8×2.0 | 6×2.0 |
CSK30 | 110 | 30 | 62 | 16 | 4000 | 5000 | 2800 | 3500 | 6206 | 10×2.3 | 6×2.0 |
CSK35 | 140 | 35 | 72 | 17 | 3500 | 4000 | 2200 | 2800 | 6207 | 10×2.4 | 8×2.5 |
CSK40 | 260 | 40 | 80 | 22 | 3000 | 3800 | 2000 | 2500 | 12×2.4 | 10×3.0 | |
CSK12 2RS | 7.4 | 12 | 32 | 14 | 10000 | 11000 | 5500 | 6500 | |||
CSK15 2RS | 13.5 | 15 | 35 | 16 | 8400 | 9400 | 5000 | 6000 | 5×1.5 | 2×0.6 | |
CSK17 2RS | 24.5 | 17 | 40 | 17 | 6300 | 7800 | 4200 | 5200 | 5×1.8 | 2×1.0 | |
CSK20 2RS | 40 | 20 | 47 | 19 | 6300 | 7800 | 4200 | 5200 | 6×2.0 | 3×1.5 | |
CSK25 2RS | 68 | 25 | 52 | 20 | 4800 | 5900 | 3400 | 4200 | 8×2.0 | 6×2.0 | |
CSK30 2RS | 110 | 30 | 62 | 21 | 4000 | 5000 | 2800 | 3500 | 10×2.3 | 6×2.0 | |
CSK35 2RS | 140 | 35 | 72 | 22 | 3500 | 4000 | 2200 | 2800 | 10×2.4 | 8×2.5 | |
CSK40 2RS | 260 | 40 | 80 | 27 | 3000 | 3800 | 2000 | 2500 | 12×2.4 | 10×3.0 |