CSK20 CSK30 CSK35 KK20 KK30 KK35 CSK 2RS One Way Sprag Clutch Bearing Freewheel
CSK(CSK...2RS) One Way Sprag Type Freewheel Clutch
Production introduction
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 “formchromed” 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.
Please contact us when either the ambient or the operating temperature is not within the range +5°C to +60°C. CSK..2RS is 5 mm wider but is equiped with lip seals to be water splash resistant.
Products Parameters
| Type | Size | Bearing series | Bearing loads | Weight | Drag torque | |||||
| dynamic | static | |||||||||
| CSK(KK) | d | TKN1) | N max | D | L | C | C0 | TR | ||
| [mm] | [Nm] | [min-1] | [mm] | [mm] | [kN] | [kN] | [kg] | [Ncm] | ||
| 8* | – | 2.5 | 15000 | 22 | 9 | 3.28 | 0.86 | 0.015 | 0.5 | |
| 12 | 6201 | 9.3 | 10000 | 32 | 10 | 6.1 | 2.77 | 0.04 | 0.7 | |
| 15 | 6202 | 17 | 8400 | 35 | 11 | 7.4 | 3.42 | 0.06 | 0.9 | |
| 17 | 6203 | 30 | 7350 | 40 | 12 | 7.9 | 3.8 | 0.07 | 1.1 | |
| 20 | 6204 | 50 | 6000 | 47 | 14 | 9.4 | 4.46 | 0.11 | 1.3 | |
| 25 | 6205 | 85 | 5200 | 52 | 15 | 10.7 | 5.46 | 0.14 | 2 | |
| 30 | 6206 | 138 | 4200 | 62 | 16 | 11.7 | 6.45 | 0.21 | 4.4 | |
| 35 | 6207 | 175 | 3600 | 72 | 17 | 12.6 | 7.28 | 0.3 | 5.8 | |
| 40 | – | 325 | 3000 | 80 | 22 | 15.54 | 12.25 | 0.5 | 7 | |
| CSK..2RS | 8** | 2.5 | 15000 | 22 | 9 | 3.28 | 0.86 | 0.015 | 0.8 | |
| 12 | – | 9.3 | 10000 | 32 | 14 | 6.1 | 2.77 | 0.05 | 3 | |
| 15 | 17 | 8400 | 35 | 16 | 7.4 | 3.42 | 0.07 | 4 | ||
| 17 | 30 | 7350 | 40 | 17 | 7.9 | 3.8 | 0.09 | 5.6 | ||
| 20 | 50 | 6000 | 47 | 19 | 9.4 | 4.46 | 0.145 | 6 | ||
| 25 | 85 | 5200 | 52 | 20 | 10.7 | 5.46 | 0.175 | 6 | ||
| 30 | 138 | 4200 | 62 | 21 | 11.7 | 6.45 | 0.27 | 7.5 | ||
| 35 | 175 | 3600 | 72 | 22 | 12.6 | 7.28 | 0.4 | 8.2 | ||
| 40 | – | 325 | 3000 | 80 | 27 | 15.54 | 12.25 | 0.6 | 10 | |
Note:
1) T max = 2 × T KN
*) One Z seal on the bearing side only. Looking from this side, the outer race runs free in the counterclockwise direction
**) Only one RS seal on the ball bearing side looking from this side, the outer race runs free in the counterclock-wise direction
Mounting example:
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