SKF needle roller and cage assemblies should be guided. The lateral abutment surfaces should be fine turned and polished. Recommendations for surfaces of adjacent machine components that guide needle roller and cage assemblies axially:
- fine turned and polished
- hardened and ground for high-speed operations
- no interruptions
For less demanding applications, snap rings can be used, otherwise use an intermediate ring, e.g. a spring steel washer, to be mounted between the snap ring and the cage assembly.
Appropriate values for the abutment diameters on the shaft and in the housing are listed below.
 |
 |
||
|
Needle roller and cage assembly |
Shaft abutment |
Housing abutment |
|
| Inside diameter | |||
| Fw | da | Da | |
| > | ≤ | ||
| mm | mm | mm | |
| – | 25 | Ew – 0,3 | Fw + 0,4 |
| 25 | 65 | Ew – 0,5 | Fw + 0,5 |
| 65 | – | Ew – 1 | Fw + 1 |
