ISB combined needle roller bearings (series NX, NKX and NKXR) are supplied without inner ring insofar as the shaft is used as a raceway. The shaft must be ground and hardened to ensure compatibility with the hardness of the rollers.
The outer ring of the bearing in the NX series is fitted with a groove in which an elastic ring can be mounted, which has the specific task of blocking the bearing in the event it has to support an axial load.
SPECIAL TECHINCAL FEATURES
If the ISB combined needle roller bearing has to support two-way axial loads, it is recommended to mount two counterpoised bearings from the same series.
NBS combined bearings can be used in different applications, for example:
* machine tools;
* wire-hooding machines;
* capping machines;