Inner rings for needle roller bearings

Inner rings are heat-treated and finished by grinding to a high degree of accuracy and are used for needle roller bearings.

 

In needle roller bearings, the shafts are normally heat-treated and finished by grinding and used as raceway surfaces. However, when it is impossible to make shaft surfaces according to the specified surface hardness or surface roughness, inner rings are used.

 

Inner rings, including those for shell type needle roller bearings (IRT, IRB) and those for general use, are available in a variety of dimensions. When shafts move axially or seals are used adjacent to bearings, wide inner rings can be selected.

 

Inner rings can also be used economically as bushings without any additional machining.