needle roller and cage

Needle rings are single-row or double-row units consisting of cages and needle rollers. Since their radial height corresponds only to the diameter of the needle rollers, needle roller bearings enable bearings with minimal radial space. They are very load-bearing, suitable for high speeds and very easy to assemble.With shape-accurate design of the raceways bearings are achieved with high concentricity.

The radial clearance can be influenced by the type of needle as well as the shaft and housing tolerance. Needle rings presuppose that the raceway on the shaft and in the housing is hardened and ground.