Needle roller and cage assemblies are single or double row units comprising cages and needle rollers.
Since their radial section height is equivalent to the diameter of the needle rollers, needle roller and cage assemblies allow bearing arrangements requiring only a very small radial design envelope. They have high load carrying capacity, are suitable for high speeds and are particularly easy to fit.
If the raceways are produced to high geometrical accuracy, bearing arrangements with high runout accuracy can be achieved.
The radial internal clearance can be influenced by the needle roller sort as well as by the shaft and housing tolerances.
Needle roller and cage assemblies require a hardened and ground raceway on the shaft and in the housing.