• NRB Bearings Limited

Cylindrical Roller Bearings

NRB Bearings Ltd manufactures cylindrical roller bearings. They are most suitable for high radial loads and capable of operating at high speeds. Thermal expansion of shaft in axial direction is best taken care of by using a cylindrical roller bearing with plain inner ring (NU) or plain outer ring (N). Cage and roller assembly with two ribbed rings (either the inner or outer) is separable from the other ring and thus can be mounted independently. This feature simplifies the mounting of a cylindrical roller bearing when interference fit is to be considered for both the inner and outer rings. The various types of roller bearings differ by the rib arrangement. The common types are: NU: does not provide axial location to the shaft; NJ: shaft axial location in one direction; NUP: shaft axial location in both directions; and N: does not provide axial location to the shaft. NRB's standard cylindrical roller bearings are manufactured according to the normal tolerance class of ISO 492.