Needle roller bearings with machined rings
SKF needle roller bearings with machined rings are made of carbon chromium bearing steel. Relative to their low sectional height, they have a high load carrying capacity. SKF supplies needle roller bearings with machined rings with (fig. 1) or without flanges (fig. 2) on the outer ring, in a wide range of series and sizes. SKF also supplies these bearings with or without an inner ring.
Needle roller bearings with machined inner and outer rings
Needle roller bearings with an inner ring (fig. 2) are used for applications where the shaft cannot be hardened and ground. The permissible axial displacement (→ product table) of the shaft relative to the housing is limited for bearings with an inner ring. If the permissible axial displacement provided by a standard inner ring is insufficient, it is possible to use an extended inner ring (→ Needle roller bearing inner rings).
Needle roller bearings with a machined outer ring, without an inner ring
Needle roller bearings without an inner ring (fig. 1) are an excellent choice for compact bearing arrangements if the shaft can be hardened and ground. Eliminating the need for a separate inner ring enables a larger shaft diameter and a stiffer bearing arrangement. Axial displacement of the shaft relative to the housing is only limited by the width of the raceway on the shaft. By machining the shaft raceways to the appropriate dimensional and geometrical tolerances, it is possible to obtain bearing arrangements with heightened running accuracy. For additional information, refer to Raceways on shafts and in housings.