Spherical roller bearings consist of and outer ring having a contnous spherical raceway within which operates two rows of barrel-shaped rollers which are turn guided by an inner ring with two raceways seperated by a center rib. This bearing has self-aligning properties, and therefore is suited for use where misalignment between the inner and outer rings occurs from causing installation error or shaft flexure.

Spherical roller bearings have large capacity for radial loads, axial loads in either direction, and complex loads. They are also suited for applications where vibration and stock loads are encountered. When operating under axial loads, however, it is desirable to maintain conditions so that Fa/Fr≤2ein order to prevent sliding movement along the row of rollers not receiving the axial load.

In addition to standard type there are various other types of spherical roller bearings. Among these, Type E has a particular high load capacity.

In addition to bearings with cylindrical bore, those with tapered bore are also avaible. Bearings with tapered bore are specified by attaching the suffix"K" to the end of the bearings basic number. Most tapered bore bearings incorporate the use of adapters and withdrawal sleeves for shaft mounting. The bearings can take great radial load, suitable for heavy machinery used in mining, metallurgical, paper-making and construction, etc.