This listing is for 2 piece/s.A spherical roller bearing is a rolling-element bearing that permits rotation with low friction, and permits angular misalignment. Typically these bearings support a rotating shaft in the bore of the inner ring that may be misaligned in respect to the outer ring. The misalignment is possible due to the spherical internal shape of the outer ring and spherical rollers. Spherical roller bearings are not truly spherical in shape. The rolling elements of spherical roller bearings are mainly cylindrical in shape, but have a profile that makes them appear like cylinders that have been slightly over-inflated. Construction Spherical roller bearings consist of an inner ring with two raceways inclined at an angle to the bearing axis, an outer ring with a common spherical raceway, spherical rollers, cages and, in certain designs, also internal guide rings or centre rings. The bearings can also be sealed. Applications Gearboxes Pumps Wind Turbines Material Handling Mining and construction equipment Benefits Accommodate misalignment High load carrying capacity Long service life Low friction Robust Specifications Inner diameter (mm): 4 Outer diameter (mm): 12 Width (mm): 5 Maintenance free: No Sliding contact surface: Steel on steel