Angular contact spherical plain bearings. The sliding contact surfaces of these bearings are spherical in shape and inclined at an angle to the bearing axis, and consequently these bearings are well suited for accommodating combined (radial and axial) loads. 

Radial spherical plain bearings have an inner ring with a sphered convex outside diameter and an outer ring with a correspondingly sphered but concave inside surface.Radial Spherical Plain Bearings. Timken’s spherical plain bearings (SPBs), or bushings, are metal-on-metal bearings consisting of a spherically ground inner ring housed in a mating outer ring without any rolling elements.Spherical plain bearings, which are also known as spherical plane bearings, have two rings - an inner ring with a sphere convex outside surface and an outer ring with a matching sphere, but concave inside surface. Spherical Plain Bearings, SPBs, spherical plain bearing manufacturer, self-lubricated spherical plain bearings.