Self-Aligning ball bearings are two raceways in the inner and outer spherical roller between the road, equipped with a spherical ball bearings.
There are cylindrical and tapered bore two structures, cage made of steel sheet, synthetic resin. It features an outer ring raceway spherical shape, with auto-Mind, can compensate for misalignment and shaft deflection caused by the error, but the inner and outer rings relative inclination of not more than 3 degrees.