1. Self-aligning ball bearings are double row, self-retaining units comprising solid outer rings with a concave raceway, inner rings with a cylindrical or tapered bore and ball and cage assemblies. The bearings are available in open and sealed versions.
2. It has two rows of balls and a common concave sphered raceway in the outer ring.

3. Consequently self-aligning and insensitive to angular misalignments of the shaft relative to the housing.
4. Suitable for applications where considerable shaft deflections or misalignment are to be expected.
5. Has the lowest friction of all rolling bearings.