1. Self-aligning ball bearing has two rows of balls and a common concave sphered raceway in the outer ring. The bearing is consequently self-aligning and insensitive to angular misalignments of the shaft relative to the housing. It is particularly suitable for applications where considerable shaft deflections or misalignment are to be expected. Additionally, the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables it to run cooler even at high speeds.

Self Aligning Ball Bearing (Dia.10-100mm) These bearings come in internal and external types. Internal bearings have an outer-ring ball groove ground to a spherical surface. This surface makes these bearings insensitive to misalignment, but increases raceway contact stresses, which cuts load capacity. Externally self-aligning bearings have a spherical surface on the outside of the outer ring, which matches a concave spherical housing.