self-aligning ball bearing has two rows of balls and a common concave sphered raceway in the outer ring. self-aligning ball bearing is consequently self-aligning and insensitive to angular misalignments of the shaft relative to the housing. self-aligning ball bearing 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 is Widely used in machinery of mining, power, and textile etc.