As a supplier, DAC Self-aligning ball bearings, the same as other companies, have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. They are available open or sealed. The bearings are insensitive to angular misalignment of the shaft relative to the housing, which can be caused, for example, by shaft deflection.
· Accommodate static and dynamic misalignment
· Excellent high-speed performance
· Minimum maintenance
· Low friction
· Excellent light load performance
· Low noise
Welcome to contact DAC to know more and then to be your best bearing supplier!
http://www.dacbearing.com/products/Self-Aligning-Ball-Bearing/141.html