DOUBLE ROW SELF-ALIGNING BALL BEARINGS utilize an inner ring with two rows of balls, in two deep raceways; and an outer ring with a single spherical raceway. In this way, the inner and outer rings can be misaligned relative to each other. The resulting affect is a comparatively large angle imposing moment loads upon the balls.
The boundary dimensions of the 1200 and 1300 series are the same as the 6200 and 6300 single row deep groove...