self aligning ball bearings

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Brda notes that similar to deep groove?ball bearings, most?self-aligning ball?are for general use.

Self-aligning ball bearings?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 (fig. 1), which can be caused, for example, by shaft deflection.