This type of ball bearing is recommended when alignment of the shaft and housing is difficult and the shaft may flex. The outer ring has a spherical raceway and its center of curvature  coincides  with that of the bearing; therefore, the axis of the inner ring, balls and cage can deflect to some  extent around the bearing center. Pressed steel cages are usually used. Since the contact angle > >is small, the axial load capacity is low. The permissible  dynamic  misalignment is approximately  0.07 to 0.12 radian (4 to 7 degrees) under normal  loads.

However, depending on the surrounding structure, such an angle may not be possible.