This self-aligning ball bearing has two rows of balls running on a common spherical raceway in the outer ring, allowing the inner ring with balls and cage to align relative to the outer ring. Bore diameter is 50.0 mm, outside diameter 110.0 mm, width 40.0 mm, net mass 1.64 kg, limiting speed 4000 1/min. The cage is a TVH type made of glass-fibre reinforced plastic, and the bore is a plain cylindrical bore (Z). Radial internal clearance is CN (Group N), the normal clearance group. The design compensates for shaft misalignment and deflection without imposing additional load on the balls, which suits applications where housing and shaft alignment cannot be guaranteed with precision. Both sides are fitted with seals (2RS), keeping grease inside and contaminants out, so the bearing is supplied pre-lubricated and requires no seal replacement over its service life. The plastic cage reduces friction and mass compared to metal cages, supporting smooth operation at the stated limiting speed while the normal internal clearance keeps radial play within standard limits under typical mounting conditions.