This self-aligning ball bearing compensates for shaft misalignment and deflection through its spherical outer ring raceway, allowing the two rows of balls to adjust angularly relative to the housing bore. The bearing has a tapered bore with a taper of 1:12 (designation K), a bore diameter of 50.0 mm, outside diameter of 90.0 mm, and width of 20.0 mm, with a net mass of 0.51 kg. The cage is made of glass-fibre reinforced plastic (TVH), and the radial internal clearance corresponds to C3 (Group 3), which is greater than standard clearance. Limiting speed is 8700 1/min, with a reference speed of 7700 1/min. The tapered bore allows mounting on tapered shaft seats or with an adapter sleeve, simplifying installation and enabling precise control of the fitted internal clearance during assembly. The C3 clearance accommodates temperature-related expansion and interference fits without eliminating the ability to self-align, while the plastic cage supports smooth ball guidance at the given speed ratings. As an open bearing, it requires external sealing and lubrication suited to the operating conditions, with the self-aligning design tolerating shaft deflection and housing misalignment without added edge loading on the balls.