This self-aligning ball bearing accommodates shaft misalignment through its two rows of balls running on a common spherical raceway in the outer ring. It has a bore diameter of 80.0 mm, outside diameter of 140.0 mm, and width of 33.0 mm, with a net mass of 1.97 kg. The bearing features a tapered bore (K) with a taper ratio of 1:12, allowing mounting directly on a tapered shaft seat without a sleeve. The cage is made of glass-fibre reinforced plastic (TVH), and the limiting speed is 5300 1/min, with a reference speed of 5400 1/min. The C3 radial internal clearance compensates for the interference fit resulting from the tapered bore mounting, maintaining proper operating clearance once the bearing is driven onto the shaft. The self-aligning design allows the bearing to tolerate shaft deflection and angular misalignment between housing and shaft without inducing additional internal stress. The plastic cage reduces friction and mass, supporting smooth operation at the rated speed range. No integral sealing is present, so lubrication and contamination protection must be provided externally.