This self-aligning ball bearing compensates for shaft misalignment and deflection thanks to its spherical outer raceway. It features a tapered bore with a 1:12 taper (K), a solid brass cage (M), and C3 radial internal clearance. Bore diameter is 80.0 mm, outside diameter 170.0 mm, width 58.0 mm, and net mass 6.046 kg. The limiting speed is 5700 rpm, with a reference speed of 5400 rpm. The tapered bore allows mounting on adapter or withdrawal sleeves, simplifying fitting and removal on plain shafts without a shoulder. The C3 internal clearance offsets the reduction in clearance caused by the interference fit resulting from mounting on a tapered seat, maintaining proper operating clearance once installed. The solid brass cage provides stable ball guidance and low friction at the stated speed levels, while the self-aligning design accommodates shaft bending or housing misalignment without inducing additional internal stress.