This self-aligning ball bearing compensates for shaft misalignment thanks to its two rows of balls running in a common spherical raceway in the outer ring. Bore diameter is 85.0 mm, outside diameter 180.0 mm, and width 41.0 mm, with a net mass of 5.134 kg. The tapered bore (K, taper 1:12) allows mounting on tapered shaft seats or with adapter/withdrawal sleeves, giving a defined interference fit without the need for a straight bore adjustment. The cage is a solid brass cage (M), suitable for higher speeds and operating temperatures than a pressed steel cage. Radial internal clearance is C3 (Group 3), greater than normal clearance, which compensates for interference fit tightening during mounting and for thermal expansion during operation. Limiting speed is 5800 1/min, with a reference speed of 4300 1/min. The tapered bore design permits axial adjustment of the bearing on the shaft to set the correct operating clearance, while the self-aligning construction accommodates angular misalignment and shaft deflection without inducing additional internal loading.