Compensates for shaft misalignment and deflection thanks to its spherical outer raceway, allowing two rows of balls to self-align within the outer ring. The 1228-M>J self-aligning ball bearing has a bore diameter of 140.0 mm, outside diameter of 250.0 mm, and width of 50.0 mm, with a net mass of 11.1 kg. The limiting speed is 3900 1/min and the reference speed is 3650 1/min. The cage is a solid brass cage, designation M, guided and machined for stability at higher speeds and temperatures. Radial internal clearance corresponds to group CN (normal), suitable for standard fit and load conditions without preload requirements. The cylindrical bore (type Z) allows direct mounting on a shaft without an adapter sleeve. The self-aligning design accommodates shaft deflection and angular misalignment between housing and shaft, making it suitable for applications where rigid alignment cannot be guaranteed and where radial loads dominate over axial loads.