This self-aligning ball bearing compensates for shaft misalignment and deflection through its spherical outer raceway, allowing the outer ring to pivot relative to the inner ring assembly. The bore is tapered at a ratio of 1:12 (designation K), which permits mounting on a tapered shaft seat or with a sleeve, giving a controlled, adjustable fit rather than a plain cylindrical push-fit. Bore diameter is 90.0 mm, outside diameter 160.0 mm, width 30.0 mm, and net mass is 2.48 kg. Limiting speed is rated at 4550 1/min, with a reference speed of 4850 1/min. The cage is designated TVH, a glass-fibre reinforced plastic cage guided on the balls, suited to the self-aligning design. Radial internal clearance is C4 (Group 4), wider than standard clearance, which accommodates thermal expansion and the interference generated by driving the bearing up the tapered bore during mounting. The tapered bore construction requires measuring the reduction in radial clearance during fitting to achieve the correct interference and operating clearance.