The 105 mm steel shaft sleeve bearing is designed for use with deep groove ball bearings 6021, 6221, and 6321, featuring a sleeve length of 75 mm and available in undersizes of 2 mm, 3 mm, and 4 mm to accommodate bore variations. The compatible 6021 bearing has dimensions of 105 mm inner diameter, 160 mm outer diameter, and 26 mm width, made from high-quality chrome steel (SAE52100) with options for seals or shields (Z, ZZ, RS, 2RS). These bearings support high rotational speeds, radial and axial loads, and are widely used in industries such as automotive, agriculture, and heavy machinery. The 6321 bearing variant measures 105x225x49 mm, offering higher load capacity and durability for demanding applications. These components ensure low friction, high rigidity, and silent operation in various mechanical systems.