Carries radial loads and moderate axial loads on a single row of balls running in deep-groove raceways, with a bore of 55.0 mm, outside diameter of 90.0 mm and width of 18.0 mm. The bearing weighs 0.389 kg and is fitted with seals on both sides, together with a steel sheet metal cage (JN). Radial internal clearance is CN (Group N), and the limiting speed under these conditions is 4050.0 1/min. The integrated seals retain the factory grease fill and keep out dirt and moisture, so no external sealing arrangement or relubrication interval needs to be planned for. CN internal clearance suits standard shaft and housing fits without additional adjustment, and the steel sheet metal cage keeps ball spacing stable at the stated speed limit. Dimensionally and constructionally this bearing corresponds to SKF 6011-2RS1, NSK 6011DDU and NTN 6011LLU.