This deep groove ball bearing carries a cylindrical bore of 50.0 mm, an outside diameter of 90.0 mm and a width of 23.0 mm, with a net mass of 0.53 kg. It is built as a single row bearing with a steel sheet metal cage (JN) and radial internal clearance in group CN. Seals are fitted on both sides (2RSR), keeping the raceway protected from contamination while retaining the grease fill inside the bearing. The CN clearance corresponds to normal running conditions without preload, suitable for standard radial loading. The permissible limiting speed is 4250 1/min. Sealing on both sides removes the need for external protection and supports maintenance-free operation once greased, while the sheet metal cage keeps the design compact and lightweight for the given bore size.