This deep groove ball bearing carries radial and limited axial loads on a single row of balls, with a bore diameter of 50.0 mm, outside diameter of 90.0 mm, and width of 20.0 mm. It is built with a steel sheet metal cage (JN) and sealed on both sides (2RSR), which keeps grease in and contaminants out without external protection. The net mass is 0.47 kg, relevant for handling during installation. Limiting speed is rated at 4300 1/min. The internal clearance is C3, wider than standard, which compensates for temperature rise and interference fits during mounting without the bearing running tight. Being factory-sealed, it is pre-lubricated and does not require external relubrication, which simplifies installation in housings where access for maintenance is limited. The bore type Z should be checked against the dimensional drawing on the product card for exact tolerance class.