Deep groove ball bearing supporting radial loads on a 50.0 mm bore, 80.0 mm outside diameter and 16.0 mm width, with a net mass of 272.34 g. The single row of balls runs in a steel sheet metal cage, and both sides are covered with metal shields, keeping the raceway protected while permitting relubrication through the shield design. Radial internal clearance is C3 (Group 3), larger than standard, which compensates for thermal expansion during operation. Limiting speed is rated at 10400.0 1/min, with a reference speed of 8900.0 1/min. The C3 clearance makes this bearing suited for applications where operating temperatures raise the effective clearance above nominal, preventing preload from developing between rings and balls. Metal shields on both faces limit ingress of coarse contaminants while retaining the internal grease fill, making the bearing ready to run without an external sealing arrangement. The steel sheet metal cage guides the ball set at the stated speed ratings, and the fixed radial clearance class supports stable running under the specified limiting and reference speeds.