This deep groove ball bearing carries radial and moderate axial loads in a single row of balls, with a bore diameter of 20.0 mm, outside diameter of 42.0 mm, and width of 16.0 mm. The bearing weighs 86.0 g and is fitted with a steel sheet metal cage (JN). Both sides are protected by seals, and the radial internal clearance is C3 (Group 3), wider than standard. The limiting speed is rated at 9700.0 1/min. The C3 clearance compensates for thermal expansion and interference fit tightening on the shaft, making the bearing suitable for applications where operating temperatures rise during use. The seals on both sides retain the internal lubricant and keep out dust and moisture, so no external maintenance or relubrication is required during service. The steel sheet metal cage guides the balls reliably at the stated limiting speed while keeping the bearing lightweight.