Radial load carrying between two sealed shields defines this deep groove ball bearing, single row design with a steel sheet metal cage (JN) and a bore of 40.0 mm, outside diameter 90.0 mm and width 23.0 mm. Net mass is 0.632 kg and the limiting speed reaches 4800 1/min. Internal clearance is set to C3 (Group 3), wider than standard, and the bore type is Z. The C3 clearance compensates for thermal expansion and interference fit effects on the shaft, allowing stable operation without excessive preload once running temperature is reached. Integrated seals on both sides retain the factory-filled grease and keep out contamination, so no external lubrication or maintenance access is required during service. Equivalent designations for this size and configuration are SKF 6308-2RS1/C3, NSK 6308DDUC3 and NTN 6308LLUC3.