This deep groove ball bearing carries the single row ball design with a steel sheet metal cage (JN), matching bore diameter of 40.0 mm, outside diameter of 90.0 mm and width of 23.0 mm. Net mass is 0.614 kg. The bearing runs with C3 (Group 3) radial internal clearance and bore type Z. Limiting speed is rated at 10800 1/min, with a reference speed of 9000 1/min. The C3 clearance compensates for thermal expansion of the shaft during operation, making the bearing suitable where operating temperatures raise the effective fit between inner ring and shaft. The steel sheet metal cage guides the ball set at the stated speed ratings without adding significant mass. Equivalent designations for this size and construction are SKF 6308/C3, NSK 6308C3 and NTN 6308C3.