This single row deep groove ball bearing carries the load and locates the shaft radially in a slim design, with a bore of 30.0 mm, outside diameter of 55.0 mm, and width of only 9.0 mm. The narrow cross-section keeps the net mass at 0.081 kg while the bearing tolerates a limiting speed of 18500 1/min and a reference speed of 10000 1/min. The cage is a sheet steel type JN, and radial internal clearance is set to C3 (Group 3), which is wider than normal. The C3 clearance compensates for tighter fits and thermal expansion during operation, keeping the bearing free of excessive preload at running temperature. With its low width and compact envelope, this bearing suits applications where axial space is limited but radial load capacity and moderate to high speed capability are still required. No sealing or shielding is specified, so external protection and relubrication must be provided by the surrounding housing design.