Carries radial loads in a narrow single-row design, with a steel sheet metal cage (JN) guiding the ball complement. Bore diameter is 20.0 mm, outside diameter 42.0 mm, width only 8.0 mm, giving a mass of 0.048 kg. The limiting speed reaches 26000 1/min, with a reference speed of 13800 1/min, making this bearing suitable for high rotational speeds relative to its size. The C3 radial internal clearance (Group 3) provides a larger-than-normal clearance, compensating for thermal expansion during operation at elevated speeds or temperatures. The reduced width keeps axial installation space to a minimum while the deep groove ball bearing design still accommodates combined radial and moderate axial loading. No integrated sealing or shielding is specified, so relubrication and contamination protection must be arranged externally to match the operating environment.