This deep groove ball bearing supports radial loads in a compact single-row design with a bore diameter of 4.0 mm, outside diameter of 11.0 mm, and width of 4.0 mm, giving a net mass of 1.75 g. It is fitted with steel shields on both sides (2Z) and uses a steel sheet metal cage (JN). The limiting speed reaches 69000 1/min, with a reference speed of 53000 1/min. The radial internal clearance is set to C3 (Group 3), allowing operation with a tighter fit or thermal expansion without loss of rotational freedom. The steel shields protect the raceway and balls from dust ingress while retaining the internal grease fill, making the bearing suitable for small-scale rotating assemblies where low friction and compact dimensions are required. The bore type Z designation confirms the shielded configuration on both sides.