This deep groove ball bearing carries radial and light axial loads on a shaft with a 12.0 mm bore diameter and an outside diameter of 18.0 mm, in a width of only 4.0 mm. It is built as a single row design with seals on both sides and a steel sheet metal cage (JN), giving a net mass of 3.1 g. The limiting speed reaches 19300.0 1/min, and the radial internal clearance falls in the CN (Group N) range. The thin cross-section and sealed construction make this bearing suitable for compact assemblies where space along the shaft is restricted and contamination ingress must be limited without external protection. The CN clearance class supports smooth running at normal fits and temperatures, while the integrated seals reduce the need for relubrication during service. The steel sheet metal cage keeps the rotating mass low, consistent with the stated net weight and the high permissible limiting speed.