This deep groove ball bearing carries loads through a single row of balls guided by a steel sheet metal cage (JN), fitting a 12.0 mm bore and 18.0 mm outside diameter with a width of 4.0 mm. Net mass is 0.003 kg, limiting speed reaches 57000 1/min and reference speed is 25000 1/min, reflecting the compact, low-mass design typical of this narrow section size. Radial internal clearance is set to CN (Group N), giving standard running clearance suitable for normal fit and thermal conditions without additional preload considerations. The steel sheet metal cage keeps ball spacing stable at high rotational speeds while adding minimal mass, and bore type Z relates to the bore surface condition specified for this bearing. These features make the bearing suited for compact assemblies requiring high-speed capability within a small envelope, where standard clearance and a lightweight cage are sufficient for the operating conditions.