This deep groove ball bearing carries radial and moderate axial loads on a 20.0 mm bore, 52.0 mm outside diameter, and 15.0 mm width, with a net mass of 0.148 kg. Design 6304-C-2Z of Generation C features shields on both sides, protecting the raceway and balls from external contamination while retaining internal lubricant. The steel sheet metal cage (JN) guides the ball complement with low friction. Limiting speed reaches 18700 1/min, with a reference speed of 16100 1/min. Radial internal clearance falls in group CN (normal), suitable for standard shaft and housing fits without preload adjustment. The shielded design (2Z) provides basic protection against dust and splashing, making relubrication less frequent, though not sealed against fine particles or fluid ingress. This bearing suits applications requiring compact dimensions, moderate speed capability, and standard clearance behavior under combined radial and light axial loading.