SKF 6304-2Z Metal Shielded Single Row Deep Groove Ball Bearing 20x52x15mm

The SKF 6304-2Z metal shielded deep groove ball bearing is engineered for rotating equipment that requires dependable load support combined with low running friction. Its 20mm bore, 52mm outside diameter and 15mm width follow the established 6304 dimensions, making it suitable for correctly sized shafts and bearing housings. The single row deep groove raceways accommodate radial loading as well as axial forces acting in either direction, within the bearing's operating limits. SKF specifies a basic dynamic load rating of 16.8kN and a basic static load rating of 7.8kN. Compared with the smaller 6204 series, the 6304 offers a more substantial bearing cross-section and higher load ratings, although the two sizes are not interchangeable.

The 2Z suffix identifies a metal shield on each side of the bearing. Unlike 2RS1 or 2RSH rubber contact seals, these shields do not contact the inner ring, reducing friction and making the design attractive for relatively clean, higher-speed applications. The shields retain factory-applied grease and provide protection against larger airborne particles, but they are not intended to provide the same resistance to moisture or fine contamination as contacting rubber seals. SKF lists a 30,000rpm reference speed and a 15,000rpm limiting speed, which are distinct catalogue values rather than guaranteed continuous operating speeds. The bearing has normal (CN) radial internal clearance and a sheet metal cage. When replacing an existing bearing, check its complete suffix and clearance specification to ensure the shielding arrangement suits the operating environment.

Typical Applications:

Industrial electric motors and motor-driven machinery

Ventilation fans and air-handling equipment

Centrifugal pumps operating in relatively clean environments

Workshop machinery and mechanical power transmission units

Conveyor drive shafts and enclosed rotating assemblies