SKF 61902-2Z Metal Shielded Single Row Deep Groove Ball Bearing 15x28x7mm

The SKF 61902-2Z double-shielded deep groove ball bearing belongs to SKF's thin-section 619 series, offering a compact 28mm outside diameter around a 15mm shaft. Its 7mm width is particularly useful in precision equipment where wider standard-series bearings cannot be accommodated. The single row deep groove construction supports radial loads together with axial forces in either direction, subject to the bearing's rated capacity. SKF specifies a basic dynamic load rating of 4.36kN and a basic static load rating of 2.24kN, providing useful figures for bearing-life calculations and the assessment of peak loading. Compared with a 6002 bearing, which shares the same bore but measures 32 x 9mm externally, the 61902 provides a smaller mounting envelope where radial and axial space are restricted.

The 2Z suffix identifies steel shields on both sides, positioned without rubbing contact against the inner ring. These shields help retain the factory-applied grease and reduce ingress of dust and larger particles while avoiding the additional friction associated with contact rubber seals. They are not intended to provide the same protection against water or fine contamination as a fully contact-sealed bearing. SKF lists a 28,000rpm limiting speed and a 56,000rpm reference speed; these are distinct catalogue values, and the reference speed must not be treated as the permissible maximum. Normal (CN) radial internal clearance and a sheet metal cage complete the specification. For replacement, confirm the 2Z shield suffix, required operating environment and bearing dimensions before installation.

Typical Applications:

Compact high-speed electric motor assemblies

Precision instrumentation and measuring equipment

Small fans and low-friction drive mechanisms

Industrial automation and positioning systems

Thin-section shaft supports in compact machinery