SKF 61811-2RS1 Rubber Sealed Single Row Deep Groove Ball Bearing 55x72x9mm

The SKF 61811-2RS1 sealed thin section deep groove ball bearing supports 55mm rotating shafts in machinery where both housing diameter and bearing width are tightly restricted. Its 618 series construction offers a much smaller cross-section than conventional deep groove ball bearings, making it useful in compact equipment where a heavier bearing would be unnecessarily bulky. The single row ball arrangement accommodates radial loading and moderate axial forces in either direction, within its rated capacity. SKF catalogue specifications list a basic dynamic load rating of 9.04kN, a basic static load rating of 8.8kN and a limiting speed of 5,300rpm. These relatively modest load ratings make correct load assessment especially important before selecting this bearing for industrial equipment.

The 2RS1 rubber contact seals retain the factory grease and help protect the internal components against dust, dirt and moisture. This eliminates the need for a separate routine greasing arrangement in many suitable applications, although seal friction must be considered when assessing running temperature and speed. Normal radial internal clearance requires carefully controlled shaft and housing fits. Because the bearing rings are particularly thin, excessive interference or housing distortion can reduce internal clearance and affect running performance. Correct installation methods, accurate seating surfaces and proper alignment are therefore essential. When replacing an existing bearing, match the complete 2RS1 designation to preserve the original sealing arrangement.

Typical Applications:

Compact rotary positioning mechanisms

Space-restricted automation equipment

Lightly loaded industrial shaft assemblies

Precision handling and indexing systems

Specialised machinery with narrow bearing housings