SKF 61805-2RS1 Rubber Sealed Single Row Deep Groove Ball Bearing 25x37x7mm

The SKF 61805-2RS1 sealed thin section deep groove ball bearing provides rotational support for compact mechanisms where a conventional bearing would require too much space around a 25mm shaft. Its 618 series design has a particularly small cross-section, allowing the surrounding housing to remain lightweight and narrow. The single row ball arrangement accommodates radial loads and limited axial forces in either direction, subject to the bearing's relatively modest load capacity. SKF catalogue specifications give a basic dynamic load rating of 4.36kN, a basic static load rating of 2.6kN and a limiting speed of 11,000rpm. These figures help engineers assess suitability for small rotary assemblies, especially where shock loading or belt tension could affect bearing life.

The 2RS1 rubber contact seals retain factory grease and restrict contamination without requiring a separate routine relubrication system. This is useful in enclosed mechanisms, although contact sealing creates more friction than an open bearing and should be considered when evaluating speed and temperature. Normal radial internal clearance requires accurately specified shaft and housing fits. With just 6mm of radial section, the thin bearing rings may be sensitive to excessive interference, distorted housings or uneven mounting pressure. The bearing is therefore best suited to carefully aligned, appropriately loaded equipment where compact geometry is a design priority.

Typical Applications:

Compact rotary positioning mechanisms

Lightly loaded automation shaft assemblies

Precision indexing and handling equipment

Small instrument and measuring mechanisms

Specialised machinery with narrow bearing housings