SKF 61905-2RS1 Rubber Sealed Thin Section Deep Groove Ball Bearing 25x42x9mm

Equivalent to 6905-2RS

The SKF 61905-2RS1 sealed thin-section deep groove ball bearing provides rotational support for machinery where a 25mm shaft must fit within a restricted housing diameter and width. Its 619 series geometry offers greater load-carrying capacity than the narrower 61805 bearing while remaining more compact than the 6005 series. The single row ball arrangement accommodates radial loads and moderate axial forces in either direction, within its rated capacity. SKF catalogue specifications give a basic dynamic load rating of 7.02kN, a basic static load rating of 4.3kN and a limiting speed of 10,000rpm. These values help engineers evaluate bearing life and suitability for compact drives, rollers and continuously rotating machinery.

The 2RS1 rubber contact seals retain factory grease and help prevent dust and moisture reaching the rolling elements. This protected lubrication arrangement is particularly useful in enclosed assemblies without convenient relubrication access. Contact seals produce additional friction compared with open or non-contact sealed bearings, so continuous speed and operating temperature should be assessed together. Normal radial internal clearance requires consideration of shaft interference fits, housing tolerances and thermal expansion. Although the 61905 offers more load capacity than the extra-thin 61805, its relatively slender rings still benefit from accurately machined seating surfaces and careful mounting. For replacement work, verify the complete designation rather than choosing a bearing solely by its 25mm bore.

Typical Applications:

Compact electric motor and drive assemblies

Industrial guide rollers and handling equipment

Precision rotary positioning mechanisms

Light-duty pumps and ventilation equipment

Space-restricted automation and transmission systems