The SKF 630/8-2RS1 is a wide-section miniature deep groove ball bearing for equipment needing an 8mm shaft bore with additional axial support width. Measuring 8 x 22 x 11mm, it is 4mm wider than a standard 608 bearing despite sharing the same bore and outside diameter. Rubber contact seals on both sides retain factory grease and help protect the raceways from contamination. With normal radial internal clearance and a sheet metal cage, it is suited to compact rollers, miniature power transmission mechanisms and specialised assemblies designed for its 11mm width.
The SKF 630/8-2RS1 sealed miniature deep groove ball bearing combines a familiar 8mm shaft diameter with an unusually wide 11mm bearing profile. Unlike the conventional 608, which measures only 7mm wide, this design requires extra space between mounting shoulders or retaining components. It is therefore important to identify the complete designation when replacing a bearing in a compact mechanism. Its single row deep groove raceways support predominantly radial loads and accommodate limited axial forces in either direction. SKF catalogue data gives a basic dynamic load rating of 3.45kN and a basic static load rating of 1.37kN. These ratings are comparable with the standard 608, demonstrating that additional width does not necessarily mean increased load capacity.
The 2RS1 rubber contact seals cover both sides of the bearing, retaining factory grease and helping restrict the entry of dust, dirt and moisture. This is particularly useful in enclosed rollers or small drive units where lubrication access is difficult. SKF specifies a limiting speed of 22,000rpm for this sealed configuration, although operating temperature, applied load and contact seal friction must be assessed for continuous running. The bearing has normal radial internal clearance, so excessive shaft or housing interference could reduce its running clearance. With an approximate mass of just 16g, it offers a compact solution for machinery specifically designed around its wider axial dimensions. Installation forces should be applied to the ring being fitted rather than through the
