Deep Groove Ball Bearings SKF 6306 -2RS1/C3

The SKF 6306 -2RS1/C3 deep-groove ball bearing, measuring 30x72x19 mm, with double-sided laboured seals and a C3 clearance, ensures smooth running under thermal conditions.

The SKF 6306 -2RS1/C3 single-row deep groove ball bearing accommodates radial loads as well as axial forces in both directions. Manufactured from standard rolling-element bearing steel (100Cr6) and fitted with a sheet steel cage, this version has a bore of 30 mm, an outside diameter of 72 mm and a width of 19 mm. The bearing, which has no groove or flange on the outer ring, is designed for a temperature range of –20 to +120 degrees Celsius.

What is the 6306-2RS1/C3 deep groove ball bearing suitable for?

This design is primarily used on rotating shafts where thermal influences or slight misalignments occur. Typical applications can be found in general mechanical engineering as well as in drives and pumps. The double-sided seal keeps out contaminants and moisture. At the same time, the increased bearing clearance compensates for heat-induced dimensional changes during operation, thereby preventing the rolling elements from seizing.

What are the characteristics of C3 bearing clearance and the 2RS1 seal?

The designation C3 stands for a slightly increased radial bearing clearance compared with the standard version. This internal clearance between the rolling elements and raceways compensates for assembly fit oversizes and operational heating. The designation 2RS1 refers to double-seal arrangements that enclose the internal space and retain the lubricant within the bearing. In combination with tolerance class P0 (PN or ABEC 1), this design ensures stable operation under industrial conditions.