Deep Groove Ball Bearings SKF 6308

The SKF 6308 single-row deep groove ball bearing, with dimensions of 40x90x23 mm, is designed as an open rolling bearing for combined radial and axial loads.

The SKF 6308 deep groove ball bearing is a versatile rolling bearing for industrial drive and guidance systems. With a bore of 40 mm, an outside diameter of 90 mm and a width of 23 mm, this component primarily accommodates radial forces as well as moderate axial forces in both directions. The open bearing design allows for flexible lubrication via the machine’s existing oil or grease circuit. Manufactured from standard 100Cr6 rolling-element bearing steel in the SKF Explorer performance class, the component meets tolerance class P0/PN.

For which operating conditions is the 6308 open deep-groove ball bearing suitable?

This single-row bearing is typically used in rotating machine components and general industrial drives. As it is an open design without a grinding disc or cover plate, the bearing operates with low frictional resistance. It is suitable for designs operating at higher speeds, provided the bearing location is protected from contamination by external housing seals. The permissible temperature range extends from –20 to +120 degrees Celsius.

What does the standard radial clearance mean for the 6308 deep-groove ball bearing?

Normal radial bearing clearance describes the standard clearance between the rolling elements and the raceways when the bearing is unmounted. This clearance compensates for operational thermal expansion as well as the slight expansion of the inner ring when pressed onto the shaft. For standard fit conditions and consistent operating temperatures, this design ensures low-vibration operation. The design is complemented by a guided sheet steel cage, which keeps the rolling elements spaced apart and distributes the lubricant evenly across the raceway area.