Deep Groove Ball Bearings FAG 6308 -C3

The single-row deep-groove ball bearing 6308 -C3 from FAG Wälzlager, with dimensions of 40x90x23 mm and increased bearing clearance, accommodates radial forces.

The 6308-C3 deep-groove ball bearing is a single-row rolling bearing designed primarily for radial loads, which also accommodates axial forces in both directions. Manufactured from standard roller bearing steel 100Cr6, this open component has a 40 mm bore, an outer diameter of 90 mm and a width of 23 mm. A sheet steel cage guides the rolling elements evenly within the ball raceway. It is manufactured to the standard tolerance class P0/PN or ABEC 1, making the bearing suitable for a wide range of applications.

What are the key features of the 6308-C3 open deep groove ball bearing?

The 6308-C3 deep groove ball bearing is used in rotating industrial applications where radial load-carrying capacity is the primary requirement. As it is an open design without integrated sealing rings, the bearing operates with low frictional resistance and is suitable for oil- or grease-lubricated environments with external housing seals. The permissible temperature range extends from –20 to +150 degrees Celsius, meaning the rolling bearing retains its dimensional stability even under significant operating heat. Thanks to the outer ring having no flange or groove, the component can be fitted flush into standardised mounting bores.

When is the increased C3 bearing clearance required for the 6308 deep groove ball bearing?

The designation C3 indicates a slightly increased radial clearance compared with the standard clearance class. This additional internal clearance between the inner ring, outer ring and rolling elements compensates for thermal expansion when temperature differences occur between the shaft and housing during operation. Furthermore, the increased bearing clearance helps to prevent the bearing from seizing if tight fits cause the inner ring to expand or the outer ring to contract. For designers, this design therefore offers a practical means of counteracting internal stress conditions.