Deep Groove Ball Bearings FAG 6306 -C3

The FAG 6306-C3 deep-groove ball bearing, with dimensions of 30 × 72 × 19 mm and increased bearing clearance, ensures smooth running under thermal stress.

The single-row deep-groove ball bearing 6306 -C3 accommodates radial forces as well as axial loads in both directions. Manufactured from standard rolling-bearing steel 100Cr6, this rolling bearing has a bore diameter of 30 mm, an outside diameter of 72 mm and a width of 19 mm. A robust sheet steel cage guides the rolling elements evenly within the deep raceway. The model complies with the standard tolerance class P0/PN or ABEC 1. It is suitable for enclosed housing designs where the installation environment is clean.

What is the 6306-C3 deep-groove ball bearing suitable for in industrial plant?

Design engineers primarily use this open rolling bearing in enclosed assemblies with centralised lubrication. As there are no integrated seals to generate friction, the bearing runs smoothly and achieves favourable operating characteristics within the machine’s lubrication circuit. The design without sealing washers requires external housing sealing to protect against dirt and moisture. Thanks to its temperature range of –20 to +150 degrees, the bearing operates reliably in environments with continuous heat generation.

What characterises the C3 radial clearance in the 6306 deep-groove ball bearing?

The suffix C3 indicates a slightly increased radial clearance compared with the standard version. This radial clearance compensates for thermal expansion of the shaft and inner ring during operation. Tight fits on the shaft or in the housing also reduce the operating clearance. The C3 bearing clearance ensures that the balls retain sufficient freedom of movement when the bearing is operating at high temperatures. This prevents the rolling elements from becoming unduly jammed, thereby extending the service life of components in thermally stressed sections of machinery.