Deep Groove Ball Bearings SKF 6306 /C3

The SKF 6306/C3 deep groove ball bearing, measuring 30x72x19 mm, offers increased bearing clearance for demanding thermal operating conditions.

The 6306 /C3 deep groove ball bearing is a single-row rolling bearing from SKF that accommodates radial forces as well as axial loads in both directions. With a bore of 30 mm, an outside diameter of 72 mm and a width of 19 mm, the bearing complies with standardised key dimensions. Due to its open design, this ball bearing is suitable for applications where the lubricant is required to circulate freely or where the housing is fitted with an external seal.

In which applications is the 6306/C3 deep groove ball bearing used?

This deep-groove ball bearing is primarily used where temperature differences occur between the inner and outer rings during operation. Typical applications can be found in general mechanical engineering as well as in industrial drives subject to thermal loads. The integrated sheet steel cage guides the rolling elements with minimal vibration and withstands mechanical stresses. As no sealing washers are fitted, the bearing can be supplied with oil or grease directly via the surrounding lubrication system.

What does the C3 bearing clearance mean in terms of design?

The designation C3 indicates a slightly increased radial bearing clearance compared with the standard version. This additional clearance reduces the risk of the bearing becoming stressed due to heating or tight fits on the shaft and housing. In combination with the standard tolerance class P0 (ABEC 1), the design ensures smooth concentricity within a temperature range of -20 to +150 degrees. Designers and maintenance engineers should check before installation whether the operating conditions and choice of fit require this increased bearing clearance.