Deep Groove Ball Bearings SKF 6305 -RS1/C3

The SKF 6305 -RS1/C3 deep groove ball bearing combines a 25 mm bore with a single-sided RS1 seal and increased C3 bearing clearance for demanding industrial applications.

The 6305 -RS1/C3 is a single-row radial ball bearing made from standard bearing steel (100Cr6) with main dimensions of 25 mm inner diameter, 62 mm outer diameter and 17 mm width. The design is primarily intended to accommodate radial loads as well as moderate axial forces in both directions. A sheet steel cage guides the rolling elements with minimal vibration and retains the lubricant at the contact points. This SKF product complies with tolerance class P0 (standard tolerance according to ABEC 1).

In which applications is the 6305-RS1/C3 deep groove ball bearing used?

This deep-groove ball bearing is used in designs that require protection against particles on one side whilst utilising a lubricant supply from the unsealed side. The single-sided seal protects the bearing interior from external contaminants, whilst the open opposite side allows for lubricant exchange via a housing oil bath. Thanks to its design, the unit is suitable for operating temperatures ranging from –20 to +120 degrees Celsius.

At the same time, the outer ring – which has no groove or flange – facilitates standardised installation in cylindrical housing bores in mechanical engineering applications.

What do the C3 bearing clearance and RS1 seal mean for this model?

The designation C3 indicates increased radial bearing clearance compared with the standard version. The radial clearance between the outer and inner rings compensates for thermal expansion caused by heating during operation and prevents internal stresses. This variant is suitable for bearing locations where tight fits or temperature effects reduce the bearing clearance during operation.

The RS1 designation refers to a single-sided abiding seal lip that prevents dirt particles from entering the bearing interior.