Deep Groove Ball Bearings SKF 6211 -RS1/C3

The SKF 6211-RS1/C3 deep groove ball bearing, measuring 55 x 100 x 21 mm, with a single-sided seal and increased bearing clearance, ensures smooth running under thermal stress.

The SKF 6211 -RS1/C3 from SKF is a single-row radial ball bearing made from standard bearing steel (100Cr6), with an inner diameter of 55 mm, an outer diameter of 100 mm and a width of 21 mm. It accommodates radial forces as well as axial loads in both directions. The design combines a robust sheet steel cage with a single-sided seal and a slightly increased clearance (C3). This configuration is primarily intended for bearing installations where thermal expansion needs to be compensated for and where single-sided protection against particles is sufficient.

In which installation situations is the 6211-RS1/C3 deep-groove ball bearing used?

This deep-groove ball bearing is typically used where one side of the bearing housing is specifically lubricated by the interior of the housing. As the design features a single RS1 contact seal on one side, the open side remains accessible for lubricant supply. At the same time, the sealing lip shields the bearing against the ingress of external contaminants. Manufacture to the standard tolerance class P0/PN (corresponding to ABEC 1) ensures the required fit accuracy on the shaft and in the housing seat.

What are the functions of the RS1 seal and the C3 bearing clearance?

The increased C3 bearing clearance provides the rolling elements with additional radial clearance. If, during operation, temperature differences arise between the inner and outer rings, or if loose fits cause the inner ring to expand, this excess clearance prevents the balls from becoming jammed. The permissible temperature range is from –20 to +120 degrees Celsius. The single-sided RS1 seal protects the raceway from contaminants and generates less friction compared to designs that are sealed on both sides.