Deep Groove Ball Bearings SKF 6311 -2Z/C3

The SKF 6311 -2Z/C3 deep groove ball bearing combines dimensions of 55x120x29 mm with cover plates on both sides and increased C3 radial clearance for demanding industrial applications.

With the 6311 -2Z/C3 deep groove ball bearing, you are selecting a single-row radial ball bearing made from 100Cr6 rolling bearing steel. The design, which has no ring groove, accommodates radial loads as well as moderate axial forces in both directions. A sturdy sheet steel cage maintains the rolling elements at a uniform distance. The cover plates on both sides protect the bearing interior from coarse contaminants.

What is the 6311 -2Z/C3 deep groove ball bearing suitable for in operation?

This design is used in shaft mountings with a 55 mm diameter, where predominantly radial forces are present. As the cover plates are designed as non-contact gap seals, they do not generate any additional frictional heat at the sealing points. This enables speeds on a par with open mountings.

Its use is particularly recommended when rotating components need to be protected against the ingress of dust or swarf without incurring friction losses.

When is the combination of C3 bearing clearance and 2Z cover plates advisable?

The increased C3 bearing clearance provides the rolling elements with more radial freedom than standard bearing clearance. This prevents the rolling elements from jamming when operational heating of up to +120 degrees Celsius causes the shafts to expand or when fixed installation dimensions reduce the bearing clearance.

The version with sheet metal cover plates (2Z) shields the interior from particles. In combination with tolerance class P0 (ABEC 1), this provides a versatile rolling bearing for thermally stressed designs.