Deep Groove Ball Bearings SKF 6011 -2Z/C3

The SKF 6011 -2Z/C3 deep groove ball bearing, measuring 55x90x18 mm and featuring sheet metal end shields on both sides and a C3 clearance, offers low-friction operation in high-speed applications.

The 6011 -2Z/C3 deep groove ball bearing is a single-row radial ball bearing in the SKF Explorer series, made from standard 100Cr6 rolling-element steel. It primarily accommodates radial loads as well as moderate axial forces in both directions. The version with a 55 mm bore, 90 mm outer diameter and 18 mm width features a robust sheet steel cage. Thanks to the increased C3 clearance, this model is suitable for applications involving operational heating or tight fits.

Under what operating conditions does the 6011 -2Z/C3 deep groove ball bearing perform well?

This rolling bearing is typically used in industrial shaft mountings and rotating machine drives. The 6011 -2Z/C3 deep groove ball bearing performs particularly well where shafts with a 55 mm diameter rotate at medium to high speeds. The non-contacting cover plates keep the friction torque low, whilst keeping coarse dirt particles out of the bearing interior. Manufacture to tolerance class P6 also ensures high running accuracy.

What are the advantages of combining 2Z cover plates with C3 bearing clearance?

The sheet metal covers on both sides (2Z) protect the raceways from dust ingress without generating additional sliding friction. At the same time, the increased radial bearing clearance (C3) provides a reliable operational buffer: If the inner and outer rings heat up to different degrees during continuous operation, or if tight shaft fits restrict the bearing clearance, the C3 classification counteracts any straining of the rolling elements. This contributes to smooth running and predictable service life.