Deep Groove Ball Bearings SKF 6209 -Z/C3

The SKF deep groove ball bearing 6209 -Z/C3 combines dimensions of 45x85x19 mm with a single-sided Z-end cap and increased C3 radial clearance for thermally stressed industrial applications.

The SKF 6209 -Z/C3 deep groove ball bearing is a single-row rolling bearing made from standard 100Cr6 bearing steel. The design accommodates radial forces as well as axial loads in both directions. The single-sided sheet metal cover protects one side against solid particles, whilst the open opposite side allows lubricant to enter from inside the housing. A steel sheet cage guides the rolling elements evenly between the raceways.

In which applications is the 6209-Z/C3 deep-groove ball bearing used?

This bearing design is primarily used in machinery where operational heating occurs and lubricant is supplied from one side of the housing. As the bearing is designed for a temperature range of –20 to +150 degrees, it is suitable for bearing locations with significant heat generation. The asymmetrical seal shields against external contaminants, whilst grease or lubricating oil can reach the rolling elements unhindered from the open inner side.

When is the combination of C3 radial clearance and a Z-type cover plate appropriate?

This variant is selected when tight fits or temperature differences between the shaft and housing reduce the radial operating clearance. The designation C3 indicates a slightly increased radial bearing clearance compared with the standard version. This allows the bearing to compensate for thermal expansion without causing stress during operation. The non-contacting Z-cover ring does not generate any additional frictional heat and is suitable for tolerance class P0/PN.