Angular Contact Ball B. SKF 3308 ATN9

The SKF 3308 ATN9 double-row angular contact ball bearing accommodates combined radial and axial loads with a 40 mm bore and an outer diameter of 90 mm.

This 3308 ATN9 angular contact ball bearing is designed as a double-row rolling bearing and combines radial load capacity with the ability to accommodate axial forces in both directions. Thanks to the 30-degree contact angle, the design specifically supports axial loads. The Explorer-grade version is made from standard roller bearing steel (100Cr6). As an open bearing without integrated sealing rings, this variant is suitable for applications where lubrication is provided externally via the housing cavity.

What is the 3308 ATN9 angular contact ball bearing suitable for in operation?

Double-row angular contact ball bearings are primarily used where high radial forces occur simultaneously with axial forces on both sides and there is insufficient installation space for two individual bearings. The 30-degree contact angle provides the bearing arrangement with rigid guidance. Typical applications include rigid shaft mountings with axial guidance on both sides, as well as compact assemblies in general mechanical engineering. The open design allows lubricating oil or grease to flow unhindered from the surrounding system.

What properties do the polyamide cage and the P6/P5 tolerance class offer?

The suffix ATN9 denotes a polyamide ball-guided cage, which ensures smooth running and reduces the weight of the rolling element guide. The permissible temperature range is from –20 to +120 degrees Celsius. Furthermore, this bearing combines dimensional accuracy to class P6 with increased running accuracy to class P5. For open bearing arrangements, clean ambient conditions and a properly regulated lubricant supply within the system are required.