Angular Contact Ball B. SKF 3206 ATN9/C3

The SKF 3206 ATN9/C3 double-row angular contact ball bearing, measuring 30 × 62 × 23.8 mm, accommodates combined loads and offers increased C3 clearance.

The SKF 3206 ATN9/C3 angular contact ball bearing is an open, double-row rolling bearing made from standard 100Cr6 bearing steel. Thanks to its contact angle of 30 degrees and two rows of balls, this component simultaneously supports radial forces and axial loads in both directions. The design features a bore of 30 mm, an outer diameter of 62 mm and a width of 23.8 mm. With its slightly increased radial clearance (C3), the design is suitable for applications where thermal expansion occurs.

What is the 3206 ATN9/C3 double-row angular contact ball bearing suitable for?

This double-row bearing is used in designs that must accommodate not only radial forces but also alternating or bidirectional axial forces. As angular contact ball bearings transmit loads at an angle to the radial plane, two rows of balls arranged opposite each other provide rigid guidance with minimal axial installation space. Typical applications include shaft mountings in mechanical engineering that require precise guidance under combined loads. The open design requires a clean installation environment and allows for lubrication as required, directly via the surrounding housing system.

What do ‘polyamide cage’ and ‘C3 clearance’ mean for this bearing?

The designation ATN9 indicates a polyamide cage, which ensures quiet operation and covers a temperature range from –20 to +120 degrees Celsius. The C3 classification denotes a radial clearance that is greater than the standard value. This prevents the rolling elements from seizing up when temperature differences arise between the inner and outer rings or when tight fits are selected. Furthermore, the tolerance class P6 or ABEC 3 ensures smooth running whilst meeting higher precision requirements.