Angular Contact Ball B. SKF 3209 ATN9

The SKF 3209 ATN9 angular contact ball bearing, measuring 45 × 85 × 30.2 mm, combines high radial and axial load-carrying capacity on both sides with a compact installation width.

The SKF 3209 ATN9 double-row angular contact ball bearing is an open rolling bearing made from standard bearing steel (100Cr6) for demanding industrial applications. With a bore of 45 mm, an outer diameter of 85 mm and a width of 30.2 mm, this design accommodates combined forces. The double-row design is functionally equivalent to two single-row angular contact ball bearings in an O-arrangement, but requires less axial installation space. A dimensionally stable polyamide cage guides the rolling elements with low vibration across the permissible temperature range of -20 to +120 degrees Celsius.

What is the 3209 ATN9 double-row angular contact ball bearing suitable for?

Thanks to its contact angle of 30 degrees, the 3209 ATN9 angular contact ball bearing simultaneously transmits high radial forces and axial forces on both sides. Its use is particularly recommended for rigid bearing arrangements where, in addition to forces acting in varying directions, tilting moments must also be supported. SKF’s Explorer design is engineered to ensure even force distribution across the rolling element contact.

What are the advantages of the polyamide cage and tolerance class P6/P5?

The increased precision, with dimensional accuracy P6 and running accuracy P5, ensures smooth concentricity and minimal vibrations at high speeds. The elastic polyamide cage effectively dampens shock loads and reduces the moment of inertia of the rotating rolling elements compared with solid metal cages.

As this is an open bearing without an integrated seal, you can tailor the lubricant supply and external shaft seals to suit your specific operating environment. The standard radial bearing clearance is designed to provide the correct operating clearance in the rolling element contact for typical fit selections and operating temperatures between -20 and +120 degrees Celsius.