Angular Contact Ball B. SKF 3205 ATN9

The SKF 3205 ATN9 double-row angular contact ball bearing, with a 25 mm bore and an outer diameter of 52 mm, accommodates combined radial and axial loads.

The 3205 ATN9 angular contact ball bearing is a double-row rolling bearing made from standard bearing steel (100Cr6) in SKF’s Explorer performance class. Thanks to two rows of balls and a contact angle of 30 degrees, this design can simultaneously accommodate high radial forces and axial forces acting in both directions. The bearing has a standard radial clearance and an increased tolerance class with dimensional accuracy P6 and running accuracy P5. As an open design without sealing rings, it is suitable for bearing arrangements with external lubrication.

What advantages does the 3205 ATN9 double-row angular contact ball bearing offer under combined loads?

This double-row angular contact ball bearing is primarily used where installation space in the axial direction is limited and axial forces acting on both sides need to be supported. Functionally, it replaces two single-row bearings mounted back-to-back, with a width of 20.6 mm. The design is suitable for bearing arrangements subjected to combined loads in general mechanical engineering. The open design allows lubricant to reach the raceways directly.

What is the function of the polyamide cage and the tolerance class P6/P5?

The suffix ATN9 denotes a polyamide cage, which ensures smooth running and low friction. The permissible temperature range is between –20 and +120 degrees Celsius. The combination of dimensional accuracy P6 and finer running accuracy P5 promotes low-vibration concentricity. When fitting the open bearing, care must be taken to ensure a clean installation environment to protect the open raceways from dirt.