Angular Contact Ball B. SKF 3208 ATN9/C3

The SKF 3208 ATN9/C3 double-row angular contact ball bearing has dimensions of 40 × 80 × 30.2 mm, a C3 clearance and a 30-degree contact angle for combined loads.

The SKF 3208 ATN9/C3 angular contact ball bearing is a double-row rolling bearing made from standard bearing steel (100Cr6) with a bore of 40 mm, an outer diameter of 80 mm and a width of 30.2 mm. The design complies with tolerance class P6 or ABEC 3 and has a contact angle of 30 degrees. As an open bearing without a flange or groove on the outer ring, it is suitable for applications that must accommodate axial forces on both sides in addition to radial forces. The integrated polyamide cage guides the rows of balls within a temperature range of –20 to +120 degrees.

What is the 3208 ATN9/C3 angular contact ball bearing suitable for in industrial applications?

This double-row rolling bearing is particularly suitable for bearing arrangements subject to combined radial and axial loads in both directions. Thanks to its contact angle of 30 degrees, the double-row design effectively absorbs tilting moments. Design engineers often use this compact design where two single-row bearings would require too much axial installation space. The open design also allows for direct lubrication via a lubrication system provided by the customer.

What are the advantages of the polyamide cage and the C3 radial clearance?

The slightly increased C3 radial clearance gives the rolling elements additional freedom of movement during operation. This is advantageous when operational heating or tight fits lead to radial expansion of the inner ring. The flexible polyamide cage reduces friction and running noise and is designed for operating temperatures between –20 and +120 degrees. The open design requires a clean installation environment and an external lubricant supply.