Self-Aligning Ball B. SKF 2210 ETN9

The SKF 2210 ETN9 double-row self-aligning ball bearing, measuring 50x90x23 mm, compensates for misalignment and ensures quiet shaft operation.

The SKF 2210 ETN9 self-aligning ball bearing is a double-row rolling bearing designed for applications where misalignment or shaft deflection occurs. Thanks to the hollow-spherical outer ring raceway, the two rows of balls self-align automatically during operation. With a bore of 50 mm, an outer diameter of 90 mm and a width of 23 mm, the component complies with tolerance class P0/PN or ABEC 1. It is made of roller bearing steel (100Cr6) and is suitable for operating temperatures ranging from -30 to +120 degrees.

In which bearing arrangements does the self-aligning ball bearing compensate for misalignment?

The bearing is used when manufacturing-related misalignments or elastic deformations of the shaft need to be compensated for. In designs with separate bearing housings or larger bearing spacings, the rows of balls tilt freely within the outer ring. This helps to prevent excessive edge pressures on the rolling elements. The open design allows for application-specific lubrication via external grease or oil lubrication systems.

What are the distinctive features of the ETN9 cage design?

The designation ETN9 stands for a polyamide cage. This material reduces the rotating mass of the rolling element guide, thereby promoting smooth running. In combination with the standard radial bearing clearance, the bearing is suitable for standard fits within the specified temperature range. As the open design has no integrated seals, protection against contamination must be provided by the surrounding housing structure.