Self-Aligning Ball B. SKF 2211 ETN9

The SKF 2211 ETN9 double-row self-aligning ball bearing, measuring 55x100x25 mm, compensates for misalignment and features a lightweight polyamide cage.

The SKF 2211 ETN9 self-aligning ball bearing is a double-row rolling bearing designed for applications involving shaft deflection or misalignment. The outer ring has a common spherical raceway, allowing the bearing to adjust angularly. Manufactured from standard rolling-element bearing steel 100Cr6, this design – with a standard inner ring and normal radial clearance – covers a wide range of applications in mechanical engineering. With a bore of 55 mm, an outer diameter of 100 mm and a width of 25 mm, the bearing complies with standard installation dimensions.

What is the 2211 ETN9 self-aligning ball bearing suitable for?

Designs featuring long shafts or split housings are prone to misalignment between the inner and outer rings. This bearing accommodates radial loads and automatically compensates for both static and dynamic misalignments. Typical applications include rotating designs prone to elastic shaft deflections. As this is an open bearing without integrated sealing washers, the supply of lubricant via the surrounding machine housing ensures low-friction operation within a temperature range of -30 to +120 degrees.

What are the distinctive features of the polyamide cage in this design?

The suffix ETN9 indicates a polyamide cage. Compared with solid metal cages, this material reduces the weight and mass inertia of the rolling element set. The cage operates quietly and elastically, which is advantageous at varying speeds. When selecting this component, please ensure that the lubricant is compatible with plastics. Furthermore, the component complies with tolerance class P0/PN or ABEC 1 and requires careful force transmission at the pressed-on ring during assembly.