Self-Aligning Ball B. SKF 2309 ETN9

The SKF 2309 ETN9 self-aligning ball bearing flexibly compensates for misalignment with a shaft diameter of 45 mm and, thanks to its polyamide cage, operates with low friction.

The SKF 2309 ETN9 double-row self-aligning ball bearing absorbs radial forces and accommodates misalignment between the inner and outer rings. Manufactured from standard roller bearing steel (100Cr6), this roller bearing has a bore of 45 mm, an outer diameter of 100 mm and a width of 36 mm. With standard radial clearance and tolerance class P0/PN (ABEC 1), this design complies with common industry standards for precision-fit shaft mountings in mechanical engineering.

In which installation scenarios does the 2309 ETN9 self-aligning ball bearing compensate for misalignment?

Designs featuring long shafts or flexible housings are prone to deflection and misalignment during operation. The 2309 ETN9 self-aligning ball bearing automatically compensates for such static and dynamic angular misalignments thanks to its hollow-spherical outer ring raceway. The double-row design absorbs radial forces and accommodates operational shaft misalignments. As it has no integrated seals, this open bearing is suitable for applications where lubricant needs to circulate freely.

What are the key features of the polyamide cage in the ETN9 design?

The integrated polyamide cage guides the two rows of balls with low internal friction and ensures quiet running. Plastic materials dampen dynamic shock loads and reduce centrifugal forces at higher speeds. When designing the bearing, the permissible temperature range of -30 to +120 degrees Celsius must be taken into account. As this is an unsealed bearing, the bearing housing requires an external seal to protect against dirt, as well as continuous grease or oil lubrication.