Self-Aligning Ball B. SKF 1306 ETN9

The SKF 1306 ETN9 self-aligning ball bearing, with a 30 mm bore and an outer diameter of 72 mm, automatically compensates for angular misalignment of the shaft.

The double-row self-aligning ball bearing 1306 ETN9 primarily accommodates radial forces and tolerates misalignment between the shaft and the housing. The hollow spherical raceway in the outer ring allows the two ball cages to adjust their angular position. SKF manufactures this model from standard roller bearing steel (100Cr6) with standard radial clearance. This version has a cylindrical bore, measures 19 mm in width and is designed for operating temperatures ranging from -30 to +120 degrees. The dimensional and running accuracy complies with tolerance class P0/PN or ABEC 1.

In which applications is the 1306 ETN9 self-aligning ball bearing used?

The bearing is used wherever manufacturing-related misalignments or elastic deflections of the shaft occur. The spherical raceway shape helps to prevent localised edge pressures on the rolling elements and to limit friction during operation. Design engineers prefer to incorporate this rolling bearing in applications involving long shafts or split bearing housings to accommodate misalignments without the need for additional clamping.

What are the distinctive features of the ETN9 polyamide cage?

The version with the suffix ETN9 features a polyamide cage. This lightweight cage material reduces inertial forces within the bearing and is characterised by its elastic damping properties. As this is an open design without integrated sealing washers, users select the appropriate grease or lubricating oil to suit the operating temperature. An external seal on the housing protects the raceways from dirt and moisture.