Self-Aligning Ball B. SKF 1313 EKTN9/C3

The SKF 1313 EKTN9/C3 double-row self-aligning ball bearing, with a tapered bore and C3 clearance, compensates for misalignment in 65 mm diameter shafts during operation.

The SKF 1313 EKTN9/C3 self-aligning ball bearing is an open, double-row rolling bearing made from standard bearing steel (100Cr6). Thanks to the common hollow-spherical raceway in the outer ring, the bearing self-aligns. It thus compensates for misalignment between the inner ring and the outer ring. With dimensions of 65 mm bore, 140 mm outer diameter and 33 mm width, this design is suitable for demanding bearing applications in industrial machinery and plant engineering. The integrated polyamide cage guides the rolling elements evenly.

What is the 1313 EKTN9/C3 self-aligning ball bearing suitable for?

Designs featuring long shafts or flexible housings are prone to deflection and misalignment under load. The 1313 EKTN9/C3 self-aligning ball bearing accommodates such misalignments with angular movement without causing excessive edge pressures on the raceways. Typical applications are found in general mechanical engineering where shaft deflection occurs, as well as in bearing arrangements with static or dynamic misalignment. As this is an unsealed bearing, designers prefer to use the component in lubricated housings with external seals.

What is the function of the tapered bore and the C3 clearance in this bearing?

The tapered bore with a taper ratio of 1:12 enables secure mounting directly onto tapered shaft journals or, using suitable adapter sleeves, onto cylindrical shafts. When the bearing is axially slid onto the tapered seat, the radial clearance is measurably reduced. The increased C3 bearing clearance compensates for this loss of mounting clearance as well as operational thermal expansion within the permissible temperature range of -30 to +120 degrees Celsius. The polyamide cage also reduces the component weight and promotes smooth running.