Self-Aligning Ball B. SKF 1309 EKTN9/C3

The SKF 1309 EKTN9/C3 self-aligning ball bearing, measuring 45x100x25 mm, compensates for angular misalignment and, thanks to its C3 clearance, ensures reliable operation under thermal conditions.

The 1309 EKTN9/C3 self-aligning ball bearing is a double-row rolling bearing from SKF with a tapered bore. The design features a common spherical raceway in the outer ring. This enables the bearing to automatically compensate for misalignment between the shaft and the housing during operation. Manufactured from standard roller bearing steel 100Cr6, the component primarily accommodates radial loads as well as low axial forces in both directions. This design effectively compensates for elastic deflections and misalignment.

What is the 1309 EKTN9/C3 self-aligning ball bearing suitable for?

This self-aligning ball bearing is particularly suitable for applications involving long shafts where misalignment or elastic deflection may occur. Thanks to the hollow-spherical outer ring raceway, the two rows of balls within the bearing can swivel freely without significantly impeding rotation. Typical applications are found in general mechanical engineering, where shaft elasticity or housing displacement needs to be compensated for. The open design allows for direct lubrication via the housing with oil or grease, tailored to the respective environmental conditions.

What is the function of the tapered bore and the C3 clearance?

The designation EKTN9/C3 indicates three key design features. The tapered bore with a 1:12 taper allows mounting on a tapered shaft or, using a suitable adapter sleeve, on a cylindrical shaft. The suffix C3 denotes a slightly increased radial bearing clearance. This additional radial clearance compensates for the reduction in bearing clearance that occurs when the bearing is pushed onto the tapered seat and when it heats up. The integrated polyamide cage guides the rolling elements within a temperature range of -30 to +120 degrees.