Self-Aligning Ball B. SKF 1307 EKTN9/C3

The SKF 1307 EKTN9/C3 self-aligning ball bearing (35x80x21 mm) compensates for misalignment and features a tapered bore and C3 clearance.

The SKF 1307 EKTN9/C3 self-aligning ball bearing is a double-row rolling bearing made from standard bearing steel (100Cr6) with a common hollow-ball raceway in the outer ring. This design compensates for misalignment between the shaft and housing by allowing angular movement. With key dimensions of a 35 mm bore, 80 mm outer diameter and 21 mm width, this version serves as an open bearing for applications where lubrication is supplied from the outside. A dimensionally stable polyamide cage guides the rolling elements.

In which applications is the 1307 EKTN9/C3 self-aligning ball bearing used?

This bearing is primarily used where shaft deflection or misalignment between the bearing locations may occur. Typical applications can be found in general mechanical engineering as well as in drive systems with longer shaft spacings. As the bearing is of open design, it can be integrated directly into lubricated housing systems. The permissible temperature range extends from –30 to +120 degrees Celsius and covers industrial operating conditions.

When is a tapered bore with C3 clearance advantageous?

The tapered bore with a 1:12 taper allows for mounting on a tapered shaft seat or, using a shrink sleeve, on cylindrical shafts. When the bearing is pushed onto the taper, the radial bearing clearance is reduced. The slightly increased C3 radial bearing clearance set at the factory compensates for this displacement effect, ensuring that the required operating clearance remains after installation. During assembly, the axial displacement should be adjusted to the desired residual bearing clearance.