Self-Aligning Ball B. FAG 1212 -K-TVH-C3

The FAG 1212 -K-TVH-C3 double-row self-aligning ball bearing (60x110x22 mm) compensates for misalignment and features a tapered bore and increased C3 clearance.

The 1212 -K-TVH-C3 self-aligning ball bearing is a double-row rolling bearing from FAG made from standard rolling bearing steel (100Cr6) with a common hollow-spherical raceway in the outer ring. This design automatically compensates for angular misalignment between the inner and outer rings, enabling the bearing to compensate for misalignment or shaft deflection during operation. With key dimensions of a 60 mm bore, 110 mm outer diameter and 22 mm width, as well as tolerance class P0/PN (ABEC 1), the open version is designed for a wide range of bearing applications in mechanical engineering.

In which installation situations does the 1212 -K-TVH-C3 self-aligning ball bearing compensate for misalignment?

The use of the 1212 -K-TVH-C3 self-aligning ball bearing is particularly recommended for bearing seats where elastic shaft deflection or misalignment between the bearing positions may occur. Thanks to the hollow-spherical outer ring raceway, the two rows of balls pivot freely. This counteracts the rolling elements becoming jammed in the event of angular misalignment. The polyamide cage guides the rolling elements with low rolling noise and is suitable for operating temperatures ranging from –30 to +120 degrees Celsius. Typical applications include industrial drives and shaft bearings with larger bearing clearances under varying loads.

What is the function of the tapered bore and C3 clearance during bearing installation?

The tapered bore with a taper ratio of 1:12 (suffix K) allows for mounting directly onto a tapered shaft seat or, using a shrink sleeve, onto cylindrical shafts. During this process, the axial sliding of the inner ring measurably reduces the radial bearing clearance. The factory-set increased radial bearing clearance (C3) compensates for this loss of clearance during installation and allows sufficient room for thermal expansion during operation. As this is an open bearing without an integrated seal, the lubricant and housing seal must be selected to suit the operating conditions.