Self-Aligning Ball B. SKF 1220 K

At a glance: The SKF 1220 K double-row self-aligning ball bearing compensates for misalignment and measures 100 × 180 × 34 mm with a tapered bore.

The 1220 K self-aligning ball bearing is a double-row rolling bearing designed for applications where misalignment between the shaft and housing may occur. The hollow spherical raceway in the outer ring allows the two rows of balls to adjust their angular position. This SKF model is made from standard rolling-element bearing steel (100Cr6) and operates within a temperature range of -30 to +150 degrees Celsius. Designed as an open bearing, it allows for a free supply of lubricant and can be relubricated directly if required.

What is the 1220 K self-aligning ball bearing suitable for?

This bearing compensates for both static and dynamic angular misalignments, such as those caused by shaft deflection under load. The 1220 K self-aligning ball bearing is typically used in bearing arrangements with long shafts or separate stand-alone bearing housings, where misalignment is unavoidable. The version with a sheet steel cage guides the rolling elements with low vibration and is suitable for medium speeds and varying loads. In such designs, the double-row configuration compensates for misalignment without increased friction or premature wear.

Why is the tapered bore on the 1220 K self-aligning ball bearing advantageous?

The suffix ‘K’ denotes a tapered bore with a taper ratio of 1:12. This design facilitates mounting on tapered shaft seats as well as on cylindrical shafts using a clamping or withdrawal sleeve. The component has tolerance class P0/PN (ABEC 1) and a standard radial clearance. When slid onto the taper, the radial clearance is specifically reduced, allowing you to precisely determine the tightness of the fit. Before installation, check the dimensions: 100 mm bore, 180 mm outside diameter and 34 mm width.