Self aligning ball bearings

What is a self-aligning ball bearing?

A self-aligning ball bearing is a type of rolling-element bearing that consists of two rows of balls, a common outer ring with a spherical raceway, and two inner rings with ball raceways. Its design allows it to accommodate misalignment between the shaft and housing.

How does a self-aligning ball bearing handle misalignment?

The spherical raceway in the outer ring allows the inner ring, balls, and cage assembly to tilt relative to the outer ring. This tilting action compensates for angular misalignment, which can be caused by shaft deflection or errors in mounting.

What are the advantages of using self-aligning ball bearings?

The main advantage is their ability to compensate for shaft misalignment, reducing stress on the bearing and surrounding components. This leads to longer bearing life and smoother operation, especially in applications where perfect alignment is difficult to achieve.

What are some common applications for self-aligning ball bearings?

They are commonly used in agricultural machinery, mining equipment, general industrial machinery, and any application where shafts may be subject to deflection or mounting inaccuracies, such as fans, pumps, and conveyor systems.

Can self-aligning ball bearings handle axial loads?

Yes, self-aligning ball bearings can accommodate moderate axial loads in addition to radial loads. However, their axial load capacity is generally lower than their radial load capacity, and the amount of misalignment they can tolerate may be reduced when under significant axial load.