What is the function of a thrust bearing?

The function of a thrust bearing is primarily to support axial loads. Axial loads are forces that are applied parallel to the axis of rotation, which can occur in machinery due to various operational conditions. Thrust bearings are specifically designed to handle this type of loading by providing a surface that can absorb the force without allowing significant movement along the axis.

These bearings provide a low-friction surface that helps reduce wear and tear, ensuring that the components can withstand the forces applied during operation. This is crucial in applications where there are significant axial forces, such as in turbines or propeller shafts, where thrust bearings contribute to the stability and longevity of the machinery.

In contrast, other options like supporting radial loads, reducing friction, or aligning rotating parts pertain to functions that are generally associated with different types of bearings or components within a mechanical system. Radial bearings, for example, specifically manage loads that are perpendicular to the axis, while alignment is usually a function of design clearance rather than bearing type.