What is the primary function of a thrust bearing?

The primary function of a thrust bearing is to contain the axial motion of the shaft. This means it is specifically designed to handle forces that are applied along the axis of the shaft, which can occur in applications like rotating machinery where the load pushes or pulls parallel to the shaft.

Thrust bearings provide a surface that supports these axial loads, preventing the shaft from moving too far in the direction of the applied force. This is crucial in maintaining the proper alignment and function of rotating components, ensuring they operate smoothly and efficiently.

The other functions, such as limiting radial motion, supporting heavy loads, or facilitating high-speed rotation, may be relevant in broader bearing applications but do not specifically define the primary purpose of a thrust bearing, which is uniquely focused on managing axial loads.