A thrust bearing is a type of bearing designed to support axial loads, which are forces that act parallel to the shaft. These bearings allow for smooth rotation while minimizing friction between moving parts. They are commonly used in applications such as automotive engines, turbines, and gearboxes where axial forces are present. Thrust bearings come in various designs, including ball bearings and roller bearings, each suited for different load capacities and speed requirements. Proper lubrication is essential for their performance and longevity, as it helps reduce wear and heat generation during operation.