Thrust bearings (also known as thrust bearings) are mechanical components specifically designed to withstand axial forces, consisting of thrust washers, rolling elements, and retainers. They are mainly divided into two types: thrust ball bearings and thrust roller bearings. It achieves axial load transmission through the cooperation of shaft rings and seat rings. Thrust ball bearings are suitable for medium and low-speed scenarios, while thrust roller bearings have higher load capacity and alignment performance, and are widely used in fields such as automotive steering and machine tool spindles. Thrust ball bearings are divided into two types: one-way and two-way. The shaft ring is matched with the shaft, and the seat ring is matched with the bearing seat hole. Self aligning bearings can reduce the impact of installation errors. Thrust roller bearings include cylindrical rollers, self-aligning rollers, and other types, suitable for heavy-duty scenarios such as oil drilling rigs and hydroelectric generators. During installation, it is necessary to distinguish between tight rings and loose rings. The loose ring should always be tightly attached to the end face of the stationary part to avoid journal wear.