Thrust bearings are divided into thrust ball bearings and thrust roller bearings. Thrust ball bearings are divided into thrust ball bearings and thrust angular contact ball bearings. A raceway ring formed by a washer with a raceway, a ball and a cage assembly to cooperate with the shaft is called a shaft washer, and a raceway ring matched with the housing is called a seat ring. The two-way bearing matches the center ring with the shaft. The one-way bearing can withstand the unidirectional axial load, and the two-way bearing can withstand the bidirectional axial load. Spherical bearings with a mounting surface on the seat ring have self-aligning performance, which can reduce the impact of mounting errors. Such bearings are mainly used in automotive steering mechanisms and machine tool spindles.

Thrust roller bearings are divided into thrust cylindrical roller bearings, thrust spherical roller bearings, thrust tapered roller bearings, and thrust needle roller bearings.

Thrust cylindrical roller bearings are mainly used in petroleum rigs, iron and steel machinery. Thrust spherical roller bearings are mainly used in hydro-generators, vertical motors, ship propeller shafts, tower cranes, extrusion machines, etc .; thrust Tapered roller bearings are mainly used for crane hooks, oil rig swivel rings in one direction; roll necks for rolling mills in two directions; flat thrust bearings mainly bear axial loads in assemblies, and they are widely used.

Although the thrust bearing installation operation is relatively simple, errors often occur during actual maintenance, that is, the tight and loose ring installation positions of the bearings are incorrect. As a result, the bearings are rendered ineffective and the journals are quickly worn. The clamping ring is mounted on the end face of the stationary part, which means that it is incorrectly assembled. The inner ring of the tight ring and the journal are a transitional fit. When the shaft rotates, the tight ring is driven and friction with the end face of the stationary part. When the axial force (Fx) is applied, the friction torque will be greater than the inner diameter matching resistance torque, resulting in tightness. The mating surface of the ring and the shaft is forced to rotate, which intensifies the journal wear.