Thrust Roller Bearings are used to support axial and radial combined loads dominated by axial loads, but The load must not exceed 55% of the axial load. Compared with other thrust roller bearings, this type of bearing has a low friction factor, a high rotational speed, and has a self-aligning performance. The stick of the 29000 type bearing is an asymmetrical spherical roller, which can reduce the relative sliding of the roller and the raceway during operation, and has a long roller, a large diameter, a large number of rollers, a high load capacity, and is usually oil lubricated. Individual low speed conditions can be lubricated with grease. In design selection, it should be preferred; 80000 thrust cylindrical roller bearings, 90000 thrust tapered roller bearings and AXK thrust needle bearings can withstand one-way axial loads, which is more axial than thrust ball bearings. The load capacity is much larger, and the rigidity is large and the axial space is small. Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low speed applications. Thrust tapered roller bearings have a slightly higher rotational speed than thrust cylindrical roller bearings. Thrust roller bearings are divided into thrust cylindrical roller bearings, thrust spherical roller bearings, thrust tapered roller bearings, thrust needle roller bearings.  Thrust cylindrical roller bearings are mainly used in oil drilling rigs and steelmaking machinery.   Thrust spherical roller bearings These bearings are mainly used in hydroelectric generators, vertical motors, propeller shafts for ships. , tower cranes, extruders, etc.   Thrust tapered roller bearings The main uses of these bearings: one-way: crane hooks, oil rig swivel. Two-way: rolling mill roll neck.   Plane thrust bearings in the assembly mainly It can withstand axial loads and is widely used. Although the installation of the thrust bearing is relatively simple, there are often errors in the actual maintenance, that is, the tight ring and the loose ring of the bearing are not installed correctly, and the bearing is lost, and the journal is quickly worn. The tight ring is mounted on the end face of the stationary part, ie incorrect assembly. The inner ring of the tight ring and the journal are in a transitional fit. When the shaft rotates, the tight ring is driven and friction is generated 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 and the resistance torque will be tight. Forced rotation of the ring-to-shaft mating surface exacerbates journal wear.