The brief introduction to thrust bearings

Aug 24, 2021

Thrust bearing is a special bearing used to bear the axial force, that is, the bearing with the direction force parallel to the shaft, also called the thrust bearing

Thrust ball bearing is a separable bearing, the shaft washer and seat ring can be separated from the cage and steel ball components. 

The shaft ring is a ferrule that matches the shaft, and the seat ring is a ferrule that matches the hole of the bearing seat, and there is a gap between the shaft and the shaft. Thrust ball bearings can only bear axial loads, unidirectional thrust ball bearings can only bear axial loads in one direction, and double-direction thrust ball bearings can bear axial loads in two directions. Thrust ball bearings cannot limit the radial displacement of the shaft, and the limit speed is very low. One-way thrust ball bearings can limit the axial displacement of the shaft and the housing in one direction, and double-direction bearings can limit the axial displacement in two directions.

Thrust roller bearings are used to bear the combined axial and radial load, which is mainly the axial load, but the radial load shall not exceed 55% of the axial load. Compared with other thrust roller bearings, this kind of bearing has lower friction factor, higher speed, and has self-aligning performance. The rollers of type 29000 bearings are asymmetrical spherical rollers, which can reduce the relative sliding of rollers and raceways during work, and the rollers are long and large in diameter, the number of rollers is large, and the load capacity is high. They are usually lubricated by oil. , Grease lubrication can be used in individual low-speed conditions, When designing and selecting, it should be preferred. Type 80000 thrust cylindrical roller bearings, type 90000 thrust tapered roller bearings and AXK type thrust needle roller bearings can withstand unidirectional axial load. It has a much larger axial load capacity than thrust ball bearings, and has greater rigidity. Occupies little axial space. Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low-speed occasions, thrust tapered roller bearings have a slightly higher speed than thrust cylindrical roller bearings.