thrust bearing is generally by two thrust shim or more thrust shim and a number of rolling body composition, general thrust shim is divided into shaft piece and seat piece, rolling body is generally the most common type by iron or copper keep frame combination into a whole. The most common type of bearing is steel ball type thrust shaft definition

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

Thrust ball bearing is a kind of separated bearing, the shaft ring and seat ring can be separated from the cage and ball assembly. The shaft ring is the collar that fits with the shaft, the seat ring is the collar that fits with the housing hole, and there is clearance between the shaft; thrust ball bearing can only bear axial load.

Single direction thrust ball bearing can only bear axial load in one direction.

Double direction thrust ball bearing can bear the axial load in two directions.

thrust ball bearing can not limit the radial displacement of the shaft, the limit speed is very low.

unidirectional thrust ball bearing can limit the axial displacement of the shaft and shell in one direction, the thrust ball bearing can limit the axial displacement of the shaft and shell in one direction.

bi-directional bearing can limit the axial displacement in both directions.

thrust roller bearing is used to bear axial load mainly shaft, radial combined load, but the radial load shall not exceed 55% of the axial load. Compared with other thrust roller bearing, this kind of bearing friction factor is lower, higher speed, and has the performance of adjusting heart.

The roller of 29000 type bearing is asymmetric spherical roller, which can reduce the relative sliding of roller and raceway in the work, and the roller is long, large diameter, the number of rollers, high load capacity, usually using oil lubrication, individual low-speed case available grease lubrication. In the design selection, should be preferred.

80000 type thrust cylindrical roller bearings, 90000 type thrust tapered roller bearings and AXK type thrust needle roller bearings, can withstand one-way axial load, which is much larger than the axial load capacity of thrust ball bearings, and rigid, occupy little axial space.

Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low speed occasions, and the speed of thrust tapered roller bearings is slightly higher than that of thrust cylindrical roller bearings.

Application classification

Thrust bearings are divided into thrust ball bearings and thrust roller bearings.

Thrust ball bearings are also divided into thrust ball bearings and thrust angular contact ball bearings. By the gasket with raceway and ball and cage assembly with the shaft with the raceway ring is called the shaft ring, with the shell with the raceway ring is called the seat ring. Two-way bearings will be in the circle with the shaft with. Single-way bearing can bear one-way axial load, two-way bearing can bear two-way axial load. The mounting surface of the seat ring is a spherical bearing with spherical performance, can reduce the impact of installation errors. These bearings are mainly used in automobile steering mechanism, machine tool spindle.

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, iron and steel making machinery. Thrust spherical roller bearings are mainly used in hydroelectric generators, vertical motors, ship propeller shafts, tower cranes, extruders, etc. Thrust tapered roller bearings are mainly used in: one-way: crane hook, oil drilling rig ring. Bidirectional: steel rolling mill roll neck. Plane thrust bearing in the assembly body mainly to bear the axial load, its application is widespread.

Although the thrust bearing installation operation is relatively simple, but the actual maintenance of the error still often occurs, that is, the bearing tight ring and loose ring installation position is incorrect, the result makes the bearing out of action, the journal is quickly worn. The tight ring is installed on the end face of the stationary parts, i.e. wrong assembly. The inner ring of the tight ring and the journal for the transition fit, when the shaft rotation drive the tight ring, and with the stationary parts end surface friction, in the axial force (Fx), there will be friction torque is greater than the inner diameter with the resistance moment, resulting in tight ring and shaft with the surface forced rotation, intensify the journal wear. Caution

The following points should be noted when installing thrust bearing.

(1)Separate the tight ring and loose ring of the bearing (judged by the size of the inner diameter of the bearing, the difference in bore diameter O.1 ~ O.5mm).

(2) Separate the stationary parts of the mechanism (i.e., the parts that do not move, mainly the assembly).

(3) No matter what the case, the loose ring of the bearing should always be against the end face of the stationary parts.