小的数值试用于大轴承，而且负荷增大时允许调心角将会减小。

推力调心滚子轴承在运转过程中，滚子受离心力作用，滚子和滚道之间产生相对滑动，导致轴、座圈分离，为了保证轴承正常工作，必须施加一定的

轴向载荷。当作用于轴承的实际轴向载荷小于最小载荷时，轴承必须予紧。

推力调心滚子轴承可承受向重载并且适用于很高的转速。该轴承广泛应用于轧钢机、重型机床、石油钻机、轮船大型立式电机及联合掘进机等重型机械。

Thrust   self-alignment  roller  bearing

　　　Thrust self-alignment roller bearing can bear axial and radial loads simultaneously but the radial load must not exceed 55% of axial loads. The bearing has another advantage of self-alignment. Therefore, it is not sensitive to the axis non-concentricity and flexibility. As long as load P and P0 (P andP0 detonate equivalent rating static load respectively) don’t exceed 0.05C0(C0 denotes basic rating static load) and the axis race rotates, the bearing allows for a self-alignment angle within a certain range. The bearing allows for the self-alignment angles shown in the table below depending on different diameter series.

　　　Small value is applicable for big bearing and allows to reduce self- alignment angle when load increases.
　　　During running of self-alignment roller bearing, centrifugal force acts on the roller and relative slip exists between the roller and the raceway, which could cause the axis and the seat rings to be detached. Some axial loads must be applied to the bearing so as to ensure the bearing to be in a normal operation. When the actual axial load acting on the bearing is smaller than minimum axial load, the bearing must be fastened.
　　　Thrust self-alignment roller bearings can bear heavy axial load and are applicable for high revolution. They are widely used in steel rolling mills, heavy-duly machine tools, petroleum rigs, large-sized vertical electric motors for ships and combined development machines.