NSK Angular Contact Bearing Assembly

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Under normal circumstances, the contact angle of the assembled angular contact ball bearings is the same. The following is the allowable external axial load of the preload introduced by Eric Bearing Limited. When the axial load exceeds the rated requirement, some bearings will be unloaded, causing the ball Slippage and cause early bearing failure. In order to avoid unloading phenomenon (that is, increase unloading force), the preload of the bearing set can be increased or NSK bearings with different contact angles can be used for assembly.

In order to meet the bearing capacity and rigidity requirements, NSK angular contact ball bearings can be assembled in a variety of ways during use, and in order to maximize the performance of the bearing after assembly under specific operating conditions, select the appropriate The preload is extremely critical. The correct preload can not only increase rigidity, but also reduce noise, improve shaft guiding accuracy, extend bearing life, improve rotation accuracy, and prevent high-speed applications with fast start/stop, ultra-light load or no-load conditions Slippage occurs.

1. NSK angular contact bearing assembly method

Bearings with different contact angles have the same assembly method as those with the same contact angle. According to the number of assembled bearings, the assembly methods can be divided into double, triple and quadruple, etc.; according to the direction of assembling bearings Different classifications. There are mainly DB, TBT, QBC and DBT types for the assembly of bearings with different contact angles.

2. Preloading method of NSK angular contact bearing

Angular contact ball bearings usually adopt axial preload during use, and the preload methods include positioning preload and constant pressure preload.

(1) Positioning preload

It is through the assembly of the bearing itself or the pre-selected inner and outer ring spacers to keep the distance of the assembled bearing unchanged, so that the bearing can be properly preloaded. Due to the influence of the working state of the NSK bearing and the external environment, the size of the bearing seat and the bearing The components will also change accordingly, which will affect the preload state of NSK bearings. The use of this preload method is beneficial to improve the rigidity of NSK, but it is necessary to pay attention to the influence of the change of preload on the bearing performance.