Assembly of thrust ball bearings

There are two key points in thrust ball bearing assembly. One is the control of the pressing quality of the cage and the steel ball, and the other is the control of the nominal height T of the bearing after assembly. In addition, because the shaft ring and the seat ring can be separated, it brings a management problem. It is to prevent the mixing of imported bearing parts. The M-type stamping cage uses a flange assembly die. After pressing, the steel ball is required to rotate flexibly in the pocket, but it cannot fall off from the pocket, and the technical regulations check the amount of movement of the steel ball in the pocket. If the embossing of the solid cage is too deep, the amount of movement of the steel balls will be small, and the connection between the embossed raised part and the cage is too small and the strength is insufficient, which is prone to block falling and causes the cage to be scrapped. The difference between the inner diameter of the small thrust ball bearing seat ring and the shaft ring is very small, and there is no obvious difference between the two sets. In order to prevent the phenomenon of mixed sets, that is, it is found that both of the assembled set of bearings are seat rings or shaft rings. This requires certain measures. Usually, the auxiliary tooling is used to distinguish the drawing ring and the seat group during assembly, or the inner diameter plug gauge is used to check the inner diameter size before sampling the nominal height. For the convenience of checking the inner diameter, the seat ring is placed on the bottom and the shaft ring is placed on the top. If the inner diameter of the seat ring has obvious quenching and heating oxidation color or has not been ground, it is not necessary to inspect the inner diameter size, and the difference between the shaft ring and the seat ring can be clearly seen, and it is not easy to mix. After the thrust ball bearing is assembled, it is necessary to measure the nominal height T to confirm whether it is qualified. When measuring, calibrate with a height block or a standard part, and measure the load. The bearing needs to rotate dozens of times to reach the minimum height.
When the thrust ball bearing operates at high speed, the contact angle between the steel ball and the radial plane of the raceway will be affected by the centrifugal force, which will cause the steel ball to slide relative to the raceway. Adhesive wear from this sliding can damage the bearing.