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Assembly of thrust ball bearings

by:JNSN     2022-04-04
There are two key points in the assembly of thrust ball bearings. 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 after the bearing is assembled. In addition, since 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 flanged 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 solid cage is imprinted too deeply, the movement of the steel ball will be small, and the connection between the embossed convex part and the cage is too small and the strength is insufficient. There is little difference between the inner diameter of the small thrust ball bearing seat washer and the shaft washer, and there is no obvious difference between the two sets. In order to prevent the phenomenon of mixed sets, that is, a set of bearings that are assembled are trapped in the seat ring or the shaft ring. This requires certain measures. Usually, the drawing ring and the seat group are distinguished by auxiliary tooling when the sleeve is assembled, or the inner diameter size is checked with an inner diameter plug gauge before sampling the nominal height. For the convenience of checking the inner diameter, put the seat ring on the bottom and the shaft ring on the top. If the inner diameter of the seat has obvious quenching and heating oxidation color or has not been ground, it is not necessary to check the inner diameter size, and the difference between the shaft and the seat ring can be clearly seen, and it is not easy to mix. After the thrust ball bearing is assembled, the nominal height T needs to be measured to confirm that it is 100% qualified. When measuring, use a height block or a standard to calibrate and measure the load. If the bearing needs to be rotated ten times, be sure to reach the minimum height.
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