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Installation of industrial bearings is very important

wallpapers Tech 2021-03-01

Dr. Li of Wuxi Spark Bearing Co., Ltd believes that the installation of industrial bearings is very important. The correct installation of bearings can not only increase the service life of the bearings, reduce costs, but also greatly improve production efficiency.

The fit between the bearing and the shaft is generally a transition fit, and the fit between the seat ring and the bearing housing hole is generally a clearance fit. The center washer of the double bearing should be fixed on the shaft to prevent rotation relative to the shaft. The installation method of the bearing is generally the case where the shaft rotates, so the fit between the inner ring and the shaft is an interference fit, and the fit between the bearing outer ring and the bearing chamber is a clearance fit.

When installing the bearing, first fix the dial indicator to the end face of the case, so that the contact of the meter is on the bearing ring raceway, and rotate the bearing. Watch the dial indicator while rotating. The axis centerline is not vertical. If the case shell hole is deep, you can also use the extended dial indicator. This is a good way to check the perpendicularity of the shaft ring and the centerline of the shaft.

The bearing installation is reversed, not only the bearing works abnormally, but also the mating surfaces will be severely worn. Since the difference between the shaft ring and the seat ring is not obvious, special care should be taken during assembly, and it cannot be reversed.

When the installation is correct, the seat ring can automatically adapt to the rolling of the rolling body, and ensure that the rolling body is located on the upper and lower ring raceways. In addition, a clearance of 0.2-0.5mm should be left between the bearing race and the bearing housing hole to compensate for the errors caused by the inaccurate machining and installation of the parts. When the center of the bearing ring shifts during operation, This gap ensures that it adjusts automatically to avoid touching friction and allow it to run normally. Otherwise, it will cause severe damage to the bearing.


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Tag: bearings