Justification of the type of fit depending on the type of loading and radial clearance in rolling bearings

Abstract

The main cause of failures occurring during the operation of machines is the failure of bearings, the failure of even one lead to the loss of performance of the entire mechanism. The most common are rolling bearings, which have the following advantages: provide more accurate centering of the shaft; have a lower coefficient of friction; have small axial dimensions. One of the most significant factors determining the durability of a bearing is the value of the radial clearance formed in the bearing in its operating condition, which in the same bearings can change dramatically depending on the conditions of their assembly, the fit of the rings on the shaft and in the housing, as well as on the magnitude of the workload. This clearance has a significant effect on the distribution of the load acting on the bearing between its rolling elements, so it is very important to make the right choice already at the design stage.