Evaluation of the Deflections of Radial Rolling Bearings by Nomograms

Calculation of rolling bearing deflections is essential in the design of machine tools to ensure their high rigidity. To avoid lengthy calculations the process of evaluating the rolling bearing deflections is commonly simplified, at the expense of accuracy, by making the assumption of zero clearance. This is because the deflection of rolling bearings with play or preload are usually calculated by solving a system of simultaneous non-linear equations using an iterative precess. This is a time consuming and laborious process. The convergence also depends on the initial choice of the variables. To save time and to avoid lengthy iterative process a set of nomograms for radial ball and roller bearings has been prepared. The deflections of radial rolling bearings with play or preload can be found easily and quickly by using the nomograms presented in this paper. The paper also shows the effect of the different variables on the deflection of radial rolling bearings, which gives a clear idea about the choice of the best possible operating conditions of the bearings.