Abstract
A new mathematical technique is described to determine, from the clearance data, the optimum set of tolerances on the journal and bearing bore which guarantee the correct operating performance of plain journal bearings at a minimum manufacturing cost. The problem essentially deals with the distribution of tolerance amongst the components so that their manufacturing cost is minimized. The method of solution is based on the Lagrange multiplier technique of calculus wherein the cost, expressed as an analytical function of tolerance, is minimized subject to the mathematical constraint condition. The constraint condition is that the maximum permissible tolerance on diametral clearance must not be exceeded. A numerical example which illustrates the use of the technique is included.
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