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Belleville springs can sustain relatively large loads with small deflections and belleville spring washers are especially suited for high loads in small places. Belleville springs are used singly or in stacks to achieve desired load such as power transmission components. The aim of this paper is to design for the belleville spring diameter and thickness to minimize volume of the system. The design is carried out using finding solution in a commercial spreadsheet application software, Microsoft Excel 2007. The numerical results are obtained where the displacement, stress and load in the spring are treated as constraints function.