<p>Two coupled part components such as bearings or connecting rods have a wide application in mechanical systems. The performance, efficiency, and durability of these components depend on the tolerances and surface quality obtained after being manufactured. One of the main problems that two coupled part components usually present is the appearance of discontinuities in their union interface, affecting the machining that will be performed in their interior housing once the assembly is carried out. In this work, the effect of pressure distribution for different tightening torque values applied in the two coupled part elements is studied, using the finite element method with non-linear contact elements and a matrix method of simplifying the model based in deformation energy. The latter is based on obtaining the distribution of contact forces through the conditions of Kuhn-Tücker and the method of Lagrange multipliers, which allows knowing what effects occur in the contact area. Subsequently, an experimental boring study has been carried out where the cutting forces are measured and the power spectrum is analyzed to determine if there are disturbances that can affect the roundness and quality surface of the manufactured component, and consequently, to a possible anomalous operation of the mechanical system in which the bi-components will be mounted.</p>