The most of companies wish to decrease maintenance and have the same target with low weight and no friction even costs much money, when a machine is built. Using flexural(also flexure) hinges in a system, at least, leads to all of that advantages. We have a planar mechanical system consisted of seven and six bar mechanism, with revolute joints, after that we replace each revolute joint with super elastic hinge. Doing so we have a gate to build a system, strongly recommended, to achieve the same goal using minimum energy. The main purpose of this paper is to elaborate a mathematical apparatus able to estimate the deviations of the considered system before and after replacing revolute joints taking into account the real performance of the new system through large bending displacements in the flexure (flexural) hinges.