The goal of this thesis is to analyze the function of the wire bending machine, and the measurement of the surface Roughness of the tooth gears within the machine. The study begins with disassemblage of the machine to the maximum possible parts to understand the complexity of the machine. Then each component is measured precisely. The next step was modelling the machine in a CAD software (Catia) for better visualization, and to be ready for future tests. A Surface Roughness measurement is then performed specifically on the teeth of the gear pair to investigate the accuracy of the manufacturing process and the geometric establishment of the profiles. Finally, Finite Element Analysis of connecting spur gear pair as a part of the machine, to describe the deformation of the gears during operation.