A highly important research issue in this modern world is stress on the connecting shaft when a rotational velocity is applied to one of the gears connected to the shaft. This project aims on finding the variation in stress, deformation, and fatigue when two different rotational velocities are acted on the gear. The finite element analysis method takes at one place a single complicated shape with an approximately equivalent network of simple elements. The overall pattern of elements is referred to as a finite element mesh. For the solution to be uniquely defined the boundary conditions are to be specified. In the given project an end of the shaft is fixed to get the deformation of the assembly after rotational velocity is applied. The components were modeled and assembled in FUSION 360 and the analysis was done in ANSYS software workbench interface.