According to the theory of spring design, equal step cone screw press springs were designed and calculated by using MathCAD and technology of composed stiffness.

This paper presents a geometric model description methods of the cone gear for final driver of automobile driving axle system based on STEP, and establishes application protocol (ZCAP).

Step Four: along the dotted lines of paper mask edges with a small cone or a thumb tack in the pumpkin skin delineate Facebook. Completed, remove the paper mask.