The present invention relates to a method for the production of shapings on the circumference of the die, by synchronizing the operations of cold hobbing, and CNC milling and turning. This method involves the construction, at the outside of the effigy of the working punch, of reference systems (in negative) and a groove (in negative) along a generatrix thereof. The working punch slides in a retaining sleeve provided with a tooth (positive) such as to perfectly matching with said groove. Both the working punch and the retaining sleeve, once keyed to one another are positioned along a reference axis of the press and in the upper position to the tip to be punched.
Once the hobbing occurred, the resulting "barrel tip" of the die presents on the effigy the reference systems (positive) in the neighborhood of the effigy. On the spindle of the CNC lathe, a coupling element provided with reference counter-reliefs (in negative) is keyed in axis with the lathe itself. Therefore, the operator of the CNC lathe ensures the flatness of the "barrel tip" by engaging the reference systems while the axiality is ensured at the closure of the terminals of the spindle, and this allows the working in registry of the die.