Since many decades thread rolling machines with Planetary thread rolling dies with their universal workpiece range are most productive machine tools for coldforming especially for rolling of headed screws.
This process is also usable for workpieces with higher tensile strength or for special nails. Even bigger dimensions for this 100% grinded dies can be ordered.
A big challenge is always grinding of outer segment dies. Their different radius designs on one hand is needed for feed on the other hand for forming of thread.
