Hebei MotoMachinery famous high speed thread rolling machine

When two or three dies are used, they must be matched so that the helical path produced by one die is a continuation of the one produced by the other die or dies. Conversely, there will be steps in the product thread. Dies are matched by rotating one or more dies in relation to the others, or by moving one or more dies axially, to produce a continuous helix on the workpiece.