Thread rolling & Flat Die Thread Rolling

Thread rolling

Thread rolling uses two flat jaws to produce the thread. One rolling jaw is fixed, while the other is moved by a crank mechanism back and forth

This nonmachining process means that the fibre of the material is not interrupted, solidifying the thread flanks. This increases the strength of the products, which is an additional advantage of nonmaching processes.

This process is fully automated. At PRINZ, a wide variety of thread designs can be rolled with a usable thread length of up to 230 mm.

Flat Die Thread Rolling

When flat die thread rolling, the thread is made by two rotating rollers, using either a in-feed or through-feed process. This allows very long threads and parts without heads to be produced. Flat die thread rolling means that as well as classic threads, knurls, grooves, notches and special profiles are also economically feasible. We also use them for processing headless parts in both the in-feed and through-feed processes:

When using the in-feed process, the tool rollers driven at the same speed have the same direction of rotation. The workpiece rotates without moving axially. This method allows threads with high pitch accuracy to be produced.

In the through-feed process,the thread pitch is generated by tilting the roller axes by the pitch angle. The workpiece receives an axial thrust and moves a full rotation with the thread pitch in the axial direction. This method is especially recommended for overlong threads.