Abstract: A thread rolling machine is disclosed wherein a continuously adjustable thread means is used to adjust the relative phase timing between two thread rolling dies and the feeding of a workpiece by the feed means. This timing substantially eliminates any mismatch of thead rolling by the two dies. A double ended thread rolling machine is also disclosed with timing of the two dies relative to the feed of a workpiece accomplished at one end of a workpiece and then the continuously adjustable thread means is used to adjust the relative phase timing of the thread rolling operation on the other end of the workpiece. The above description is merely one form of the invention and is not to be construed as limiting on the scope of the invention.