Process for machining a worm-type workpiece with a worm-type tool

A process for machining a threaded-type workpiece with a threaded-type tool wherein said workpiece has a thread profile with a cylindrical head area, profile flanks and a cylindrical profile surface between opposed flanks having a given width and said tool has a thread profile with a profile head having a width less than the width of the cylindrical profile surface between opposed flanks on said workpiece each of said workpiece and tool having a given axial length, comprising rotating said workpiece and tool while radially moving said tool toward and away from said workpiece whereby the relationship of the rotating speeds corresponds with a basic turning speed relationship resulting from a relationship of the pitches of the workpiece and tool, moving said tool into contact with said workpiece with a combing action whereby the number of contact points is a function of the pitch of the workpiece and the length of the workpiece and tool, said contact points at any given time being located upon the same radius and the same sections of an axial section gear profile of said workpiece, and additionally moving said tool axially relative to said workpiece, which movement is based on the adial movements of the tool as well as various profile corrections, so as to displace said contact points such that the desired threaded profile is produced upon the workpiece.