Abstract: A system and method for forming a feature on an inner surface of a gear includes a sensor for sensing the position of a feature on the gear, a cutting station having a cutting tool for forming the feature on the inner surface of the gear, and a controller. The controller is operable to determine an amount of rotation necessary to rotate either the gear or the cutting tool such that the feature on the inner surface of the gear is formed at a desired orientation relative to the feature on the outer surface of the gear.

Abstract: The equal-pitch groove processing device (1) comprises transferring means (10), (40) for continuously transferring a workpiece (100) in an axial direction of the workpiece (100); processing tools (23), (33) in which cutting teeth (23a) of a thickness corresponding to a width of a groove to be processed are formed around an outer peripheral portion along a spiral path, and which is rotatively driven with the center of that spiral as an axis; and controlling means (70), (80) for synchronously operating the processing tools (23), (33) in such a manner that the workpiece (100) is transferred by a one-normal-pitch portion of the spiral while the processing tools (23), (33) undergo one revolution, whereby equal-pitch grooves are formed in the workpiece (100) by the cutting teeth (23a) of the processing tools (23), (33).