Abstract: A gear finishing machine having a rotary work gear support and a rotary honing tool support and a pivot mounting for one of the supports whose pivot axis extends parallel to the rotation axis of the rotary support mounted thereon, the pivot axis being located substantially within the angle between the lines of action of a meshing gear and gear-like hone carried by the supports. In a preferred embodiment the construction is provided in a pivoted tool support head provided with means for fixing the head against pivotal movement for use in gear shaving, or releasing it for limited pivoting movement for use in gear honing.

Abstract: Pot broach rings having the trailing side specially modified to provide for regrinding both on the face and I.D. without producing a rearwardly facing interference shoulder in assembly.

Abstract: A shaving cutter having a circular array of teeth of the same number and approximate size as that of a gear to be shaved, and having cutting edges at one end of the teeth of identical profile as that to be formed on the gear teeth, the teeth of the cutter being backed off to provide cutting clearance and dimensioned to be received simultaneously in all of the tooth spaces of the gear with circumferential clearance. Relative reciprocation is provided with timed relative circumferential depth feed to shave first one side and then the other of the gear teeth. The teeth are provided with cutting edges occupying different planes to avoid having all teeth initiate cutting action at the same time.