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A face gear manufacturing operation wherein a set of oversized teeth are formed on a face gear or tapered pinion gear by a gear cutting operation. The oversized teeth are of a predetermined profile. The gear bearing the oversize teeth is then subjected to metallurgical surface hardening operation. A

A face gear manufacturing operation wherein a set of oversized teeth are formed on a face gear or tapered pinion gear by a gear cutting operation. The oversized teeth are of a predetermined profile. The gear bearing the oversize teeth is then subjected to metallurgical surface hardening operation. At the conclusion of the heat treatment surface hardening operation, the face gear or pinion gear is subjected to a continuous grinding operation wherein a grinding wheel having a worm profile of a predetermined shape is rotated to grind the previously cut teeth to produce a finished tooth profile. The operation is CNC controlled. The gear producing apparatus requires only a slight modification to produce a face gear or a tapered pinion gear by the simple interchange of work heads.

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1. A precision grinding apparatus for grinding face gears comprising:suitable gear table means being controllably driven for rotation about a central axis (B), said gear table means also being movable in a vertical plane along a (W) axis in a second controlled manner, a cased hardened face mounted o

1. A precision grinding apparatus for grinding face gears comprising:suitable gear table means being controllably driven for rotation about a central axis (B), said gear table means also being movable in a vertical plane along a (W) axis in a second controlled manner, a cased hardened face mounted on said gear table means, said face gear having a series of gear teeth formed therein, a grinding wheel mounted on said apparatus having a third controlled driven rotation about a central (C) axis, said grinding wheel being provided with a grinding surface of a predetermined shape in the form of a worm for meshing with and grinding the gear teeth existing on said gear to a predetermined finished shape, said grinding wheel being movable in a fourth controlled manner toward and away from said gear along a feed (V) axis, wherein motion of said grinding wheel in said (C) and (V) axes and movement of said gear in said (B) and (W) axes is controlled by a central control means.