Research and development of CNC machine tools. Tool for horizontal layout, a fully enclosed protection device. Artifacts points And feed movement using three axis nc linkage difference principle. Three nc axes X, Y, The Z axis, X, Y in the feed systems for the two axis, dividing the Z axis is workpiece axis. In the continuous rotation of workpieces At the same time, X, Y, Z axis by program control along the tooth profile of gear double-sided cutting operation at the same time To realize the gear chamfering. The machine adopts the clip-on alloy machine tool, easy to operate, stable performance, wide applicable scope, Low failure rate, high efficiency, etc. Widely used in automobiles, motorcycles, agricultural machinery Industry transmission shift gear disc of gear, gear ring of the outer and inner tooth.