The Helixform process is a recent development in the art of gear cutting. Gears made by this method are classified as nongenerated which means that the workpiece remains at rest while the teeth are being cut. Cutting the gear without generation is a process especially adapted to high production and accurate machining and is the method used to manufacture most automotive spiral bevel and hypoid gears. Pinions which match nongenerated gears are of course produced with generating motion, that is, the tools cutting the teeth of the pinion are mounted on a machine element which, while the teeth are being cut, turns in concord with the turning of the pinion on its axis.

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