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...such as making screws, and it presaged the momentous developments of the 20th century. Various gear-cutting machines reached their full development in 1896 when F.W. Fellows, an American, designed a gear shaper that could rapidly turn out almost any type of gear.
in machine tool: Gear-cutting machines )...rack blank. This principle is applied in the design of a number of widely used gear-cutting machines of the generating type. Gear-generating machines that cut with reciprocating strokes are called gear shapers.
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