American Machinist

Modular tools improve turning.

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A change in a toolholding system at a major automotive transmission-parts plant resulted in a 66% reduction in nonconforming parts, and permitted the plant to maintain production of hundreds of parts a day with fewer machines. And in an unusual twist, a modular toolholding system was effectively put to use in this dedicated environment.

A transmission-parts plant of a major automaker in Flint, Mich, operates a bank of five 30-hp Olofsson Model 75 CNC three-spindle vertical turning machines for the first operation on a cast-steel reaction carrier. In the operation, the Olofssons are manually loaded and during the machining cycle, the ID, OD, bearing face, top edge, and a chamfer are produced to tolerances of [+ or -]0. …

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