Manufacture custom tools used in factories and plants.
Tends closed-die power press that produces metal forgings: Pulls workpiece from furnace, when color of workpiece indicates forging temperature, and positions it on lower die, using tongs. Moves controls to lower ram that compresses metal to shape of die impressions. May move workpiece through series of dies for progressively finer detail. May tend press to emboss designs on metal or compress and smooth surface of metal blanks or rough forgings and be designated Coining-Press Operator. May tend press that twists forging to form journals and counterweights on crankshafts to specified degree of eccentricity and be designated Twisting-Press Operator.