... heat treating all kinds of hardware tools, electrical, hydraulic, pneumatic components, steam, motorcycle and other mechanical parts of the metal ... total quenching. Such as: hammers, knives, scissors, pliers and all kinds of shafts, cams, sprockets, gears, valves, ball stud, large ... metal smelting: Smelting gold, silver and copper.5, the other heated areas of plastic pipes, cables, heating wires ...