Electrical Discharge Machining (EDM) is a technology, which removes the material by small electrical discharges. Either a shaping electrode from copper or graphite (electro spark sinking) or a brass wire (electro spark cutting) can be the tool. The main benefit of this technology is the possibility to machine very hard materials with high accuracy and surface quality. This kind of machining with support of CNC management enables to create very complicated shapes. Our tool shop is equipped with the Agiecut 250 HSS wire cutter and the Charmilles Roboform 31 sinking machine.