| Electrical Discharge Machining (EDM) is ideal for burr-free cutting of intricate contours or cavities in hard materials, eliminating the need to soften the material before machining, and then re-harden it through heat-treating. The process can be used with stainless steel or other electrically conductive materials including titanium, Hastelloy®, Inconel®, nitinol and Kovar®.
Also called "spark machining," "spark eroding," "burning," "die sinking," and "wire erosion," the process uses electrical discharges between an electrode (the cutting tool) and the work piece, both immersed in a
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dielectric liquid to remove material from the part.
EDM offers consistent results and is particularly suited for parts requiring tight tolerances. Extra fine surface finishes can be obtained and near-perfect perpendicularity achieved using EDM.
MicroGroup has proprietary fixtures, which permit the cutting of extremely small diameters (down to Ø0.001") and to very short lengths (<0.005"). EDM cutting can produce edges with minimal edge break which may be desired for welding or other joining applications.
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