Electrical discharge machining

Wire and sink erosion

Electrical discharge machining (EDM), also called electro-erosion, spark machining, wire erosion or sink erosion, is a manufacturing process by which material is removed from the work piece through electrical current. The process enables machining of hardened steel, tungsten and steel carbides. EDM therefore is widely applied for precision tooling and mold-making, while wire erosion is becoming an increasingly common method for prototyping and small series production.


Tooling, prototyping and small production runs

Precision machining

CGR manufactures tools, prototypes and small series using EDM. Our specialist machining production units use wire EDM and sinker EDM, as well as rapid hole drilling EDM. Materials include steel, aluminium, carbide, chromium, cobalt, copper, graphite, Inconel, stainless steel, titanium and alloys. Wire diameters range from 0.07mm to 0.33mm. The main applications are prototyping and small series production for the aerospace, automotive and electrical engineering industries.

EDM machining in action

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