Electrical Discharge Machining

Electrical discharge machining is a highly precise manufacturing process that uses electricity to remove materials from the workpiece instead of a cutting tool. In fact, the workpiece isn’t touched by a tool at all. Instead, a high-frequency electrical charge disintegrates the material molecule by molecule to make a sharp cut. During the electrical discharge machining process, an electrode made of copper, brass, graphite, or tungsten is brought within a hair’s width of the electrically conductive workpiece to be machined. Then, the voltage between the electrode and the work piece is increased until an electrical discharge, or spark, occurs.