Wirecut EDM ( Electrical Discharge Machining ) is a thermal machining process Sparks Discharged from a small-diameter , tensioned wire erode the workpiece without any contact between the tool and the part produced.

This process also called traveling-wire EDM,produces a straight, narrow-kerf cut, the slowly moving wire brings a fresh,constant diameter electrode to the cutting gap. Thereby enhancing kerf,size control, usually a programmed or numerically controlled motion guide the cutting, while the width of the kerf is maintained as a constant by the wire size and setting on the spark discharge controls.

The dielectric is deionozed water under pressure,introduced concentric nozzles at the top and bottom of the workpiece. In a wirecut EDM system, the wire feeds from a spool,travels over tension roller,along upper and lower guides,over electrical contacts and into a takeup reel. Note that the EDM wire must be threaded through a starter hole in the workpiece. These holes are normally created for the wire by drilling before part are hardened.