Forbes Precision also offers Wire EDM services. Our Mitsubishi Wire EDM or Electrical Discharge Machine is ideal for cutting intricate shapes, narrow slots or shapes with a tight corner radius. We are able to hold tolerances up to .00005. Wire Electrical Discharge Machining is a non-contact, force-free industrial cutting process. In wire EDM, an electrical spark is used to cut different types of electrically-conductive materials, such as aluminum, brass, carbide, copper, graphite, steel and titanium. Since the Wire EDM process eliminates burrs and metal distortions that you find with other types of cutting machines, we can produce a fine surface finish down to 8 micro inches.