Top Notch EDM Services specializes in Electrical Discharge Machining, offering Plunge and Wire EDM services capable of producing fine detail and close dimensional tolerances to produce intricate cavities (notches) and irregular shapes in hard to reach locations such as the ID of piping and tubing. It is also very effective for machining harder materials such as the new high strength steels and exotic alloys.
Plunge EDM (also known as Sink EDM or Ram EDM) employs a process using custom machined electrodes (typically made from copper, graphite, or tungsten) which creates a spark between the material being machined and the electrode. The spark erodes materials in the EDM tools pathway, creating the complex cavities or shapes desired.
In Wire EDM (or wire-cut EDM), a thin single-strand metal wire is fed through the work piece, typically occurring while in a submerged tank of dielectric fluid or deionized water. This fluid helps to cool the process and flush away the cut material. The wire EDM process uses electric current to cut conductive materials leaving a smooth surface that requires no further finishing or polishing.