The EDM process is the use of electricity to turn hardened material into plasmatic particles that are carried away in the dielectric oil or deionized water as it cools and returns to it hardened state. These particles once filtered out leave behind the desired hole, cavity, or desired geometry. EDM is used to create details that cannot be produced internally, externally, or with sharp inside corners by traditional methods.

The three types of EDM are Wire EDM (WEDM), Die Sinker EDM (SEDM), and EDM Hole Drilling.

Wire EDM (WEDM) is used in metal stamping dies as well as plastic, silicone and die cast molds for sharp corner detail, complex parting lines, and inserted details. The wire element is used in band saw fashion to pass electricity creating a kerf. At Apex, an extensive stock of EDM Consumables is available. Apex features the best brands of wire, filters, deionized resin, and replacement parts in the industry.

Sink EDM (Die Sink/ SEDM) is the use of graphite or copper 3-dimensional electrodes to erode the desired shape and finish in steel to produce a core or cavity detail. Apex provides the dielectric oils, tooling, and filtration products to fit your machines.

EDM Hole Drilling uses a tubular electrode to create a burr free hole in a drill-like application. This process is also known as High-Speed EDM Drilling. EDM Hole Drilling machines are used to create vents in plastic injection molds, turbine blades, fuel injectors, and medical parts. Apex has a complete inventory of copper and brass single hole and multi-channel electrodes, seals, guides, Vytol-like additives, and replacement chucks.