Electrodes are used in electrical discharge machining (EDM) for manufacturing desired shapes from metal that can't be used with traditional machining techniques. In an EDM machine, a series of rapidly recurring current discharges between two electrodes, the tool-electrode and the workpiece-electrode, creates tiny plasmas zones that melt and remove material.

At McWilliams Sales & Service, we supply customers with high-performance EDM consumables, including single-hole and multi-hole brass and copper electrodes. Contact us to learn how we can supply your EDM electrodes and more.

EDM Electrode Materials

Electrodes in an EDM machine consist of highly conductive and/or arc erosion-resistant materials such as graphite or copper. They can be rods or tubes, multi-channel or single hole, and can vary along all dimensions.
Electrodes for small-hole EDM machines, or "hole poppers," typically are either brass or copper and are used to make a hole in the material. The type of hole varies by electrode. They can either be a single-hole diameter with no other internal walls or a multi-channel type internal hole with multiple walls throughout the length of the electrode.

Single Vs. Multi-Channel EDM Electrodes

One main variation between electrode types is whether they are a single-hole diameter or a multi-channel electrode. An electrode's intended performance depends on the type of hole going through the center of the electrode, as different channel types are made for different purposes.

Single-Hole EDM Electrodes

A single-hole electrode is named for its singular, empty hole diameter. There are no other internal walls within the electrode. They are used primarily for hole-burning applications that require a hole to be drilled entirely through a part or material. Because they do not use any internal wall, they require less material to make and are usually less expensive.

Multi-Channel EDM Electrodes

Multi-channel electrodes are designed with internal channels to drill blind holes and burn away excess material at the bottom of the hole. Because of the internal walls, as the electrode spins, it affects every part of the workpiece, leaving no material at the bottom. Multi-hole electrodes come in several variations. These include:
  • Two- and Three-Channel: Depending on the electrode size, a different number of channels will be needed for greater structural integrity. If the external diameter is larger, it will have three channels.
  • Wire Inserts: These are inserted into single-hole electrodes to make them function similar to a two or three-channel electrode. They burn away more material than a single channel.
  • Y-Type and Web-Type Electrodes: These electrodes are similar to the two and three-channel electrodes in purpose and design, but they use less material and more flushing.

Get EDM Electrodes & Other EDM Consumables from McWilliams

Are you looking for a supplier for your EDM electrodes and other EDM consumables? McWilliams Sales & Service is your solution. Our wide selection of EDM consumables includes electrodes, carbide contacts, wire tools, and more. We buy and sell used EDMs, meaning you can find the best deals on reconditioned EDMs, small hole EDMs, and more. With EDM tool repair services, operation consultation, and other custom services, we are your one-stop source for your EDM needs.

Advantages of Choosing McWilliams for Your EDM Resources

  • Support from experienced and knowledgeable EDM professionals
  • Competitive pricing and exclusive deals on a range of EDMs and related products
  • Personalized EDM services
  • Efficient order processing and quick turnaround
  • A broad selection of both new and used EDM machines

Contact Us to Order EDM Electrodes

McWilliams Sales & Service is your source for quality EDM equipment, parts, and consumables. We can supply all of your EDM consumables for all makes and models to meet your application needs. Contact us to learn how we can be your one-source supplier for EDM electrodes and more. For pricing information, request a quote online. Discover the benefits of choosing McWilliams for your EDM resources.

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PO Box 4509 • Mooresville, NC 28117
8192 Boardwalk Rd. • Brighton, MI 48116
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