Selecting an EDM Electrode Material

(Selecting an EDM Electrode Material)

Electrode material plays a key role in EDM machining. Several factors need to be considered when selecting an electrode. The first is the material itself.

The most common electrode materials used in EDM applications are graphite and copper. Graphite is the most commonly used material in the United States, while copper is the most popular in Europe. It is important to understand the difference between the two types of electrodes.

Graphite is a non-metallic material with excellent electrical conductivity. It also has good machinability and thermal properties. It is available in many grades. However, a high-grade graphite can be costly, while a lower-grade grade can be more economical.

For the most part, the best finish results are obtained when an electrode has a combination of materials. For example, a premium grade electrode can be made from a graphite and a tungsten alloy. In addition to the quality of the materials, the machining process will need to be carefully planned.

Another consideration is the cost of the electrode material. This will vary depending on the machining process. There are many variables to consider when determining the true cost of an electrode.

A good EDM electrode material should be low cost, with a high melting point and good machinability. Aside from these characteristics, an electrode should have a high electrical conductivity.

A metallic EDM electrode is usually a copper or brass. They are not used for very detailed work, and have a lower cut speed.

(Selecting an EDM Electrode Material)