EDM Machining is one of the most common processes of removing desired material from any work piece by inducing the electrical spark between the work piece and an electrode. Graphite has many advantages that have made it the material most widely used for EDM electrodes. Electro Tech Machining is a full service graphite machine shop – we have the latest technology and materials.  We stock the full line of EC grade materials along with metallic, precision EDM blanks and accessories for RAM and Wire type EDM machines.