GRAPHITE IS THE PREFERRED ELECTRODE MATERIAL FOR 90% OF ALL SINKER EDM APPLICATIONS.
GLOBAL EDM SUPPLIES, INC. offers graphite materials from the world's leading graphite manufacturers.
GLOBAL EDM SUPPLIES, INC. is the full-service source for all of your EDM graphite requirements.
Advantages of Graphite over Copper
SPEED: Graphite is Faster than copper in both roughing and finishing, usually by a factor of 2:1
WEAR: Graphite wears less than copper
SURFACE FINISH: With new additives in dielectric and new EDM power supply electronics, graphite finishes are very close to copper! But in most cases the surface finish required is easily achieved with graphite
MACHINABLITIY: Graphite machines an order of magnitude faster than copper and can also have more detail easily machined into it. Graphite doesn't have to be de-burred like any metallic does, further reducing electrode fabrication costs
MATERIAL COST: Graphite is usually less expensive than metallics