Copper

Copper EDM electrode tubes

Copper electrodes/tubs are commonly used for small hole drilling (low speed or high speed EDM drilling) in almost all types of materials.

The unique characteristic of copper along with its molecular composition, thermal conductivity, corrosion resistance and high electrical conductivity is that you have the ability to drill through very hard materials such as: hard metal alloys, carbide, stainless steel, tungsten, tungsten carbide …