Engineering Resource

What graphite is used for

Industrial graphite is available in grades from fine-grain to isostatically pressed, with purity and grain size selected for the job. Its combination of electrical and thermal conductivity, chemical inertness and high-temperature stability in inert atmosphere makes it valuable as EDM electrode material in mould and die work, and as a structural material in semiconductor crystal growth, ion implantation, high-temperature furnaces and vacuum equipment.

What makes it special

• Conductive dust: graphite powder can short electronics and contaminate machine components.
• Abrasive dust: the same powder wears guideways, seals and tooling.
• Chipping: edges break out rather than burnishing, so tool paths are planned for edge quality.
• No coolant habit: water-based coolant leaves residue and risks contamination, so machining is typically dry.

Process controls that work

Dedicated extraction that removes dust at the source; machine protection so particles never reach guideways or drives; sharp, wear-resistant tooling with a controlled tool-life limit; and feeds chosen to leave edges clean rather than to maximise removal rate.

Verifying graphite parts

Dimensional checks on a CMM confirm that electrode geometry and precision features are within tolerance, and edge condition is inspected as part of the same process — because a graphite part that measures true and chips at the edge will not perform as an electrode.