Engineering Resource
Graphite cuts easily and punishes its surroundings. The cutting is rarely the hard part — the conductive, abrasive dust is.
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.