EDM & Tooling

Premium EDM graphite electrodes with fine grain structure for precision die-sink and wire-cut operations.

Die-sink EDM electrodes Injection mould tooling Fine-feature micro-EDM Jigs & fixtures Copper-graphite composites

3–5×

Faster than copper

0.01%

Min. wear ratio (finishing)

±0.005mm

Achievable tolerance

Graphite solutions for EDM & Tooling

Graphite electrodes have displaced copper in over 70% of EDM applications globally — and for good reason. Graphite machines 3–5× faster than copper, tolerates higher discharge energies, and delivers lower wear ratios in finishing operations when the correct grade is selected. For deep ribs, thin walls, and complex 3D cavity profiles, graphite is the only practical material.

Expo supplies EDM graphite blocks and precision machined electrodes in all grades — from standard ISO-63 for roughing to ultra-fine ETP-10 for mirror-finish micro-EDM — with in-house machining to your DXF or STEP drawings and ±0.005 mm dimensional accuracy.

Why Expo for EDM & Tooling

✓ All EDM grades in stock — ISO-63, fine grain, ultra-fine (ETP-10)

✓ In-house electrode machining to customer drawings

✓ Custom block sizes up to 600 × 400 × 300 mm

✓ Experienced team — grade recommendation included at no charge

Where we supply

Key applications in EDM & Tooling

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Cavity Sinking EDM

Roughing, semi-finishing, and finishing electrodes for mould and die cavity sinking. Grade selected by required surface finish and electrode geometry.

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Die Casting Tooling

Graphite dies, cores, and inserts for non-ferrous die casting of zinc, aluminium, and magnesium alloys.

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Sintering Dies & Moulds

Hot-press and SPS sintering tooling in isostatic graphite for powder metallurgy and ceramic sintering.

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Micro-EDM

Ultra-fine grain graphite electrodes (grain size <2 μm) for precision micro-EDM machining of miniature features.

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Extrusion Tooling

Graphite extrusion mandrels and dies for non-ferrous metal and glass extrusion.

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Wire EDM Fixtures

Graphite fixture plates and tooling for wire EDM clamping and positioning of complex workpieces.

Technical reference

Typical specifications

Application	EDM cavity sinking; sintering dies; die casting
Grade (roughing)	ISO-63 — grain 8–15 μm, fast machining
Grade (finishing)	Fine grain 4–8 μm — lower wear ratio
Grade (micro-EDM)	ETP-10 — ultra-fine grain <2 μm
Minimum wear ratio	0.01% (ETP-10 finishing conditions)
Surface finish achievable	Ra 0.3 μm (VDI 12) with ultra-fine grade
Max block size available	600 × 400 × 300 mm
Machining tolerance	±0.005 mm on electrodes