Precision EDM Machining Services
Controlled electrical sparks for hard metals and complex geometries — deep cavities, sharp internal corners, and fragile features traditional cutting tools cannot achieve.
15+ years precision manufacturing · Shipped to 30+ countries
How We Help
Electrical Discharge Machining (EDM) removes material with controlled electrical sparks. It is ideal for hard metals and complex geometries — deep cavities, sharp internal corners, and fragile features that traditional cutting tools cannot achieve.
We provide sinker EDM, wire EDM (fast / medium / slow), and small-hole EDM under one roof. Every job includes engineering review for electrode strategy, wire path, and finish requirements so you get accurate, burr-free parts ready for assembly or mold tryout.
Not Sure Your Design Is Optimized?
Upload your STEP file — an engineer responds within 24 hours with a quote and free DFM manufacturability review.
Why Choose Us for EDM
EDM & Wire EDM Technical Specifications View full specs
| Parameter | Specification |
|---|---|
| Sinker EDM | Min feature 0.10 mm · Tol. ±0.003–0.005 mm · Ra 0.1–0.4 µm · Deep cavities, blind holes, textured surfaces |
| Fast Wire EDM | Up to 1500 mm height · Kerf 0.20 mm · Tol. ±0.015–0.020 mm · Ra 1.6–3.2 µm · Cost-sensitive / rough cutting |
| Medium Wire EDM | Up to 360 mm thickness · Kerf 0.18 mm · Tol. ±0.004–0.005 mm · Ra 0.65–0.80 µm · Mold tooling & production |
| Slow Wire EDM | Up to 1150 × 810 × 300 mm · Kerf 0.15 mm · Tol. ±0.002–0.005 mm · Ra 0.1–0.40 µm · High-precision / mirror finish |
| Small-Hole EDM | Up to 300 mm thickness · Hole Φ0.1–0.30 mm · Tol. ±0.004–0.005 mm · Ra 0.3–0.4 µm · Cooling & injector holes |
From Drawing to Delivery
A transparent, engineer-led workflow — reducing risk at every stage of your supply chain.
- 01
Upload Drawings & NDA
Submit STEP, IGES, or PDF via our secure form. Mutual NDA available — your IP is never shared.
- 02
Engineer Review & DFM
A senior engineer reviews tolerances, materials, and process — quote + free DFM feedback within 24 hours.
- 03
Production & In-Process QC
Self-owned factory with in-process inspection on critical dimensions. Progress photos available on request.
- 04
Final Inspection & Global Ship
Optional CMM reports, material certs, and CoC included. DHL/FedEx/sea freight with full tracking.
Key Equipment
- Sinker EDM machines for cavities and textured surfaces
- Fast / medium / slow wire EDM platforms
- Small-hole EDM drills (Φ0.1–0.30 mm)
- In-house electrode machining capability
- CMM and optical inspection for critical features
Quality & Certifications
Verifiable quality systems — supporting your vendor audits and incoming inspection.
Materials & Processes
Materials
- Steels: tool steel, stainless 304/316, hardened steel
- Non-ferrous: aluminum, brass, bronze, copper
- Exotic alloys: titanium, Inconel, carbide, Hastelloy
- Note: EDM is often the only practical way to machine hardened steels and carbide after heat treatment
Processes
- Sinker (die-sinking) EDM
- Fast / medium / slow wire EDM
- Small-hole EDM drilling
- Electrode design & manufacturing
- Post-EDM finishing & inspection
EDM Capabilities
Sinker EDM
Complex cavities, ribs, blind holes, and textured surfaces — including features unreachable by milling cutters.
Wire EDM
Tight-tolerance through-cuts, extrusions, punch tools, and precision profiles in hardened materials.
Small-Hole EDM
Fast, burr-free drilling of cooling holes, start holes, fuel injector nozzles, and turbine blade holes.
Advantages of EDM
- Complex geometries with no tool interference — deep ribs, sharp internal corners, thin walls, high aspect ratios, burr-free
- High precision: typical ±0.005–0.025 mm; high-end machines ±0.002–0.005 mm for aerospace, medical, and mold tooling
- Superior surface finish: Ra as low as 0.1–0.40 µm on finish passes, often eliminating grinding or polishing
- No mechanical stress or deformation — non-contact process ideal for fragile parts and delicate features
- Any electrically conductive material at any hardness — tungsten carbide, Inconel, titanium, hardened steel, Stellite
- Burr-free edges that reduce or eliminate manual deburring
Why Engineers Worldwide Trust Unique Prototype Technology
Experience, expertise, authority, and trustworthiness — four pillars behind every part we ship.
Ready to Start Your Project?
Dedicated project manager · NDA on request · FAI reports available on first articles.
Related Resources
Frequently Asked Questions
What materials can EDM machine?
Any electrically conductive material — steels (including hardened), stainless, aluminum, brass, copper, titanium, Inconel, carbide, Hastelloy, and more. Plastics, ceramics, and glass cannot be EDMed.
When should I choose EDM instead of CNC milling?
Choose EDM for hardened materials after heat treatment, sharp internal corners, deep narrow cavities, thin walls that deflect under cutting forces, micro holes, and features where conventional tools cannot reach.
What tolerances and surface finishes can you achieve?
Slow wire EDM typically holds ±0.002–0.005 mm with Ra 0.1–0.40 µm. Sinker EDM commonly achieves ±0.003–0.005 mm and Ra 0.1–0.4 µm on finish passes. We match process grade (fast/medium/slow wire) to your cost and precision targets.
Are there limitations I should plan for?
EDM only works on conductive materials and is slower than milling on soft stock. Thick sections (>200 mm) reduce efficiency and may increase wire-breakage risk. A thin recast layer (about 0.001–0.005 mm) may need post-processing for critical fatigue or sealing surfaces.
Do you provide electrodes and DFM for sinker EDM?
Yes — we design and machine electrodes as needed, and review cavity geometry, draft, and finish strategy before burning starts so you avoid mid-process redesigns.
Ready to Start Your Project?
Upload your CAD files and get a competitive quote within 24 hours — with free DFM feedback.
Request a Quote