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EDM Machining

EadeTech is a China-based specialty metal machining manufacturer specializing in high-performance metals, including Titanium alloys, Nickel superalloys, Tantalum, Niobium, Tungsten, and Molybdenum. We provide precision EDM (Electrical Discharge Machining) services for aerospace, medical, electronics, automotive, and industrial clients worldwide. From rapid prototyping to small-batch production, EadeTech delivers complex geometries, tight tolerances, and high-quality surfaces on hard-to-machine metals.

Learn more about our capabilities at https://www.eadetech.com.


Why Choose EDM Machining?

EDM machining is ideal for complex shapes and extremely hard materials that are difficult to machine using conventional methods. The process uses controlled electrical discharges (sparks) to remove material, enabling:

  • Precision cutting of intricate cavities and contours

  • Machining of very hard or heat-sensitive materials

  • Tight tolerance features in small or deep components

At EadeTech, we specialize in Titanium, Nickel superalloys, and refractory metals, optimizing spark parameters, electrode design, and flushing to achieve the highest quality results.


Capabilities of EadeTech EDM Machining

  • Wire EDM: For intricate 2D and 2.5D profiles

  • Sinker EDM (Ram EDM): For complex 3D cavities and dies

  • Small-feature EDM: Micro holes, thin walls, and delicate structures

  • High-precision machining: Tolerances up to ±0.005 mm

  • Surface finish: Ra 0.2–0.8 µm

  • Materials handled: Titanium, Nickel superalloys, Tantalum, Niobium, Tungsten, Molybdenum


Table 1: Material Properties & EDM Parameters

MaterialHardness (HRC)Wire EDM Speed (mm²/min)Sinker EDM Current (A)ElectrodeSurface Finish (Ra µm)
Ti‑6Al‑4V360.5–1.53–5Graphite0.4–0.6
Inconel 718400.3–1.02–4Copper0.6–0.8
Tungsten90 HRB0.05–0.21–2PCD0.6–0.9
Tantalum95 HRB0.1–0.51–3Copper0.5–0.7

Applications of EDM Machining

  1. Aerospace Components

    • Turbine blades, fuel system components, structural brackets

    • Deep cavities and thin-wall geometries

  2. Medical Devices

    • Implant molds, surgical instruments, complex channels

    • Biocompatible materials with high surface quality

  3. Industrial Equipment

    • Die molds, heat exchangers, precision manifolds

    • Hard metal alloys and refractory metals

  4. Electronics & Automotive

    • High-precision connectors, heat sinks, micro cavities

    • Lightweight Titanium and Nickel alloys


Table 2: EDM Dimensional Capabilities

MaterialMax Workpiece Size (mm)Min Feature Size (mm)ToleranceSurface Finish (Ra µm)
Ti‑6Al‑4V400×300×1500.1±0.0050.4–0.6
Inconel 718350×250×1500.08±0.0050.6–0.8
Tungsten200×150×1000.05±0.010.6–0.9
Tantalum250×200×1200.08±0.0050.5–0.7

EDM Machining Techniques

  1. Wire EDM

    • Cuts complex 2D and 2.5D profiles with high precision

    • Excellent for thin-wall components, micro-features, and slots

  2. Sinker EDM

    • Creates 3D cavities in hard metals that cannot be milled

    • High-quality finishes in dies, molds, and aerospace components

  3. Micro EDM

    • Drills holes down to 0.05 mm in diameter

    • Precision for medical devices, electronics, and aerospace

  4. EDM Drilling

    • Produces deep holes with tight tolerances and consistent diameters

    • Effective on Nickel superalloys, Titanium, and refractory metals


Table 3: EDM Machine Capabilities

Machine TypeMax Workpiece Size (mm)Min Feature Size (mm)Max Depth (mm)Key Features
5-axis Wire EDM400×300×1500.1150Complex 2D/2.5D contours
Sinker EDM350×250×1500.081003D cavities, molds
Micro EDM150×100×500.0520Electronics & medical devices
High-speed EDM300×200×1200.0850Small-batch production

Quality Assurance & Inspection

EadeTech ensures precision, reliability, and repeatability in EDM machining:

  • Coordinate Measuring Machines (CMM) for dimensions

  • Optical comparators for geometry

  • Surface roughness testers for Ra verification

  • Bore gauges for deep micro holes


Table 4: EDM Inspection Standards

Measurement TypeTool/MethodToleranceInspection Frequency
DimensionalCMM±0.005 mm100%
Feature SizeOptical comparator±0.01 mm100%
Surface FinishRa tester0.2–0.8 µm10% batch
Bore DiameterBore gauge±0.005 mm100%

Prototyping and Small Batch EDM Machining

EadeTech supports rapid prototyping and small-batch production:

Table 5: Prototype & Small Batch EDM

MaterialPrototype QtySmall Batch QtyLead TimeToleranceSurface Finish
Ti‑6Al‑4V1–510–501–3 weeks±0.005 mm0.4–0.6 µm
Inconel 7181–520–1002–4 weeks±0.005 mm0.6–0.8 µm
Tungsten1–35–503–5 weeks±0.01 mm0.6–0.9 µm
Tantalum1–510–502–4 weeks±0.005 mm0.5–0.7 µm

EDM Challenges & Solutions

Hard-to-machine materials present the following challenges:

  • Low thermal conductivity causing electrode wear

  • Material work hardening (especially Nickel alloys)

  • Micro holes and thin-wall deformation

EadeTech solutions include:

  1. Optimized spark energy and pulse duration

  2. Graphite, copper, and coated electrodes for maximum tool life

  3. Advanced flushing and dielectric fluid control

  4. Stepwise passes for deep cavities and micro-features


Table 6: Tool Wear & EDM Optimization

MaterialElectrodeTool Life (hrs)Cutting StrategyDielectric
Ti‑6Al‑4VGraphite2–4Low energy pulses, multiple passesDeionized water
Inconel 718Copper1–3Short pulse, low feedDeionized water
TungstenPCD0.5–1Micro EDM, slow feedDielectric oil
TantalumCopper1–2Stepwise cavity machiningDeionized water

Why Choose EadeTech for EDM Machining

  • Material Expertise: Titanium alloys, Nickel superalloys, and refractory metals

  • Precision: Tolerances up to ±0.005 mm and Ra 0.2 µm surface finish

  • Flexibility: From prototypes to small-batch production

  • Advanced Equipment: 5-axis wire EDM, sinker EDM, and micro EDM

  • Global Client Base: Aerospace, medical, electronics, automotive, and industrial sectors

  • Trusted Resource: Visit https://www.eadetech.com for more details

EadeTech delivers complex geometries, precise holes, and superior surface finishes in challenging metals, ensuring parts are ready-to-use for high-performance applications.



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Addr: Room 302, Building D, COFCO Gonghua Project, Zone 20, Honglang Community, Xin'an Street, Bao'an District, Shenzhen City.

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