Precision EDM machining for conductive metals, hardened materials, sharp internal features, deep cavities, and complex geometries beyond conventional cutting methods.
ISO 9001:2015 | ISO 13485:2016 | IATF 16949:2016
| Comparison Factor | Wire EDM | Sinker EDM | Micro EDM / Hole Drilling EDM |
| Best For | Through profiles, fine contours, sharp edges | Blind cavities, deep features, mold details | Micro holes and miniature features |
| Machining Method | Moving wire electrode cuts along programmed path | Shaped electrode creates cavity geometry | Small electrodes create precision holes/features |
| Key Advantage | High profile accuracy without cutting force | Complex internal geometry and sharp corners | Extremely small features and deep holes |
| Typical Applications | Dies, punches, precision plates | Mold cavities, inserts, tooling | Cooling holes, medical parts, micro components |
Tool steels and hardened steels are commonly processed with EDM because their high hardness and wear resistance can make conventional machining challenging.
EDM allows manufacturers to produce complex cavities, sharp corners, and precision features after heat treatment, making it widely used for mold components and tooling applications.
High hardness and wear resistance
Suitable for post-heat-treatment machining
Stable dimensional performance
Ideal for complex cavities and detailed features
H13 Tool Steel
D2 Tool Steel
SKD11
Hardened Alloy Steel
Injection mold inserts
Dies and tooling components
Precision cavities
Wear-resistant parts
Titanium alloys are selected for applications requiring high strength, lightweight performance, and excellent corrosion resistance. EDM provides an effective solution for machining complex titanium components where traditional cutting methods may face challenges.
Excellent strength-to-weight ratio
High corrosion resistance
Suitable for demanding environments
Maintains material properties during machining
Ti-6Al-4V
Commercially Pure Titanium
Aerospace components
Medical components
High-performance precision parts
Inconel and other nickel-based alloys are known for high-temperature strength and corrosion resistance. EDM is often selected for complex features that require precision machining of these difficult-to-cut materials.
Excellent high-temperature performance
High strength retention
Corrosion and oxidation resistance
Suitable for complex geometries
Inconel 718
Inconel 625
Aerospace components
Turbine-related parts
High-performance industrial components
Stainless steel provides a balance of strength, corrosion resistance, and machinability for precision EDM components.
Good corrosion resistance
Stable mechanical properties
Suitable for detailed features
Compatible with precision applications
304 Stainless Steel
316 Stainless Steel
17-4PH Stainless Steel
Medical components
Precision tooling
Industrial parts
Functional prototypes
Copper and brass are commonly used in EDM applications because of their electrical conductivity and machining characteristics.
These materials are also widely used as electrode materials in EDM processes.
Excellent electrical conductivity
Good dimensional stability
Suitable for precision components
Copper
Brass
Bronze
Electrical components
Precision parts
EDM tooling and electrodes
Aluminum alloys can be processed with EDM when complex geometries, fine details, or specific feature requirements make EDM a suitable option.
Lightweight
Good machinability
Good corrosion resistance
Suitable for complex precision features
6061 Aluminum
7075 Aluminum
Aerospace prototypes
Precision components
Lightweight structures
| Finishing Option | Surface Characteristics / Performance | Suitable Materials | Typical Applications |
| EDM Finish | Maintains the surface characteristics generated during EDM processing with controlled finish requirements. | Hardened steel, tool steel, conductive alloys | Mold cavities, precision inserts, complex features |
| Wire EDM Fine Finish | Provides smoother edges and improved profile quality through additional cutting passes | Conductive metals | Precision profiles, thin components, intricate parts |
| Polishing | Improves cavity surfaces and appearance | Tool steel, stainless steel, aluminum alloys | Mold surfaces, visible precision components |
| Grinding | Improves dimensional accuracy on critical features | Hardened steel, tool steel | Precision components, tooling parts |
| Coating / Surface Treatment | Enhances wear resistance, corrosion resistance, or service performance when required | Tool steel, alloy steel, metal components | Molds, industrial parts, high-wear applications |
| EDM Process | Typical Accuracy | Engineering Consideration | Applications |
| Wire EDM | ±0.005–0.02 mm typical | Material thickness, wire condition, flushing, cutting parameters | Precision profiles, inserts, dies |
| Sinker EDM | Project-dependent precision | Electrode wear, cavity depth, flushing, discharge settings | Mold cavities, tooling components |
| Micro EDM | Micro-feature capability | Electrode size, pulse parameters, material behavior | Micro holes, medical and electronic parts |
EDM (Electrical Discharge Machining) uses controlled electrical sparks to remove material from electrically conductive parts. Without direct cutting force, it is suitable for hardened materials, sharp features, and complex geometries.
Wire EDM uses a moving wire electrode to cut through profiles and contours. Sinker EDM uses a shaped electrode to create blind cavities, deep features, and complex internal geometries.
EDM can process electrically conductive materials including hardened steel, stainless steel, titanium, carbide, copper alloys, and superalloys. Non-conductive plastics and most ceramics are not suitable.
EDM produces minimal mechanical stress and reduces burr formation, but surface condition depends on discharge parameters, material, and finishing requirements. Recast layer or additional finishing may be required for critical applications.
CNC machining uses cutting tools for material removal, while EDM uses electrical discharge for conductive materials, hardened parts, sharp corners, cavities, and fine features. Many complex parts combine both processes.
EDM cost depends on material, complexity, tolerances, and processing time. It is usually slower than CNC but can be more economical for features that conventional cutting cannot efficiently produce.
Yes. Many complex parts require both CNC machining and EDM to achieve the required geometry and accuracy. CNC machining is typically used for general features and material removal, while EDM is applied to intricate details, tight features, and challenging areas.
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