Electric Discharge Machining(EDM)
Precision (Electric Discharge Machining) EDM Services – Complex Cuts with Micron-Level Accuracy. . "Electrically Engineered for Intricate Tooling & Hard Metals"
EDM
Years of experience
Electric Discharge Machining (EDM): High-Precision Machining for Hard Materials
What Is EDM?
Electric Discharge Machining (EDM) is an advanced manufacturing process that removes material from electrically conductive workpieces using controlled electrical discharges (sparks). Unlike conventional cutting, EDM does not rely on mechanical force, allowing precise machining of extremely hard materials, intricate shapes, fine cavities, and complex geometries. EDM is commonly used in aerospace, automotive, mold making, tool and die, and medical industries where precision, surface quality, and tight tolerances are critical.
Key Features & Advantages
High-Precision Material Removal – Capable of tolerances as tight as ±0.01 mm for intricate components.
Works with Hard & Conductive Materials – Ideal for tool steels, titanium alloys, tungsten carbide, and exotic metals.
Complex Geometries – Produces deep cavities, narrow slots, sharp corners, and fine holes down to 0.1 mm diameter.
Two Main EDM Methods:
Sinker EDM – Uses electrode tools to create cavities, pockets, and detailed features.
Wire EDM – Uses a thin wire (0.02–0.3 mm) to cut precise contours and profiles.
Excellent Surface Finish – Surface roughness Ra 0.4–1.6 μm achievable with minimal post-processing.
Non-Contact Process – Reduces mechanical stress, distortion, and tool wear.
MW+: Your Professional EDM Partner
MW+ delivers high-precision EDM services with ISO-certified quality control, advanced sinker and wire EDM machines, and skilled engineering support. We produce components that meet stringent dimensional and surface requirements for both prototyping and mass production.
Why Choose MW+
Advanced wire and sinker EDM machines for complex geometries
Tight tolerances up to ±0.01 mm and surface finishes Ra 0.4–1.6 μm
Engineering support for electrode design, tool paths, and material selection
Custom EDM Machining Company - Precision Electrical Discharge Services
Leading precision EDM firm, we offer high-end Electric Discharge Machining (EDM) solutions. Our experienced team employs sophisticated Wire EDM and sinker EDM processes to cut intricate shapes with micron accuracy (±0.005mm) in carbides, titanium, and hardened steels. Our bespoke EDM machining process provides stress-free and burr-free parts with high repeatability and makes it the best solution for delicate aerospace, medical, and tooling applications.
Our EDM Machining Capabilities:
- Advanced EDM processes: Deep through-cutting with Wire EDM and complex cavities with sinker EDM.
- Material Expertise: Cutting hardest materials such as hardened tool steels, titanium alloys, and tungsten carbide.
- Precision & Repeatability: Precision machining with narrow tolerances of ±0.005mm and surface finishes to 0.2µm Ra for mass-volume production runs.
- Industry-Specific Solutions: High-precision production of critical components for medical devices, aerospace engines, and precision mold tools.
Trust in our EDM machining of prototypes and production quantities requiring nothing less than un-compromised quality, supported by ISO 9001 certification and on-time ship date guarantees.
20,000+ Precision Parts, 150+ Materials
4.9/5
Tolerance Standard
±0.0005" Precision Guarantee
Since 2015
5/5
Surface Finish
C8-16 μin Ra Mirror Finish
Since 2015
4.8/5
Maximum Workpiece
40" × 28" × 20" Capacity
Since 2015
4.5/5
Material Hardness
Up to 65 HRC Processed
Since 2015
Precision EDM Tolerances: Capabilities for Wire & Sinker EDM
Limits for nominal size
Metals (ISO 2768- f)
Plastics (ISO 2768- m)
0.5mm* to 3mm
±0.05mm
±0.1mm
Over 3mm to 6mm
±0.05mm
±0.1mm
Over 6mm to 30mm
±0.1mm
±0.2mm
Over 30mm to 120mm
±0.15mm
±0.3mm
Over 120mm to 400mm
±0.2mm
±0.5mm
Over 400mm to 1000mm
±0.4mm
±0.8mm
Over 1000mm to 2000mm
±0.5mm
±1.2mm
| Category | Parameter | Standard Grade | Precision Grade | Validation Method |
|---|---|---|---|---|
| Material Properties | Ultimate Tensile Strength | 450 MPa (Al 6061) | 900 MPa (Ti-6Al-4V) | ASTM E8/E21 Testing |
| Thermal Expansion Coeff. | 23.6 μm/m°C (Al) | 8.6 μm/m°C (Invar) | TMA Analysis | |
| Dimensional Control | Positional Tolerance | ±0.005″ | ±0.0008″ | CMM (0.5μm resolution) |
| Surface Profile | 0.010″ | 0.002″ | Laser Scanning | |
| Process Capabilities | Minimum Feature Size | 0.020″ | 0.005″ | Microscope Measurement |
| Aspect Ratio (Depth/Dia.) | 10:1 | 20:1 | Tool Deflection Analysis | |
| Thermal Management | Operating Temp Range | -40°C to +120°C | -196°C to +350°C | Thermal Cycling Tests |
| Thermal Conductivity | 167 W/mK (Cu) | 400 W/mK (CVD Dia.) | Laser Flash Analysis | |
| Surface Engineering | Ra Surface Roughness | 125 μin | 4 μin | White Light Interferometry |
| Coating Thickness | 25-50 μm | 5-10 μm | XRF Measurement | |
| Dynamic Performance | Fatigue Cycles @ 10^6 | 350 MPa | 550 MPa | Resonant Fatigue Testing |
| Vibration Damping | 0.05 ζ | 0.15 ζ | Modal Analysis | |
| Metrology | Measurement Uncertainty | ±0.0002″ | ±0.00005″ | NIST Traceable Standards |
| Flatness/Parallelism | 0.001″/in | 0.0002″/in | Optical Flats | |
| Environmental | Corrosion Resistance | 500h Salt Spray | 2000h Salt Spray | ASTM B117 Testing |
| Outgassing (TML/CVCM) | <1.0%/0.1% | <0.1%/0.01% | NASA ASTM E595 |
Electric Discharge Machining Surface Finishes
We provide finishes for aesthetics and performance: anodizing, polishing, sandblasting, coatings, and heat treatment. Let’s find the right one!
As Machined
This machined finish is rough and displays tool marks, representing the most basic form of surface treatment without any additional finishing or polishing.
Anodizing
It creates a protective oxide layer on aluminum, increasing corrosion resistance and hardness, and allowing for dyeing to enhance appearance.
Polishing
Polishing smooths surfaces to a high sheen, enhancing appearance and reducing roughness while offering some corrosion protection.
Brushed Finish
A brushed finish has fine, parallel lines for a textured look, enhancing grip and reducing fingerprints.
Sandblasting
Sandblasting uses high-pressure air and abrasive particles to clean or texture surfaces, enhancing adhesion for coatings.
Electropolish
Electropolishing is an electrochemical process that smooths and brightens metal surfaces, removing imperfections and enhancing corrosion resistance.
Material Compatibility for Precision EDM Machining
Tool Steel (high wear resistance)
D3 is a high carbon, high chromium tool steel known for its excellent wear resistance and ability to maintain a sharp edge. It is commonly used for cutting tools, dies, and industrial applications requiring high durability.
Subtypes:
- D3 (Standard)
- D3 Cold Work Tool Steel
Pre-Hardened Tool Steel
P21 is a pre-hardened tool steel that offers good machinability and wear resistance. It is ideal for making molds and dies, as it doesn’t require extensive heat treatment.
Subtypes:
- P21 (Standard)
- P21+ (Improved)
Hot Work Tool Steel
H11 is a hot work tool steel known for its toughness and thermal fatigue resistance. It is used in applications involving high temperatures, such as die casting and forging.
Subtypes:
- H11 (Standard)
- H11A (Modified for improved toughness)
Polyoxymethylene (Acetal)
POM is a high-performance engineering thermoplastic known for its low friction, high stiffness, and excellent dimensional stability. It’s widely used in precision parts and mechanical components.
Subtypes:
- POM-C (Copolymer)
- POM-H (Homopolymer)
Polyamide (Nylon)
PA is a versatile synthetic polymer known for its high strength, toughness, and excellent chemical and wear resistance, commonly used in textiles, automotive components, and industrial applications.
Subtypes:
- PA(Nylon) Blue
- PA6 (Nylon)+GF15 Black
- PA6 (Nylon)+GF30 Black
- PA66 (Nylon) Beige (Natural)
- PA66 (Nylon) Black
Polypropylene
PP is a lightweight, durable thermoplastic known for its chemical resistance and versatility. It is widely used in packaging, automotive parts, and consumer goods.
Subtypes:
- PP Homopolymer
- PP Copolymer
High-Density Polyethylene
HDPE is a strong and versatile thermoplastic known for its high strength-to-density ratio. It is commonly used in containers, piping, and plastic bottles.
Subtypes:
- HDPE (Standard)
- HDPE (Recycled)
Low-Density Polyethylene
LDPE is a flexible and durable thermoplastic known for its low density and high chemical resistance. It is often used in packaging films and bags.
Subtypes:
- LDPE (Standard)
- LDPE (Recycled)
Polycarbonate
PC is a strong, impact-resistant thermoplastic known for its clarity and heat resistance. It is commonly used in eyewear lenses, safety equipment, and electronic components.
Subtypes:
- PC (Standard)
- PC (Flame Retardant)
High-Impact Polystyrene
HIPS is a tough and impact-resistant thermoplastic known for its ease of processing and good surface finish. It is commonly used in consumer products and packaging.
Subtypes:
- HIPS (Standard)
- HIPS (Recycled)
Polybutylene Terephthalate
PBT is a thermoplastic engineering polymer known for its excellent mechanical properties and chemical resistance. It is often used in automotive and electrical applications.
Subtypes:
- PBT (Standard)
- PBT (Reinforced)
Polyamide-imide
PAI is a high-performance thermoplastic known for its excellent thermal stability and mechanical properties. It is used in high-temperature applications and aerospace components.
Subtypes:
- PAI (Standard)
- PAI (Filled)
High-Speed Steel
M2 is a high-speed steel known for its high hardness, wear resistance, and ability to retain hardness at elevated temperatures. It is commonly used for cutting tools and drills.
Subtypes:
- M2 (Standard)
- M2 (Coated)
High-Speed Steel
HSS is a high-performance tool steel known for its ability to cut at high speeds without losing hardness. It is widely used in manufacturing cutting tools.
Subtypes:
- HSS (Standard)
- HSS (Coated)
Polyether Ether Ketone
PEEK is a high-performance thermoplastic known for its excellent chemical resistance and thermal stability. It is used in specialized applications such as aerospace and medical devices.
Subtypes:
- PEEK (Standard)
- PEEK (Reinforced)
Polymethyl Methacrylate
PMMA is a transparent thermoplastic known for its clarity and UV resistance. It is commonly used as a lightweight alternative to glass in various applications.
Subtypes:
- PMMA (Standard)
- PMMA (Impact Resistant)
Polytetrafluoroethylene (Teflon)
PTFE is a high-performance fluoropolymer known for its non-stick properties and chemical resistance. It is widely used in coatings, seals, and gaskets.
Subtypes:
- PTFE (Standard)
- PTFE (Filled)
