EDM & Wire EDM
TDX Manufacture or machine the metal parts you want with advanced wire EDM machines. You transfer the CAD data of the product and we complete the production.
● High Precision: Standard dimensional tolerance of ±0.0001
● Various materials: aluminum, steel, etc.
● Get your products and parts ready in as fast as 24 hours
● Certifications: ISO9001:2008, TS16949
ISO
ISO9001.2015 Certified
CNC machines
Plastic & metal materials
CNC parts made monthly
Our clientswe work with
CNC Grinding Surface Finishes
EDM Surface Finishes
Surface finishing for EDM components enhances corrosion resistance, wear performance, and visual appeal. While standard electrical discharge machining leaves a fine, textured as-machined finish, secondary treatments—such as sanding, mirror polishing, bead blasting, and precision plating—can be applied to meet specific functional and aesthetic demands.
Standard EDM
Cavity forming via pulse discharge; capable of machining deep cavities, narrow slots, sharp corners, and hard-to-cut materials such as cemented carbide; suitable for mold cavities and profiled hole machining.
Request-a-quote
Mirror EDM
Uses finishing power supply; cavity surface roughness up to Ra<=0.2um, achieving mirror finish and reducing polishing steps; suitable for high-gloss mold requirements.
Request-a-quoteEDM Capabilities
We specialize in high-precision electrical discharge machining to produce complex internal geometries and hard-metal components that conventional milling cannot achieve.
EDM
Sinks precision-shaped electrodes into hardened metals to cut sharp internal 90-degree corners, thin walls, deep grooves, and intricate blind cavities without mechanical tool pressure.
Wire EDM
Uses a continuously moving, electrically charged brass wire to execute micro-kerf cuts, steep vertical walls, precision punches, and narrow parallel slots with strict edge squareness.
Materials for EDM
We machine a wide range of metals and engineering plastics to meet the performance requirements of diverse applications. Common CNC turning materials include Aluminum 6061-T6, Stainless Steel 304, Brass C360, and POM (Delrin), offering an excellent balance of machinability, strength, and cost efficiency.
Standard EDM
Mirror EDM
Copper
Steel
Stainless Steel
Steel (Mild Steel & Hardened Steel)
Brass (C360, C260)
Nylon
Stainless Steel (303, 304, 316, 17-4)
Copper (C110, C101)
Titanium
EDM Surface Finishes
Electrical discharge machining leaves a distinctive, fine-textured finish directly from the spark erosion process. Depending on the functional and aesthetic requirements of your molds and precision components, secondary surface treatments can be applied to optimize performance, reduce friction, or improve appearance.
As machined
The direct result of the EDM process, leaving a functional, fine-textured finish ideal for internal mold cavities where external aesthetics are non-critical.
Sanding & Polishing
Mechanical smoothing that eliminates micro-irregularities and discharge marks, resulting in high-gloss or semi-gloss finishes for critical mold cavity faces.
Sand, Bead Blasted
Propels fine abrasive media against the surface to create a uniform, matte texture that effectively masks operational marks and standardizes appearance.
Painted
A protective and aesthetic liquid coating applied to achieve custom colors, smooth visual textures, and basic environmental protection.
Powder coat
A durable, wear-resistant polymer finish applied electrostatically and thermally cured, providing a thick, uniform protective layer.
Anodized
An electrochemical conversion process primarily for aluminum components that significantly enhances surface hardness, wear durability, and corrosion resistance.
E-Coating
An electrostatically deposited protective paint layer offering uniform coverage and high corrosion resistance, commonly used for industrial parts.
Nickel Plating
An electroplated metallic coating providing robust corrosion defense, enhanced surface uniformity, and improved wear performance.
EDM Tolerances
For professional electrical discharge machining and wire EDM projects, we apply reliable engineering standards based on part geometry, material hardness, and feature depth. These tolerances align with our high-precision manufacturing capabilities to ensure dependable dimensional accuracy. The table below outlines our standard EDM and wire EDM tolerance guidelines, including feature accuracy and surface finish capabilities.
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.005 mm (±0.0002″) | ±0.002 mm (±0.00008″) |
| Hole/Opening Diameter | ±0.006 mm (±0.00024″) | ±0.0025 mm (±0.0001″) |
| Slot Width | ±0.008 mm (±0.0003″) | ±0.003 mm (±0.00012″) |
| Min. Corner Radius | R0.05-0.1 mm typical | Down to R0.02 mm |
| Surface Finish (Ra) | 0.6-1.6 µm | As low as 0.2 µm (multi-pass) |
| Standards Applied | ISO 2768-f, GB/T 1804-2000 | ISO 1302 for surface finish |
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How can I get a quote, and what files do you need?
You can upload your 2D drawings and 3D CAD files (STEP, IGES, or DXF formats) via our [Quote Request Form]. The more details you provide (material, quantity, finish, tolerance), the faster and more accurate your quote will be. Our engineers usually respond within 24 hours.
How accurate are your EDM and Wire EDM machines? Can you guarantee tolerances?
Our Wire EDM machines routinely achieve tolerances of ±0.005 mm, and down to ±0.002 mm for critical features. Sinker EDM typically maintains ±0.01 mm. We use high-precision CMM and toolmakers’ microscopes for inspection, and a full dimensional report can be provided on request.
What is your standard lead time for EDM and Wire EDM projects?
Typical lead time ranges from 3 to 10 working days, depending on part complexity, quantity, and surface finishing requirements. We offer expedited services for urgent prototyping or low-volume production needs — just let us know your deadline upfront.
What types of materials can you work with in EDM and Wire EDM?
We work with a wide range of conductive materials, including tool steel, stainless steel, Inconel, titanium, tungsten, and carbide. Wire EDM requires the material to be electrically conductive, while sinker EDM may be used for certain advanced composites and ceramic-coated surfaces. If you have a special alloy in mind, we’re happy to run feasibility checks.
What’s the difference between EDM and Wire EDM, and how do I choose the right process for my part?
EDM (also called Sinker EDM) is ideal for creating deep cavities, complex shapes, and fine internal features, especially in hard metals. Wire EDM is best for precise, narrow kerf cuts, internal contours, and parts requiring tight tolerances. If you’re unsure, our engineers will help you select the best process based on your CAD files and functional requirements.
Contact Information
Email: liu.ji@cq-taidexing.com
Address: No. 2 Xishan Road, Biquan Subdistrict, Bishan District, Chongqing City
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