Electrical Discharge Machining
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Precision EDM Wire Cutting Services | CNC Sinker EDM Machining
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Parts in as little as 5 days
CNC SERVICE
Wire EDM Services
Wire EDM is performed by submerging a metal part in dielectric fluid where an electrically charged wire is then fed through the submerged metal component. The current passing through the wire creates sparks which cut through the material and form the desired shape of the component. Wire EDM is an ideal manufacturing process when you have clearance for the wire above and below the part feature.
Sample available
Precision and Quality
Versatile Material Options
Scalable Production
Sinker EDM Services
To achieve ultra-precise internal features, Sinker EDM begins by crafting a custom electrode. This electrode is then charged and immersed in dielectric fluid. By discharging an electric current, sparks are generated that erode the metal workpiece with microscopic accuracy. This process allows us to create intricate shapes and deep cavities with exceptional surface quality, perfect for hard-to-machine materials.
Ideal for custom prototypes, molds, tooling, and small-batch production
Bevel gears
Internal gears
Worm gears
Blind keyholes
Features of Wire EDM & EDM Machined Parts
- Wire EDM uses a thin, charged wire to cut through conductive materials, ideal for through cuts and complex external profiles.Sinker EDM uses a custom-shaped electrode to erode cavities, blind holes, and internal features that cannot be reached with wire cutting.
- Our Wire EDM can hold tolerances as tight as ±0.005 mm depending on part size, material, and geometry.
- Yes. EDM is widely used for small, deep, blind holes and complex internal cavities that are difficult or impossible to produce with standard machining.
EDM provides an excellent surface finish, often eliminating the need for secondary processes like grinding or polishing.
- Yes, Wire EDM can be used for small to medium volume production, especially for complex, high-precision parts that cannot be made efficiently by stamping, molding, or conventional machining.
CNC Materials Available at FORMEX
Available materials:
- Cold work mold steel 1.2379、1.2842、1.2080、1.2363
- Hot work mold steel 1.2344、1.2343、1.2581
- Alloy structural steel 5140/1.7035、4140/1.7225、4142、4340、5120/1.7147、4130/1.7218、4135、52100
- Plastic mold steel 1.2311/p20、1.2321、1.2738、1.2083
Carbon steel features low cost, good workability (weldable/stampable/heat-treatable), and controllable properties—its performance can be adjusted from soft-tough to hard-strong by modifying carbon content.
Available materials:
- （ASTM）1008、1010、1015、1020、1025、1040、1045、1050、G11170、G11440、4130、51100、52100、4140
- （JIS）：SKD1、SKD11、SKT4
Aluminium alloys have a high strength-to weight ratio, provide natural corrosion resistance, high electrical and thermal conductivity .
Available materials:
- Aluminium 5A01、5A02、5A03、5A05、5A06、5B06、5A12、5A30、5A33、5A41、5A42、5A66、5005、5019、5050、5251、5052、5154、5154A、5454、5154A、5754 、5056 、5356、5456 、5082、5182、5086
- Aluminium 6A02、6B02、6A51、6101、6101A、6005、6005A、6351、6060、6061、6063、6063A、6070、6181、6082
- Aluminium 7A01、7A03、7A04、7A05、7A09、7A10、7A15、7A19、7A31、7A33、7A52 、7003、7005、7020、7022、7050、7075
- Aluminium 4A03、4A11、4A13、4A17、4004、4032、4043
- Aluminium 3A21、3003、3103、3004、3005、3105
- Aluminium 2A01、2A02、2A04、2A06、2A10、2A11、2B11、2A12、2A13、2A14、2A16、2B16、2A17、2A20、2A21、2A25 、2A49、2A50、2A70、2A80、2A90、2004、2011、2014、2014A 、2214 、2017、2017A、2177、2218、2618、2219、2024、2124
- Aluminium 1A99、1A97、1A95、1A93、1A90、1A85、1A80、1A80A、1070、1070A、1370A、1060、1050、1050A、1A50、1350、1145、1350、1A30、1160、1200、1235
Stainless steel is characterized by high strength and excellent corrosion resistance.
Available materials:
- Stainless Steel 303
- Stainless Steel 304
- Stainless Steel 304L
- Stainless Steel 316
- Stainless Steel 316L
- Stainless Steel 405
- Stainless Steel 416
Copper is known for its high electrical and thermal conductivity, is flexible and durable.
Available copper varieties:
- Red copper(Pure Copper & Copper Alloys with Minimal Impurities) C10100、C10200、TP2、TP1
- Brass (Copper-Zinc Alloys) H68、C24000、C22000
- Bronze (Originally Cu-Sn Alloys; Now Refers to Cu Alloys Except Brass & Cupronickel) C60600、C61000、C50500、C51000、C52100
- Cupronickel (Copper-Nickel Alloys, Nickel as Main Alloying Element) C70600
Magnesium is a structural metal characterized by extreme lightness, high strength, and excellent natural corrosion resistance.
Available Alloys:
- Magnesium AZ31
- MAM61、MZK61
High strength-to-weight ratio, corrosion resistance, biocompatibility
Available Alloys:
- Ti-6Al-4V (Grade 5), Ti Grade 2, Ti Grade 5 ELI
1. Excellent comprehensive mechanical properties: balanced rigidity and toughness, good impact resistance (especially low-temperature impact, -40℃ still maintain toughness);
2. Easy processing: good melt fluidity, suitable for complex-shaped injection molding (e.g., thin-walled parts, intricate structures);
3. Good surface finish: easy to coat, print, or plate (e.g., electroplating to achieve metallic luster);
4. Cost-effective, but poor high-temperature resistance (long-term service temperature only 60~80℃) and poor weather resistance (easy to yellow or brittle under UV irradiation).
- Outstanding light transmittance (over 90%, close to glass)
- Wide temperature resistance range (-40℃~120℃), but weak chemical resistance
- Extremely high impact resistance
1. Good temperature resistance (long-term service temperature: 120~140℃), aging resistance;
2. Excellent electrical insulation, suitable for high-frequency scenarios;
3. Easy processing (good melt fluidity), but slightly weak impact resistance (often reinforced with glass fiber).
PET is a widely used thermoplastic polyester, available in two forms: amorphous PET (transparent, for packaging) and semi-crystalline PET (high-strength, for fibers/engineering parts). It is recyclable (marked as "Recycling Code 1").
1. Extremely strong comprehensive performance: high temperature resistance (long-term 240℃), impact resistance, chemical corrosion resistance
2. Good biocompatibility
3. Excellent dimensional stability, suitable for precision parts.
1. Excellent mechanical properties: high strength, high toughness, good impact and fatigue resistance;
2. Wear-resistant and self-lubricating: low friction coefficient, no additional lubrication required;
3. Good oil resistance, but high hygroscopicity.
1. High rigidity and hardness, mechanical properties close to metals;
2. Wear and fatigue resistance: no easy deformation during long-term use, stable friction coefficient;
3. Resistance to organic solvents, good dimensional stability (lower hygroscopicity than PA).
Polypropylene (PP) - PP is lightweight and has high chemical resistance, food safe, articulates well, impact resistant, touch and is environmentally friendly. Mainly used for; Packaging, stationary and automotive.
PVC is one of the most widely produced plastics globally, available in two main forms: rigid PVC (uPVC) and flexible PVC (modified with plasticizers). It is cost-effective and versatile.
Commonly called "acrylic" or "plexiglass," PMMA is a transparent thermoplastic valued for its optical clarity and weather resistance—often used as a substitute for glass.
Known by the trade name "Teflon," PTFE is a fluoropolymer famous for its extreme chemical inertness and low friction coefficient—often called the "non-stick plastic."
PPSU is a high-performance polysulfone engineering plastic, renowned for its exceptional heat resistance, toughness, and biocompatibility—ideal for demanding environments.
PS is a common thermoplastic with two main variants: general-purpose polystyrene (GPPS) (hard, brittle) and high-impact polystyrene (HIPS) (toughened with rubber). It is cost-effective and easy to process.
Filter By:
As machined/Deburr/RAW
As machined finish is a raw finish that displays machining marks from the machining process. As standard we machine to 3.2Ra, however you can specify the surface roughness down to 0.2Ra.
As machined/Deburr/RAW
Visible tooling marks and surface scratches.
As machined/Deburr/clear matte anodized
Visible tooling marks and surface scratches.
Anodizing
Anodizing is an electrochemical surface treatment process primarily used for aluminum (and occasionally other non-ferrous metals like titanium, magnesium, or zinc). Its core purpose is to enhance the metal’s natural oxide layer(typically 5–50 μm), creating a thicker, denser, and more durable coating that improves corrosion resistance, wear resistance, and aesthetic versatility (e.g., coloring). Unlike plating (which adds a foreign metal layer), anodizing strengthens the metal’s own oxide—so the coating is integral to the base material and won’t peel or chip easily.
anodizing sandblasting/masking
Removes all machining marks
Green anodized+sand-blasted
Removes all machining marks
Polished-Gradient anodized-Ink masking-De-anodized-Ink removal
Removes all machining marks
anodized +sandblasted-bright
Removes all machining marks
Painting
Painting is a process that forms a continuous, uniform film on the surface of substrates (such as metals, plastics, wood, concrete, etc.) using liquid or paste-like paints. Its core purposes are to achieve three key functions: decorative enhancement, protective shielding, and functional reinforcement.
painted white matte
Removes all machining marks
White painted/Bright
Removes all machining marks
Gradient painting
Removes all machining marks
Paint speckle finishing
Removes all machining marks
powder coating
Powder coating is a dry finishing process used to apply a durable, decorative, and protective layer to a wide range of materials—most commonly metals (e.g., steel, aluminum), but also some plastics, wood, or glass. Unlike liquid paints (which contain solvents that evaporate during curing), powder coating uses finely ground particles of resin and pigment that are electrostatically charged, sprayed onto a surface, and then “baked” to melt and fuse into a smooth, uniform film. This process produces a coating that is far more resistant to chipping, scratching, fading, and corrosion than traditional liquid finishes.
powder coating-black matte
Removes all machining marks
Powder coating-Matte-Texture
Removes all machining marks
As machined/Deburr/clear matte anodized
Visible tooling marks and surface scratches.
As machined/Deburr/clear matte anodized
Visible tooling marks and surface scratches.
LOGO/ laser engraving
Laser engraving a logo utilizes precise laser technology to create sharp, detailed designs on various materials, ensuring high-quality, durable, and customizable branding solutions.
Anodized+laser engraved
Removes all machining marks
Painted+laser engraved+Color Paint Filling
Removes all machining marks
Painting+laser engraved/plastic
Removes all machining marks
Nanoimprint Lithography（NIL）
Nanoimprint Lithography (NIL) is a high-resolution, cost-effective nanofabrication technique used to create nanoscale patterns on various substrates. It works by mechanically imprinting a pre-fabricated nanostructured mold (or template) onto a material, transferring the pattern with high fidelity.
aluminum
Removes all machining marks
Laser color marking
Laser color marking is a precision material processing technique that uses a focused laser beam to create colored marks on the surface of various materials through controlled thermal interaction.
Laser color marking-stainless steel
Visible tooling marks
Zinc-plating
Zinc-plating is a surface treatment process in which a thin layer of zinc is applied to the surface of a metal substrate (most commonly steel or iron) to protect it from corrosion.
Zinc-plating
Visible tooling marks and surface scratches.
Knurling
Knurling is a manufacturing process used to create a patterned, textured surface on metal (or occasionally other materials) to improve grip or enhance aesthetics.
Knurling-steel
Visible tooling marks and surface scratches.
Press Knurling
Visible tooling marks and surface scratches.
Knurling
No visible tooling marks and surface scratches.
Mirror polishing
Mirror polishing is a precision surface finishing process designed to create an ultra-smooth, highly reflective surface on a material—resembling the clarity and shine of a mirror. It eliminates surface imperfections (such as scratches, oxidation, unevenness, or micro-roughness) and refines the material’s texture to a level where light is uniformly reflected, rather than scattered.
Mirror polished
Removes all machining marks
Hot-Dip Galvanizing
Hot-Dip Galvanizing (often abbreviated as HDG) is a thermal surface coating process that applies a thick, durable layer of zinc to iron or steel substrates to protect them from corrosion. Unlike electroplating (a cold, electrolytic process), hot-dip galvanizing involves immersing the metal in molten zinc, creating a metallurgically bonded coating that offers long-lasting protection.
Hot-Dip Galvanizing-steel
Visible tooling marks and surface scratches.
Nickel plating
Nickel plating (also called nickel electroplating) is an electrolytic surface finishing process that deposits a thin, uniform layer of nickel onto the surface of a metal substrate (most commonly steel, copper, brass, or aluminum)，creating a coating that enhances corrosion resistance, wear resistance, or aesthetic appeal.
Nickel plated
Visible tooling marks and surface scratches.
Sand blasting
We offer 30 – 220 grit bead blasting, aqua blasting and all colours of anodising including colour matching.
120# sand-blasted
Removes all machining marks
sand-blasted 200#-Anodized aluminum
Removes all machining marks
chrome plating
Chrome plating (also known as chromium plating) is an electrolytic surface finishing process that deposits a thin layer of chromium onto a metal substrate to enhance durability, corrosion resistance, and aesthetic appeal. It is widely used in both functional and decorative applications due to chromium’s unique properties—hardness, luster, and resistance to tarnishing.
chrome plated-pc
Removes all machining marks
(Color)Paint Filling
Ink filling refers to the process of adding ink (liquid or paste-like coloring/media) into a container, device, or substrate to enable functions like marking, printing, writing, or industrial coating. Its definition and application vary widely across different fields—from everyday stationery to large-scale manufacturing—depending on the type of ink, target device, and end use.
logo laser engraved+Paint Filling（red）
Color filling is a post-processing technique used to enhance laser-engraved designs by adding paint or pigment to the engraved areas, improving visual appeal and brand recognition
Nitriding
Nitriding is a surface hardening heat treatment process that enriches the surface of ferrous metals (primarily steel, cast iron, and some stainless steels) with nitrogen. The goal is to create a ultra-hard, wear-resistant outer layer (called a “nitride layer”) while maintaining the metal’s tough, ductile core—making it ideal for parts that need to withstand friction, impact, or corrosion without breaking.
Nitrided-1045
Removes all machining marks
Phosphating
Phosphating is a chemical surface treatment process primarily used on ferrous metals (e.g., steel, iron) and some non-ferrous metals (e.g., aluminum, zinc). Its core purpose is to form a thin, adherent, and porous phosphate conversion coating on the substrate’s surface through a controlled chemical reaction between the metal and a phosphoric acid-based solution. This coating acts as a “bridge”—enhancing subsequent processes like painting, powder coating, or lubrication, while also providing mild corrosion resistance on its own.
Phosphating
Removes all machining marks
Passivation
The color is most “close to the base material’s original color” and hard to distinguish solely by color.Passivation is a surface treatment process designed to enhance the corrosion resistance of metals—most commonly stainless steel, but also applicable to aluminum, titanium, and other alloys. Its core principle is to create a thin, stable, and inert “passive film” on the metal surface, which acts as a barrier against environmental factors (e.g., moisture, oxygen, chemicals) that cause rust or corrosion.
PASSIVATION-SS304
Visible tooling marks and surface scratches.
PVD plating
PVD Plating (short for Physical Vapor Deposition Plating) is a widely used dry surface coating technology in industrial fields. Its core principle is: in a vacuum environment, physical means (such as heating, sputtering, arc discharge, etc.) are used to convert the “coating material” (metal, alloy, or compound) into gaseous atoms, molecules, or ions. These gaseous particles then deposit and condense on the surface of substrates (such as metals, ceramics, plastics, etc.), ultimately forming a uniform, dense, and strongly adherent functional or decorative thin film.
pvd black
Blackening
Blackening is a surface modification process that forms a uniform, adherent black film on the surface of substrates—most commonly metals (e.g., iron, steel, copper, aluminum)—through chemical reactions, physical deposition, or thermal treatment. Its primary goals are to enhance corrosion resistance, improve aesthetic appearance (creating a matte or glossy black finish), and in some cases, boost functional performance (e.g., reducing light reflection, increasing surface hardness).
blackening+brushed
Removes all machining marks
Brushing
Brushed surface treatment is a physical processing technique that creates uniform, parallel, or regular textures on material surfaces through mechanical friction. It is widely applied to the surfaces of metals (stainless steel, aluminum alloys, copper, etc.) and some plastics, combining both decorative and functional benefits.
Brushed+aluminum
Removes all machining marks
Silk screen printing
Silk screen printing, also known simply as screen printing, is a versatile, widely used printing technique that transfers ink onto a substrate (e.g., fabric, paper, plastic, metal) through a porous mesh screen. A stencil blocks ink from passing through unwanted areas, while the open mesh allows ink to deposit onto the surface below—creating sharp, durable designs even on irregular or textured materials.
Silk screen Plastic
Removes all machining marks
CD pattern
A classic texture form that combines functionality and decorativeness.By processing regular concentric circular or spiral micro-grooves on the material surface, it utilizes the principles of light refraction and interference to present a “dynamic light and shadow effect” similar to that of an optical disc—showing gradient colors or light-dark changes when viewed from different angles, with both a sense of technology and visual layering.
Steel
Removes all machining marks
Aluminum+Knurling
Removes all machining marks
Vacuum Plating
Vacuum plating, also known as vacuum deposition, is a advanced surface coating technology that deposits a thin, uniform layer of material (such as metals, oxides, or nitrides) onto the surface of a base substrate (e.g., plastic, glass, metal, ceramic) in a high-vacuum environment. Unlike traditional electroplating (which relies on chemical reactions in liquid solutions), vacuum plating uses physical processes (evaporation, sputtering, or ion plating) to form coatings.
Vacuum Plated+UV Coating
Removes all machining marks
Chemical etching
to create precise patterns, textures, or designs on materials. While they achieve similar results (removing material to form features), their mechanisms, strengths, and applications differ significantly. Combining them leverages the advantages of both—chemical etching for large-area uniformity and laser etching for high-precision details.
chemical etching+laser etching
Removes all machining marks
Gold/Silver plating
Gold plating and silver plating are two common electroplating or surface coating technologies that deposit a thin layer of gold (Au) or silver (Ag) on the surface of a base material (such as metal, plastic, or ceramic). The core purpose is to combine the base material’s mechanical properties (e.g., strength, cost-effectiveness) with gold/silver’s unique characteristics (e.g., corrosion resistance, conductivity, decorative luster), widely used in electronics, jewelry, industrial parts, and cultural crafts.
99% Gold plated -T2
Removes all machining marks+ mirror polished
silver-plated
Removes all machining marks+ mirror polished
