Sinker EDM Services by Koonze Model
Koonze Model offers precision Sinker EDM services ideal for creating complex 3D cavities, molds, and intricate parts with tight tolerances. Our advanced equipment and skilled technicians ensure consistent quality and smooth finishes on hard-to-machine metals and alloys. Whether for prototype or production runs, we deliver reliable results for your most demanding projects.
- Complex 3D cavity machining for molds and dies
- High precision with tight tolerance control
- Capable of working with hard metals and intricate geometries
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Precision Sinker EDM Services at Koonze Model
Koonze Model delivers high-quality sinker EDM services, using electrical discharges to precisely shape conductive materials. Our expert team follows a detailed process to design and machine complex parts with tight tolerances.
Sinker EDM excels at producing intricate cavities and hidden features that traditional methods can’t achieve, regardless of material hardness.
Ideal for hardened steels and versatile metals like aluminum, stainless steel, and brass, our service supports small-batch and custom machining needs.
Sinker EDM Applications
Sinker EDM enables fast and precise fabrication of tooling components like inserts, cores, and cavities. Its ability to machine complex geometries quickly helps accelerate production and reduce lead times.
Sinker EDM delivers highly accurate molds with fine surface finishes and intricate features, minimizing the need for post-processing and ensuring dimensional precision.
Ideal for metal stamping dies, sinker EDM allows the creation of complex shapes with high accuracy. It ensures consistent quality for parts that demand tight tolerances and intricate detail.
Sinker EDM excels at producing fine features in jewelry, electronics, and medical devices—such as engravings, micro-components, and surgical tools—with high repeatability and precision.
This process can achieve precise, sharp internal corners that are critical for detailed mold and die work, especially in plastic injection and metal stamping applications.
Sinker EDM machines deep, narrow ribs in aerospace and automotive parts, improving structural strength while reducing weight for enhanced performance and efficiency.
Sinker EDM can create complex internal cavities not visible from the exterior—ideal for aerospace and automotive components requiring weight reduction without sacrificing strength.
It allows precise cutting of blind keyways in confined areas, ensuring secure fits in mechanical assemblies where traditional methods fall short.
Sinker EDM produces accurate internal splines and threads used in gear hubs, drive shafts, and coupling components—critical for power transmission in industrial and automotive systems.
Why Choose Koonze Model for Sinker EDM Services
Industry-Leading Precision
We deliver dimensional tolerances as tight as ±0.004 mm with consistent accuracy, even in complex geometries and hardened materials.
Full In-House Capabilities
From electrode design to finishing, all sinker EDM processes are performed in-house, ensuring faster lead times and full process control.
Certified Quality Standards
We are ISO 9001, IATF 16949, and ISO 13485 certified—supporting critical industries like automotive, aerospace, and medical with dependable quality.
Flexible Production Volumes
Whether you need a single prototype or thousands of production units, our sinker EDM services are tailored for both low- and high-volume projects.
Request a Sinker EDM Quote Today
Get fast, accurate pricing for your complex EDM project. Upload your design files and let our experts take it from there.
Sinker EDM Materials
Sinker EDM is compatible with a wide range of materials, provided they are electrically conductive. Below are some commonly used materials along with their typical applications:
Aluminum
Lightweight and conductive, aluminum is ideal for prototyping and parts requiring good thermal and electrical performance with moderate strength.
Brass
Known for its excellent machinability and corrosion resistance, brass is commonly used for decorative components, connectors, and low-friction applications.
Copper
With outstanding electrical and thermal conductivity, copper is frequently used for EDM electrodes and components in electrical and heat transfer systems.
Exotic Metals
Includes materials like Inconel and Hastelloy, which offer high strength, corrosion resistance, and temperature stability for aerospace and energy applications.
Galvanized or Bright Zinc-Plated Steel
These coated steels are used where corrosion resistance is needed, though care must be taken during EDM to manage surface coatings and vaporization.
Molybdenum
A high-melting-point metal with excellent strength and stability, molybdenum is suitable for aerospace, electronics, and high-temperature components.
Titanium
Lightweight, strong, and corrosion-resistant, titanium is ideal for aerospace, medical, and high-performance industrial parts.
Tungsten
Exceptionally dense and heat-resistant, tungsten is used in applications requiring durability under extreme conditions, including electrical contacts and tooling.
Carbide
Extremely hard and wear-resistant, carbide is used for cutting tools, dies, and wear components where dimensional stability is critical.
Tool Steels
Designed for hardness and durability, tool steels are widely used in mold-making, dies, and precision industrial parts requiring high wear resistance.
Sinker EDM Capabilities
| Capability | Description | |
|---|---|---|
| Dimensional Tolerance | The permissible dimensional tolerance is ±0.004 mm. | |
| Cutting Axis | Sinker EDM machines a workpiece through vertical movement along the z-axis. | |
| Length | The maximum workpiece length is 47″, generally limited by the machine’s Z-axis stroke. This vertical movement controls the electrode—typically graphite or copper—that generates electrical discharges to erode the material. | |
| Height | Sinker EDM can accommodate workpieces up to 14" in height, though the exact size may vary based on workspace limitations and maximum allowable dimensions. | |
| Accuracy | Accuracy within ±0.004 mm can be achieved by carefully selecting the electrode material and closely controlling the discharge current and frequency. | |
| Repeatability | Sinker EDM’s repeatability and reliability rely on key technical factors such as precise spark discharge control, stable electrical parameters, accurate alignment of the tool and workpiece, effective dielectric flushing, and a controlled environment to minimize external influences on the process. | |
| Width | The workpiece can have a maximum width of 27″. | |
| Surface Finish | Sinker EDM delivers exceptionally smooth and consistent finishes, though further processing may be required depending on the part’s specific needs. | |
Sinker EDM Advantages
Why choose sinker EDM? Here’s what it brings to the table:
Sinker EDM Disadvantages
Here are some limitations to consider with the sinker EDM process:
Alternatives to Sinker EDM Machining
Koonze Model provides several alternatives to sinker EDM machining, including:
Ideal for achieving tight tolerances and fine surface finishes, precision grinding uses abrasive tools to shape materials. It’s a strong alternative to sinker EDM when working with non-conductive materials.
Wire EDM Machining：
Wire EDM uses a charged wire to cut conductive materials with extreme precision. Unlike sinker EDM, it can’t produce blind cavities, but it excels at intricate shapes and thin features.
Need Engineering Input? Let’s Talk
Not sure if sinker EDM is the right fit? Our engineers can review your design and recommend the best manufacturing approach.
FAQs About Our Sinker EDM Applications
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