Sinker EDM

Complex shapes with exceptional precision

In today’s precision industry, components are becoming increasingly complex and tolerances ever more stringent. Especially in the manufacture of molds, formed parts, and functional precision components, conventional machining techniques are often no longer sufficient. In such cases, sinker EDM offers an extremely accurate and reliable solution. Just like wire EDM, sinker EDM is a specialty that Tumag has mastered down to the finest detail.

What is Sinker EDM?

Sinker EDM, also known as die-sinking EDM, is a machining process in which material is removed by means of electrical discharges between a shaped electrode and the workpiece. The electrode, which exactly matches the desired negative shape, is carefully “sunk” into the workpiece. The spark discharges locally melt and remove the material, allowing the shape to be reproduced with very high precision.

Ideal for complex geometries

One of the greatest advantages of sinker EDM is the ability to create highly complex shapes and details that are difficult or even impossible to achieve using conventional milling or turning techniques. These include sharp internal corners, deep cavities, fine structures, and complex 3D contours. These characteristics make sinker EDM particularly suitable for the production of molds, punches, tooling, and precision components requiring high form accuracy.

Machining hard and sensitive materials

Sinker EDM is often applied to very hard materials such as hardened steel, carbide, and other wear-resistant alloys. Because the process exerts no mechanical forces on the workpiece, material hardness is not a limiting factor. In addition, this technique is especially well suited for machining delicate or thin-walled components, where the risk of deformation or stress buildup is minimized.

Tight tolerances and reproducible quality

Thanks to a high level of process control, sinker EDM makes it possible to achieve extremely tight tolerances. Dimensional accuracy and surface quality are consistent and reproducible, which is essential for series production and high-end applications. Tumag’s expertise in sinker EDM enables us to manufacture precision components that meet the highest quality requirements of our customers.

Technological expertise at Tumag

Tumag continuously invests in modern sinker EDM machines, high-quality electrode production, and advanced measurement and inspection techniques. Combined with the in-depth knowledge and experience of our employees, this results in a stable and reliable production process. We actively collaborate with our customers, both during the design phase and throughout production, to achieve an optimal end result.

Your partner for Sinker EDM

Whether it concerns single parts, prototypes, or small to medium-sized series, Tumag offers a flexible and quality-focused approach to sinker EDM. Thanks to our technical know-how and focus on precision, we are a reliable partner for demanding applications across a wide range of industries.

Would you like to learn more about our expertise in sinker EDM or discuss what we can do for your project? Feel free to contact us without obligation.