ECM – Electrochemical machining

The most thorough process in surface treatment

Electrochemical machining (ECM) is the collective term for a wide variety of metal processing methods – such as deburring, drilling, countersinking and plating. The process is highly precise, reliable, economical and clean at the same time. In addition, almost all metals – even high-alloy materials such as nickel-based alloys, stainless steel alloys or hardened materials – can be machined easily and efficiently with ECM machines.

Electrochemical machining is used in many industries, such as aerospace engineering, automotive, toolmaking, medical technology and the energy industry.

ECM technology from stoba Customized Machinery: The right solution for every problem

Our ECM technology is used whenever the high-precision, constant, high-quality and fast machining of metallic workpieces and components is crucial. To this end, our team of experienced and competent engineers together with our customers always develops the best possible solution for their individual requirements - that is innovative, reliable and individual.

Frank Heckelsmüller

"Hello - I'm Frank Heckelsmüller and your expert for ECM machines"

Would you like to automate your ECM processes, do you need a new machining tool, or are you interested in an ECM system? Then get in touch with me. I look forward to hearing from you!

+49 8331 98487-179

Particularly versatile: The application possibilities of ECM

ECM machines from stoba can adapt any machining process to your wishes and individual requirements, regardless of the complexity of the workpiece.


ECM Deburring
ECM Forming
ECM Drilling
ECM Cross-Drilling

How does ECM work?

When using ECM, the workpieces are processed by the anodic dissolution of metal. For this purpose, the workpiece (anode) is mounted on a fixture, a cathode serves as the processing tool. It triggers the high-precision machining process by flushing the electrolyte fluid under direct current to where the workpiece is to be machined. An electric charge is generated in the narrow gap between the cathode and the workpiece. This causes an electron transfer from the workpiece, which is necessary for the exact removal of the desired material.

The shape of the cathode is decisive in the process: it determines the final shape of the workpiece or the impression placed on the workpiece (tomography).

In order to maintain a constant electrolyte quality and thus equally good conductivity, the material that is removed during the electrochemical process must be filtered out of the electrolyte.

When is electrochemical metalworking used?

  • For all electrically conductive materials
  • In places difficult to access
  • To deburr surfaces accurately to size
  • For the production of defined radii or edge breaks
  • For thin-walled, filigree and complex workpieces
  • When contours and holes need to be created

ECM – a reliable process in the industry

The ECM method is as simple as it is ingenious: The cathode of stoba is designed in such a way that it does not touch the workpiece surface – this means that there is no process-related tool wear. In addition, by using stoba generators developed in-house, we can optimize the removal process to such an extent that maximum time savings are achieved while maintaining the best possible quality.


What advantages does ECM have over other metalworking processes?

  • Minimum process time, especially through the use of multiple fixtures
  • Especially efficient for components with complicated and difficult to access shapes
  • Structural stability, as there is no contact and processing takes place at room temperature
  • Minimum machining tolerance
  • High reproduction volume
  • No process-related tool wear (cathodes)
  • Smooth transitions and high-quality surfaces without burrs

No matter where the shoe still pinches – we will not leave you alone

Many companies do not have the right tools themselves to process their components the way they want. With our electrochemical metalworking technology, we support our customers - for the most diverse challenges and applications. Our know-how, our interdisciplinary expertise and integrated systems enable us to find solutions for individual cases and to shape the manufacturing of tomorrow. We take on every challenge!  

Our experts accompany the entire ECM process

  • Construction of the cathode exactly aligned to the workpiece to be processed
  • Control and adjustment of the corresponding devices
  • Definition of the best electrolyte for the application, including NaCl, NaNO3
  • Individual development of solutions
  • Performance of tests
  • Improvement suggestions

ECM systems