PECM – Precise Electrochemical Metal Machining

Precise Electrochemical Metal Machining (PECM) – non-contact and accurate

PECM stands for Precision Electrochemical Metalworking and is a technically advanced electrochemical machining process. The process is ideally suited to produce very precise 3D molds with the best quality.

stoba Customized Machinery supplies PECM machines for the production of tooling applications in small quantities as well as for the production of large numbers of workpieces in fully automated production lines with integrated pre- and post-treatment processes for the workpieces.

„Hello, my name is Hans-Joachim Konietzni and thanks to decades of experience I am your expert for PECM machines.“

You would like to find out whether PECM technology is right for you? Then please contact me. I look forward to your inquiry!


+49 8331 94248546 

PECM is the further development of the ECM countersinking process

With PECM machines from stoba Customized Machinery, you can manufacture with high precision and economically – without process-related tool wear. Absolutely contact-free and without thermal or mechanical influences, you can produce workpieces with an imaging accuracy and repeatability in the lower micrometer range and a surface quality of up to 0.03 µm.


PECM Countersinking

PECM Countersinking

How does PECM countersinking work?

  1. Open working gap: fresh electrolyte is supplied

  2. Close working gap: Tool electrode (cathode) and workpiece (anode) approach each other to within a few microns, then a controlled current pulse is triggered. This is how the surface material is anodically removed from the workpiece

  3. Open working gap: The electrolyte is rinsed out of the working gap with the ablation products

PECM – perfectly adapted to your needs

When is Precision Electrochemical Metalworking used?

  • For all electrically conductive materials that require a maximum of accuracy
  • When creating a predefined 3D surface profile
  • For components where burr formation is a major challenge

Precise and economical working

Precise Electrochemical Metal Machining (PECM) opens up completely new possibilities for precise surface treatment: components are manufactured to exact dimensions, the problem of burr formation is eliminated. Subsequent surface processes are almost superfluous.


What advantages does PECM have over other metalworking processes?

  • Finest deburring results that are difficult or impossible to achieve with other machining processes
  • Suitable for finishing components that are difficult to handle with other processes
  • Low production time compared to conventional machining methods
  • High productivity, as several components can be processed simultaneously
  • Long service life of the workpiece, because mechanical or thermal loads do not affect the material
  • High economic efficiency, as no tool wear
  • PECM machines can be easily automated and implemented in a production line

We develop for your needs

Our process experts develop total solutions that are fully adapted to your  requirements. Committed, precise, successful.


Our experts accompany you through the entire 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

PECM Countersinking systems

PECM special systems