Electrical discharge machining (EDM): How is it applied and what are its advantages in the aerospace industry?

Electrical discharge machining (EDM) is a revolutionary technique in the machining industry. It has become a mainstay in the aerospace industry, enabling the manufacture of components with a complexity and precision that was previously unattainable.

At Precision Manufacturing Aerospace (PMA), we embrace this cutting-edge technology to transform and elevate aerospace production standards. In doing so, we guarantee results that exceed expectations in terms of quality and performance.

In this article we will look at the types of EDM machining, its specific applications and the unique advantages it offers in the aerospace industry.

What is EDM?

EDM stands for “Electrical Discharge Machining”. This process, also known as EDM, is a non-conventional machining technique based on the use of electrical discharges to shape metal parts.

Traditional machining methods, which require physical contact between the cutting tool and the material to be machined. However, EDM works by generating a series of electrical sparks between the tool and the workpiece.

These sparks produce an extremely high temperature that is capable of melting or vaporizing the material at very specific points. This allows the part to be shaped as required.

Types of EDM machining

This machining is divided into two main categories, each with its own specific characteristics and applications:

  • Wire EDM (Wire EDM)

In this type of machining, a thin conductive wire, commonly made of materials such as copper or brass, is used to make extremely precise cuts in conductive materials. This method is characterized by its ability to produce fine, detailed cuts with high precision, making it ideal for complex contours and fine details in component manufacturing.

  • Die Sinking EDM (Die Sinking EDM)

Here, specifically shaped electrodes are used to create cavities or shapes in the material. This suits to the needs of aerospace components with complex geometries that are very difficult to achieve with traditional machining techniques.

Both types have in common the ability to work with extremely hard materials and the advantage of not generating mechanical stresses in the parts, making them ideal for applications where material integrity and precision are critical.

What are the uses of EDM in the aerospace industry?

EDM in the aerospace industry is used to manufacture a wide range of critical components. Its advantage: the ability to handle difficult materials. Some of the most common part types include:

  • Engine components: aerospace engine parts, such as turbine blades, fuel injectors and cooling system components, often feature complex shapes and are made of high-temperature resistant superalloys.
  • Structural parts: structural elements such as supports, frames and reinforcements, which require high precision in their manufacture to ensure the integrity and safety of the aircraft, can be efficiently manufactured using this type of machining.
  • Avionics systems: electronic and avionics components, including electronics housings, connectors and precision assemblies, benefit from the precision and capability of this machining, ensuring the reliability and functionality of critical aircraft systems.


At PMA, we are proud to have state-of-the-art EDM technology, including both wire-cutting and plunge EDM machines.

Our dedication to excellence and innovation allows us to offer comprehensive solutions in the design, machining, processing and quality of machined parts for the aerospace industry.

With PMA, your projects will reach new heights thanks to our precision and advanced technology, contact us!