Micro-erosion is a specialized sub-discipline of spark erosion (EDM – Electrical Discharge Machining) that focuses on extremely fine material removal in areas such as grooves, cavities, and flow channels previously shaped by roughing or semi-finishing erosion passes.
Although similar in principle to a finishing pass, micro-erosion is specifically intended to refine and enhance erosion structures, rather than merely improving dimensional accuracy. It targets the smallest details of a workpiece to optimize geometry, surface quality, and structural definition.
Key characteristics
- Ultra-fine erosion performance – Ideal for delicate features, microstructures, and narrow gaps
- High precision and definition – Even in highly complex or hard-to-reach geometries
- Surface refinement – Smoother surfaces with reduced roughness and improved edge sharpness
- Minimal thermal influence – Gentle processing thanks to low discharge energy and optimized spark gap control
Typical applications
- Precision toolmaking – Final contour shaping and detailing of micro-features
- Medical technology – Machining of implants, surgical tools, or micro-components
- Aerospace and high-tech industries – Refinement of turbine channels, fuel injection nozzles, and microfluidic structures
Product recommendation
For demanding micro-erosion tasks requiring maximum precision, spark stability, and process control, we recommend our specially developed microcut® EDM wire. Engineered for fine-scale erosion with small diameters, it ensures consistent spark performance, minimal wire wear, and excellent surface finishes.
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