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Small hole

Small hole machining in EDM is a high-precision micro-hole process. A small hole EDM machine or small hole EDM drilling machine uses electrical discharge erosion to form very small, deep holes in conductive materials, suitable for cases where conventional drilling cannot work stably.

In production, it is often combined with deep hole EDM drilling for designs such as cooling passages, fine flow channels, and internal vent holes that require high aspect ratio machining.

Typical applications include injection mold vent holes, fuel nozzle holes, and micro channels in medical parts.

When hole diameters are too small for mechanical tools, EDM provides stable discharge control to reduce cracking and hole deviation.