edm hole drilling machines

EDM Hole Drilling Machine

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How It Works

Non-Contact Erosion: Instead of a physical cutting edge, it creates rapid electrical sparks (500 to 30,000 sparks per second) that locally melt and vaporize the metal. [1, 2]

Tubular Electrodes: Uses hollow brass or copper tubes as electrodes, ranging from roughly 0.1 mm to 6 mm in diameter. [1, 2]

Dielectric Fluid Flushing: High-pressure deionized or tap water is pumped through the hollow electrode to act as a resistor, stabilize the arc, and flush away eroded debris

Categories: Job Works, Machines

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Key Capabilities & Specifications

Material Versatility: Drills through hardened steel, tungsten carbide, titanium, and superalloys without the bit wandering or breaking.

High Aspect Ratios: Can achieve depth-to-diameter ratios exceeding 200:1 or even 300:1 (such as drilling a 1 mm hole very deep into tool steel).

Complex Angles: Capable of entering curved or inclined surfaces without “walking” off-mark like standard drill bits. [1, 2, 3, 4]

Common Applications

Starting holes for wire EDM cutting

Cooling channels in aerospace turbine blades

Removing broken taps, drills, or fasteners from expensive workpieces

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