Small Hole EDM Drilling Machine PDD703.30

A Small Hole EDM Drill Machine—also known as a hole popper or EDM drilling machine—is a specialized type of Electrical Discharge Machining used to drill very small, precise holes in hard, conductive materials. It is especially useful where traditional drilling methods would fail due to tool breakage or material hardness

The DD703.30 CNC Electric Spark Drilling Machine is a precision-engineered small hole EDM machine used for drilling fine and deep holes that are difficult or impossible to achieve using conventional drilling methods. It operates on the electrical discharge machining principle, allowing accurate hole drilling in hardened steel, carbide, copper, and other conductive materials.

This machine is ideal for applications such as start hole drilling for wire cut EDM, cooling holes, injector holes, and precision components. With a rigid structure, stable electrical system, and CNC-controlled axis movement, the DD703.30 ensures consistent accuracy, smooth operation, and long service life.

1. Micro Hole Drilling: Capable of drilling very small holes (typically 0.1 mm to 3 mm diameter).
2. Deep Hole Capability: Can drill holes with very high depth-to-diameter ratios (e.g., 100:1).
3. Hard Material Machining: Easily drills hardened steels, carbide, titanium, Inconel, etc.
4. No Mechanical Contact: Non-contact process = no tool pressure or deformation.
5. Rotating Electrode: Uses a rotating, tubular electrode (usually brass or copper).
6. Dielectric Flushing System: High-pressure dielectric fluid is pumped through the electrode to cool and flush debris.
7. Precision and Repeatability: Accurate positioning and consistent hole size, often with CNC control.
8. CNC or Manual Operation: Available in both manual and CNC-controlled versions.
9. Angle Drilling: Can drill angled holes with tilting or rotary axis options.
10. Automatic Electrode Feeding: Many machines offer auto electrode feeding for continuous drilling.
11. Compact Design: Often small and space-efficient—ideal for tool rooms or precision workshops.
12. Low Tool Wear: Electrodes last longer compared to conventional drills in hard materials.
13. Hole Diameter: 0.3 mm – 3.0 mm
14. Materials: Hardened steel, tungsten carbide, titanium, Inconel
15. Electrode Material: Brass, copper, or copper-tungsten tubes
16. Depth-to-Diameter Ratio: Up to 100:1 or more
17. Axes: Usually 2-axis or 3-axis, some with rotary table for angular holes

Similar to wire EDM, but instead of a wire, a rotating tubular electrode is used.

A high-frequency electric spark erodes the material to create a hole.

Deionized water or dielectric fluid is pumped through the electrode to cool and flush debris.

No physical contact = no mechanical stress on the workpiece

Start holes for wire EDM operations

Cooling holes in turbine blades (aerospace)

Oil holes in automotive parts (e.g., fuel injectors)

Micro hole drilling in medical devices and electronics

Hard-to-machine materials like carbide and Inconel

Can drill extremely small, deep holes in tough materials.

Works on any electrically conductive material.

No tool wear like conventional drilling.

Perfect for starter holes that would be too difficult to begin with a wire EDM

1. Machine Lamp

2. Working Fluid System

3. Workbench Water Retaining Cover

4. DRO(Digital readout) fitted with linear scale

5. High Pressure Water Pump

6. Operation Manual