Small Hole EDM Drilling Machine EH43

High-Precision Small Hole Drilling for Hard-to-Machine Materials

Designed for deep, micro, and angled hole machining on flat,

inclined, and curved surfaces — where conventional drilling fails.

Stable Structure. Reliable Performance.

The EH43 Small Hole EDM Drilling Machine features a high-rigidity precision cast bed with aging treatment to ensure long-term stability and deformation resistance.
Its integrated machine and electrical control design minimizes connection points, delivering enhanced reliability and consistent machining accuracy.

Equipped with precision ball screws, high-accuracy linear guideways, and a carbide face-sealed rotary head, the machine is engineered for smooth operation and precise micro-hole drilling.
Fast-response spindle drive and intelligent control functions further improve efficiency in deep and small hole machining.

Technical Specifications(Small Hole EDM Drilling EH43)

Worktable Size	mm	500×380
X / Y Table Travel	mm	400×300
W-axis Travel	mm	300
Z-axis Travel	mm	380
Maximum Distance from Worktable Surface to Guide	mm	300
Electrode Clamping Range	mm	Φ0.2~Φ3.0
Maximum Load Capacity	KG	200
Maximum Current	A	35
Maximum Machining Efficiency	m/min	30-60
Overall Dimensions of Main Machine	mm	120011001900

Features(Small Hole EDM Drilling EH43)

High-rigidity precision cast bed, stress-relieved by aging treatment to ensure long-term stability without deformation.

Integrated machine design, featuring a semi-enclosed stainless-steel water tank and transparent acrylic protective panels.

Integrated electrical control system designed as one unit with the machine body, using minimal connectors to achieve maximum stability and reliability.

All motion components adopt precision ball screws and high-accuracy linear guideways to ensure long-lasting and stable machining accuracy.

Carbide face-sealed rotary head for improved durability and sealing performance.

Spindle equipped with a high-resolution stepper motor with rapid response function.

Secondary stroke with counterweight, enabling fast up-and-down movement, reaching 100 mm per revolution.

When the electrode is fully consumed, the spindle automatically retracts; the retraction height can be freely set to accommodate different electrode lengths.

Multi-stage voltage machining to suit different hole diameters.

One-key machining andone-key retract function (after setting workpiece thickness and allowance, press stop and the electrode automatically returns to the workpiece surface).

Standard fixed-depth machining function (optional automatic detection function to determine whether the electrode length is sufficient to complete a full fixed-depth hole).

Optional photoelectric breakthrough detection function, enabling semi-automatic machining.Standard electrode dressing and breakthrough functions.Optional configurations: manual oil pump, stainless-steel circulation water tank or standard stainless-steel water tank, and upper flushing system.

Application (Small Hole EDM Drilling EH43)

Small Hole EDM Drilling EH43 is mainly used for machining grouped holes on flat surfaces, as well as various inclined surfaces, curved surfaces, and deep micro holes that are difficult or impossible to process by conventional machining methods.
It is suitable for machining steel, aluminum, copper, castings, alloys, and titanium alloys.
The machine supports both blind holes and through holes with a diameter range of φ0.2–φ3.0 mm.

Basic Structure

The machine consists of the main machine, pulse power supply control cabinet, and operation control box.

Main Machine

The main machine is composed of the machine bed, column, X-axis, Y-axis, Z-axis, and W-axis (manual).