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Small Hole Drilling with EDM


When conventional machining techniques are no longer effective, electrical discharge machining (EDM) is a popular method for removing conductive material from a workpiece. Given that it uses spark erosion to precisely remove metal from conducting materials, EDM is regarded as a non-traditional technique. EDM small hole drilling has become increasingly common as EDM technology and consumer demand for equipment. That can drill smaller, more precise holes have both advanced. Regardless of the material’s hardness, small hole EDM machines are used to drill, or “hole pop,” small holes into electrically conductive materials. For quickly drilling holes in materials that are difficult or impossible to manufacture, small hole EDM drilling is the best option.

For more than 50 years, spark erosion has been used in electrical discharge machining (EDM) to remove metal. Beyond its original usage as an EDM “popper” for creating holes in hard metals, another form, EDM drilling, has evolved for precision hole drilling in the smallest sizes.

With the use of EDM small hole drilling in conjunction with other methods, there is now no end in view for precision machining applications like small hole making. EDM is frequently used with other sophisticated machining techniques after being developed as an alternative to turning and milling. It has thrived as technology has embraced innovations in digital generators for more exact spark control and software that uses a history of machining data for more effective manufacturing.

Advantages of Small Hole EDM

A number of advantages are provided by small hole EDM, including:

Drills through any surface

With the application of small hole EDM, it is easy to cut on curved or inclined surfaces since the electrode does not come into touch with the material being cut.

Drilling on hard alloys

EDM small hole drilling is unaffected by hardness, making it the only drilling technique for some materials.

Drilling on soft metals

Metal drillings like aluminum and copper frequently produce chips that stick to cutters. Drilling of such materials is accomplished using small hole EDM without chip production.

Digging a deep hole

The only practical method for making deep small holes is small hole EDM drilling. Drilling can go deep down up to 20 inches. 

Straight holes

Straighter holes are difficult to create with standard drilling due to drifting. Here small hole EDM drilling works with its no-contact procedure.

Saves from damaged drills

As the electrode does not make any contact with the workpiece during small hole EDM drilling, incorrect torque conditions are minimized. In small hole, EDM machines, the ability to control diameter, depth, and hole placement increases and hence improves precision.

How does drilling a small hole work?

EDM Drills are a type of specialized EDM machining in which thin, hollow electrodes spinning around spindles are employed to drill small holes. A spark is produced after the electrode is electrically charged by a servo-controlled generator. Often, water is applied as a dielectric. Under pressure, the dielectric spreads out around the sparking region inside the component and passes through the electrode.

This technology makes it easier for the drill to enter the workpiece. In a controlled environment, the surface of the workpiece erodes to produce numerous tiny pockets that finally draw into a small hole. In contrast to human drilling, the depth of the holes is not controlled by the operators. The electrode diameter determines the hole’s diameter, and electronics regulate the hole’s deep position.

Precision hole drilling solution

For single prototypes, limited and large product runs, EDM hole drilling can provide precise drilling solutions. EDM hole drilling is used to create tiny holes through conductive materials, regardless of how soft or rigid those materials are. The EDM drilling station uses an electrode that revolves inside a chuck. That has a continuous flow of deionized or distilled water to drill holes. This water travels across the electrode acting as a dielectric and a cleansing agent.