Sinker EDM

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One of the two major types of EDM, sinker EDM differs from its counterpart wire EDM in terms of the type of electrode used. Read More…

Sinker EDM Sinker EDM, which goes by many names including conventional EDM, plunge EDM and ram EDM, produces parts by eroding materials in the path of the EDM tool using electrical discharges, or sparks that can generate heat anywhere from eight to twenty thousand degrees.

Leading Manufacturers

Rochester Hills, MI  |  248-608-2400

Our job shop offers electrical discharge machining (EDM). At Quad Precision Tool, our reputation of manufacturing tooling to exacting specifications is unexcelled. We machine conductible materials using wire EDM & conventional/CNC sinker EDM. We also do high speed EDM drilling & micro-hole drilling.

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Quad Precision Tool Co., Inc. $$$

Hudson, NY  |  800-775-1651

Saturn Industries offers the finest precision machining services: wire, sinker, and small hole EDM; laser-inspected centerless grinding; CNC milling; turning; and flat and contoured grinding to ±0.0002" tolerances. Serving today's highly complex EDM applications, we specialize in EDM electrodes.

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Saturn Industries, Inc. $$$

Costa Mesa, CA  |  877-467-9336

SWISS WIRE EDM is currently the only Electrical Discharge Machining facility in the area certified to ISO9001/2000, AS9100A & NADCAP. These certifications & our 17 top-of-the-line machines ensure exemplary quality & excellent turnaround. We offer wire EDM, plunge EDM & small hole EDM.

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Swiss Wire EDM $$$

Fridley, MN  |  763-783-7808

Twin City is ISO 9001:2000 certified for all simple & complex EDM services, in addition to many other services & their forte is producing difficult, complex parts through their state-of-the-art equipment & highly skilled staff. TC will perform the nearly impossible & are known to give both 100% in quality & service. Their flexibility & versatility provide customers with affordable convenience.

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Twin City EDM $$$

Los Alamitos, CA  |  562-596-2784

Our company has the capabilities and the know how that you can rely on to help you come up with a wire EDM product that will suit your needs. It is our hope that we are able to treat each and every customer like they are number one in hopes of turning first time customers into lifelong connections. We are able to work with almost any material no matter the hardness. Get in touch with our customer service division for more information today!

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Wire Tech EDM, Inc. $$$
placeholder image Quad Precision Tool Co., Inc. Saturn Industries, Inc. Swiss Wire EDM Twin City EDM Wire Tech EDM, Inc.

Sinker EDM, which goes by many names including conventional EDM, plunge EDM and ram EDM, produces parts by eroding materials in the path of the EDM tool using electrical discharges, or sparks that can generate heat anywhere from eight to twenty thousand degrees. One of the two major types of EDM, sinker EDM differs from wire EDM in terms of the type of electrode used.

Common sinker EDM electrodes include machined graphite, copper tungsten and brass. Die sinking EDM is ideal for applications such as injection mold tooling, micro hole drilling, keyways, washers and scientific research apparatus. Unlike wire EDM which can only be used in the processing of 2D parts, sinker EDM has the capability of machining 3D pieces. It does not require the pre-drilling of a hole for the electrode and so can be used for more complex geometries.

Consisting of an electrode and a work piece (the material being processed), the EDM electrode is used to generate a series of sparks and is connected to the work piece through a power supply. There is a highly conductive path established between the electrode and the work piece which creates an intense electric field the melts away the material. The electrodes and the work piece do not come into contact with each other; rather the dielectric bath conducts the current to melt away the material and then flushes away the unwanted debris.

Industries commonly served by electrical discharge machining include aerospace, medical, tool and die, automobile and military. One of the biggest advantages to using EDM machining is its ability to create complex and intricate parts with a high degree of accuracy. In CNC EDM processes, CNC machines are used to guide, monitor and control the EDM process, as well as CAD and CAM software. It can be applied to hard materials such as stainless steel, copper, graphite and other metals which are difficult to successfully machine with other conventional methods.

Furthermore, as there is no contact between the machine tools and the work piece, there is less chance for process damage to the part. It is not deformed by impact or by heat, nor are there burrs which need to be removed through secondary machining. Sinker EDM is used for more complex geometries where electrodes are used to erode the desired shape into the part or assembly. Sinker EDM has another advantage over wire EDM in that sinker EDM does not necessarily cut all the way through the material, thus producing parts that wire EDM cannot.