Ram EDM

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It produces parts through eroding material in the path of an electrical field using electrical discharges, or sparks that can generate heat anywhere from eight to twenty thousand degrees. Ram EDM is used for more complex geometries where electrodes are used to erode the desired shape into the part or assembly. Read More…

Ram EDM Ram EDM, or electrical discharge machining, goes by many names including conventional EDM, sinker EDM and cavity type EDM.

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.

Ram EDM, or electrical discharge machining, which goes by many names including conventional EDM, sinker EDM and cavity type EDM, produces parts through eroding material in the path of an electrical field using electrical discharges, or sparks that can generate heat anywhere from eight to twenty thousand degrees. Ram EDM is used for more complex geometries where electrodes are used to erode the desired shape into the part or assembly.

Industries which commonly use electrical discharge machining include aerospace, medical, tool and die, automobile and military as these applications often require high tolerances and precision components. For extremely high precision requirements, CNC EDM machines are used to guide, monitor and control the electrical discharge machining process, as well as CAD and CAM software to ensure accuracy. Ram type EDM differs from its counterpart wire EDM in terms of the type of electrode used.

Consisting of an electrode and a work piece (the material being processed), the electrode is used to generate a series of sparks and is connected to the work piece through a power supply. There is no actual contact between the electrode and the work piece, but rather a conductive path that is established between the electrode and the material. Ram EDM can be applied to hard materials including stainless steel, copper, graphite, and exotic metals that would cause difficulties during conventional machining.

In addition, ram EDM is advantageous due to its ability to create complex and intricate parts with a high degree of accuracy. This process takes place in a bath of dielectric fluid, which prevents premature sparking and flushes away debris, conducts electricity between the electrode and the work piece and then flushes out the melted material.

Therefore, while using this process, the work piece is not deformed from any impact as there is no direct contact between the electrode and the material, and likewise the work piece is burr-free after completion and saved from heat damage because very little material-damaging heat is generated during the procedure.

Ram EDM has an advantage over wire EDM as well, because ram EDM does not cut all the way through the material, thus producing parts that wire EDM cannot. However, a disadvantage to ram EDM is the additional time and cost necessary to create electrodes. Common plunge EDM electrodes include machined graphite, copper tungsten and brass. Ram EDM is ideal for applications such as injection mold tooling, micro hole drilling, keyways, washers and scientific research apparatus.