Ram EDM Companies

IQS Directory provides a detailed list of ram EDM companies and suppliers. Find ram EDM companies that can design and engineer ram EDM services to your specifications. Peruse our website to review and discover top ram EDM companies with roll over ads and complete product descriptions. Connect with the ram EDM companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for orbiting ram EDM, EDM ram plunge sinker, ram EDM consumables of every type, IQS is the premier source for you.

  • Waukesha, WI 800-798-9228

    XACT Wire EDM Corp. is one of the largest and most experienced Wire EDM Companies in the country. Our Wire EDM manufacturing capabilities include a large number of high-end machines with two locations offering advanced CMM and video inspection. We work with a wide variety of customers in the medical, defense, aerospace, automation, robotics industries as well as many companies in the metal machining, tooling & stamping industries. We are ISO 9001:2015 certified. Contact us today to learn more!

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  • 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 & is known to give both 100% in quality & service. Our flexibility & versatility provide customers with affordable convenience.

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  • Farmington, CT 860-677-2895

    Founded in 1956, we have become a premier manufacturer of precision components and assemblies at Mallory Industries. Our services include CNC turning & high-speed vertical milling, gearing, multi-axis turning, and wire electrical discharge machining. We are ISO 9001:2015 and AS9100D certified and guarantee high-quality products. We work closely with our customers to provide superior solutions at lower costs to give them the most success in their industries.

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  • South Bend, IN 574-289-2441

    South Bend Form Tool is an ISO 9001:2015 custom certified manufacturer of tools and dies with general contract machining and tooling services. South Bend Form Tool uses the latest technologies to provide quality services. All our equipment is serviced regularly. All our equipment meets or exceeds industry standards for accuracy and product quality.

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  • Cincinnati, OH 513-521-8292

    At RB Tool & Manufacturing, we are committed to delivering the highest quality products and services to our clients. We understand the importance of precision and accuracy in manufacturing, and we work tirelessly to ensure that every project we undertake meets our strict quality standards. Contact us today to learn more about how we can help you with your EDM and precision engineering needs.

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Ram EDM Industry Information


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

Quick links to Ram EDM Information

Applications of Ram EDM

Industries that commonly use electrical discharge machining include aerospace, medical, tool and die, automobile, and military. Ram EDM is ideal for such applications as injection mold tooling, micro hole drilling, keyways, washers, and scientific research apparatus, as these applications often require high tolerances and precision components.

Process of Ram EDM

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 workpiece (the material being processed), the electrode is used to generate a series of sparks and is connected to the workpiece through a power supply. There is no actual contact between the electrode and the workpiece, 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.

Advantages and Disadvantages of Using Ram EDM

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 workpiece is not deformed from any impact, as there is no direct contact between the electrode and the material, and the workpiece 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.