Metalworking

Graphite Machining – Precision & Clean Manufacturing for Technical Applications At EROSIÓN DE PRECISIÓN EROPREC, S.L. (ERO-PREC), we offer high-precision graphite machining services for industries that demand accuracy, cleanliness, and high-performance materials. Graphite is an ideal material for applications requiring electrical conductivity, thermal resistance, and dimensional stability — such as EDM, foundry molds, aerospace, metallurgy, and electronics. Thanks to our specialized CNC equipment and decades of expertise, we produce complex graphite parts with tight tolerances and superior finish, whether for individual prototypes or small production batches. Why Graphite? Graphite is lightweight, electrically and thermally conductive, and stable at high temperatures. Its machinability and resistance to wear make it ideal for both industrial and high-tech applications. At EROPREC, we work with a wide range of technical graphite grades to meet your exact functional and dimensional requirements. Benefits of Graphite Machining with EROPREC High dimensional precision on fragile or intricate components Clean dry machining with dust containment and controlled environments Tailored parts produced to drawing or 3D model CNC machining of all industrial graphite types: isostatic, extruded, molded, impregnated In-house expertise in EDM graphite electrode design and manufacturing Common Applications Graphite electrodes for sinker EDM Non-ferrous casting molds (aluminum, copper, brass) High-temperature thermal components Brushes, electrical contacts, furnace parts Insulating rings, nozzles, guides, and custom parts Graphite Grades We Machine Isostatic graphite (high-density, fine-grain – ideal for precision EDM) Molded and extruded graphite (durable and cost-efficient) Synthetic graphite (low porosity, high purity) Impregnated graphite (for chemically or thermally demanding applications)

Sinker EDM (Die-Sinking EDM) – Precision Machining of Cavities, Molds, and Intricate Internal Features At EROSIÓN DE PRECISIÓN EROPREC, S.L. (ERO-PREC), we offer advanced sinker EDM (Electrical Discharge Machining) services for the production of components with complex internal geometries, deep cavities, and materials that are difficult to machine using conventional methods. With over 30 years of experience and state-of-the-art EDM technology, we provide high-precision, burr-free results for industries that demand excellence, such as aerospace, automotive, medical, energy, tooling, and mold manufacturing. What Is Sinker EDM? Sinker EDM—also known as die-sinking or cavity-type EDM—is a non-contact machining process that uses an electrode (typically made of copper or graphite) to erode material from a conductive workpiece through electrical discharges. The electrode is shaped to match the negative of the desired cavity, allowing for highly detailed and accurate internal features. Key Benefits of Sinker EDM at EROPREC Machining of complex geometries: including deep cavities, internal angles, fine engravings, and blind holes No mechanical contact: eliminates part distortion, stress, or deformation Extremely high accuracy: micrometric tolerances on internal and difficult-to-reach surfaces Ideal for hard or exotic materials: including heat-treated steels, Inconel, titanium, carbides, and more Smooth, clean surface finishes: reducing or eliminating the need for post-processing Materials We Machine Using Sinker EDM Hardened tool steels and alloy steels High-performance superalloys (Inconel, Waspaloy, Hastelloy) Titanium and titanium alloys Tungsten carbide, molybdenum, and other hard metals Copper, graphite, aluminum, and conductive bronze Common Applications Injection mold cavities and precision die tooling Progressive stamping dies and press tools Deep grooves, micro-channels, and internal profiles Technical engravings and shaped electrodes Complex components with sharp internal corners

Precision Inconel Machining At EROSIÓN DE PRECISIÓN EROPREC, S.L. (ERO-PREC), we are specialists in the machining of Inconel parts, a family of nickel-based superalloys known for their outstanding mechanical strength, heat resistance, and corrosion resistance. Thanks to our decades of experience, state-of-the-art CNC and EDM technology, and a highly skilled team, we deliver precision components for demanding industries such as aerospace, energy, automotive, and chemical processing. What is Inconel and Why Is It Challenging to Machine? Inconel is a group of nickel-chromium-based superalloys designed to perform in extreme environments. Its high strength, low thermal conductivity, and work-hardening behavior make it difficult to machine using conventional methods. That’s why only expert shops like EROPREC—equipped with advanced processes such as wire EDM and die-sinking—can achieve precise and consistent results when working with Inconel. Benefits of Inconel Machining with EROPREC Advanced CNC & EDM Technology: We combine high-performance CNC machining with electro-discharge machining (EDM) to tackle complex Inconel geometries and reduce thermal stress. Extreme Dimensional Accuracy: We achieve micrometric tolerances in both single components and small series production. Exceptional Surface Finish: We provide low-roughness surfaces, free from burrs or microcracks, even on difficult-to-machine areas. Thermal & Structural Integrity: Our processes minimize deformation and preserve material properties under demanding conditions. Full Traceability: Every component is manufactured under strict quality protocols and traceability standards. Typical Inconel Components We Machine Turbine blades, nozzles, and exhaust system parts Valves, couplings, and connectors for oil & gas Aerospace structural elements and engine parts Heat exchangers, pressure vessels, and high-temperature assemblies Custom parts for corrosive and high-stress industrial applications