Founded in the Detroit area in 1973, Graphite Machining, Inc. manufactures and precision-machines graphite, carbon, and graphite-composite parts, taking projects from raw material through finished components. Its facilities in Michigan and Pennsylvania include more than 125,000 square feet of manufacturing space and over 150 pieces of automated machining equipment, supporting parts ranging from small heating elements to exceptionally large fabricated assemblies. Through its sister company, Advanced Carbon Technologies, GMI also provides in-house high-temperature purification with purity levels below 5 ppm total ash.
Advanced Carbon Technologies, IncFounded in 1992 as a captive purification facility for a local graphite machine shop, Advanced Carbon Technologies now provides high-temperature purification and produces pyrolytic graphite for demanding industrial applications. Its Topton, Pennsylvania operation has more than 25,000 square feet of manufacturing space and 11 vacuum induction furnaces, supporting projects from exploratory testing through production with rapid turnaround. ACT is part of the GMI Family of Companies, which also provides related graphite machining capabilities.ROBESONIA, PA
Semco CarbonSince 1971, Semco Carbon has specialized in custom machining carbon and graphite components, working exclusively with these materials from its Lorain, Ohio facility. Its 45,000-square-foot operation handles everything from prototype and repair work to parts made from raw blocks exceeding two tons, while maintaining nearly 400 tons of graphite inventory for quick production and direct material sales. Semco also purchases obsolete carbon and graphite for reclamation or appropriate disposal.LORAIN, OH
Graphel Carbon ProductsFounded in Cincinnati in 1965, Graphel Carbon Products makes precision graphite components and EDM electrodes while supplying the materials and tooling behind those applications. Its engineering and machining teams support demanding work in aerospace, power generation, medical and tool-and-die manufacturing from three production facilities in Ohio, Minnesota and South Carolina. Graphel is also one of the world’s largest Entegris Poco EDM Graphite distributors, and its Ohio and South Carolina facilities are ISO 9001 and AS9100 certified, with Nadcap and ITAR compliance.WEST CHESTER, OH
MWI, IncFor more than 50 years, MWI, Inc. has engineered and machined carbon and graphite products, with a particular foothold in EDM and high-temperature applications. Its engineers work alongside customers on material selection, part design and even reverse-engineering legacy components, while four carbon-and-graphite research laboratories support application development. MWI is ISO 9001:2015 and ITAR certified for the distribution and machining of carbon-based products.ROCHESTER, NY