State-of-the-Art Equipment & Facilities

Precision CNC machining of graphite and carbon
  • Lathes that handle up to 70" diameters
  • Saws that cut up to 96" thick by 132" long
  • CNC machining centers with travels up to 50" x 100"
  • CNC turning centers up to 28" diameter by 120" long

Our History
Graphite Machining, Inc. was founded in 1973 in the metro Detroit, Michigan, area. As the demand for GMI's machined and non-machined graphite increased, GMI outgrew its facility in Detroit and relocated to Metamora, Michigan, in 1988. The company continued to grow, and again needed to expand. In 1997, a new addition was added to the Metamora facility. With this new addition also came additional CNC machining and sawing equipment. Continued growth required a second facility in Topton, Pennsylvania, in February 2000. Then in 2006, a third facility was opened in Robesonia, PA.

Today GMI's machining facilities are among the world's finest. We have more than 125,000 square feet of combined manufacturing space, designed for efficient handling of your order from receipt of material to final packaging and shipping. Our substantial investment in equipment features over 150 pieces of automated machining equipment.

GMI, through its sister company, Advanced Carbon Technologies, can also provide in-house vacuum induction purification. High temperature purification services are available for 3 to 5 day turnaround, with purity levels of less than 5 ppm total ash.

Automated CNC Turing Centers are capable of machining graphite parts up to 28" in diameter

Topton, PA Facility


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