Twin City Die Castings Company is a full service provider of precision Aluminum and Magnesium die castings. Founded in 1919 i ... n Minneapolis, Minnesota, TCDC has grown to three IATF/TS-16949:2016 Certified US locations and is now an employee owned company. A leader in die casting technology and machining, TCDC maintains 240,000 sq. feet of space and 23 die cast machines ranging in size from 350 to 1000 tons. TCDC is firmly dedicated to leading the die casting industry in technology, and has continually reinvested in modernization and productivity improvements, with capital expenditures averaging $3.5 million per year since 1998. read more