Founded in 1955 by John W. Heaton in Aiken, South Carolina, Precision Machine Works is a complete CNC machine shop. Our 35,000 square-foot contract machining facility serves the pharmaceutical, fiberglass, defense, and firearms industries, among others.. More than a traditional machine shop,Precision Machine Works specializes in the machining of exotic materials. Whether your project involves high temp alloys,copper,Inconel,aluminum,or titanium,our CNC machine shop can handle the job with accuracy and skill.