For more than 70 years, BB&H Tool Company has been an Ohio-based American manufacturer known for dependable work when downtime is costly. Founded in 1956, the Columbus machine shop provides CNC machining for customers in defense and aviation, supporting projects from prototypes through production.
Blue Ash Tool & Die Co., IncBlue Ash Tool & Die Co., Inc. has been a Cincinnati-area precision manufacturer since 1964, with a reputation built through six decades of work for commercial and government customers. Its 20,000-square-foot facility is best known for aviation ground-support tooling and complex machining, while an apprenticeship program dating to the 1970s has helped develop Ohio journeyman tool and die makers.BLUE ASH, OH
MarCon ToolSince 1959, MarCon Tool has made custom tooling and provided precision machining for aerospace and other manufacturing customers from Dayton, Ohio. Its work centers on CNC machining and precision manufacturing, backed by an in-house quality assurance focus.DAYTON, OH
Proficient Machining CoEstablished in 1973, family-owned Proficient Machining Co. makes precision CNC-machined and screw-machine parts for customers across industries including aerospace, medical, nuclear, and automotive. The Mentor, Ohio manufacturer combines a long-tenured workforce—with many employees staying 20 to 30 years—with capabilities ranging from one-piece prototypes to high-volume production. Its quality system is ISO 9001:2015 certified.MENTOR, OH
Challenge MachiningChallenge Machining is a veteran-owned Lima, Ohio, manufacturer known for pairing decades of machining experience with in-house engineering and problem solving. The full-service machine shop creates precise parts for customers across the Midwest, including defense and aerospace work, and handles projects ranging from prototypes to large production runs.LIMA, OH