What began in 1967 as a two-car-garage tool shop has become Rhinestahl Corporation, a Mason-based manufacturer of aircraft engine tooling and complex precision assemblies. Its Customer Tooling Solutions division supplies OEM-aligned engine tooling, while its Advanced Manufacturing Group handles demanding machining, fabrication, and capital-equipment assembly for aerospace and other industries. Rhinestahl’s manufacturing operations include a 125,000-square-foot Mason facility, and its AMG division holds AS9100D/ISO 9001 and ITAR certifications.
AS9100D:ISO9001
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ITAR
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ISO 9001:2015
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CFM LEAP Certified Supplier
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Momentous Mold & MachineMomentous Mold & Machine traces its roots to Karl A. Reuther’s 1950 family business in Cuyahoga Falls, where it first became known for rubber molding before moving into demanding aerospace work. Purchased in 2025 by a Northeast Ohio management team, the company now brings that long manufacturing history to custom tooling for aerospace and related high-consequence applications. Its 60,000-square-foot temperature-controlled shop is supported by AS9100D:2016 with Design and ISO 9001:2015 with Design certifications.CUYAHOGA FALLS, OH
Princeton ToolKen Bevington started Princeton Tool in 1997 in the basement of his family’s home, and the Mentor, Ohio company has since become known for precision work supporting aerospace and industrial gas turbine programs. Today, Princeton Tool operates more than 135,000 square feet of manufacturing space with over 150 employees across four states, and its quality system is certified to AS9100D and ISO 9001:2015.MENTOR, OH
Meyer Tool, IncFounded in Cincinnati as Meyer Tool & Die in 1951, Meyer Tool manufactures precision airfoils and hot-section turbine components for the aerospace and gas turbine engine industries. The privately held company has grown to more than 1,600 employees across twelve facilities worldwide and operates over 1,400 EDM machines, making it North America’s largest EDM shop. Meyer provides integrated new-make, repair and overhaul work and holds AS9100, ISO 9001:2015 and Nadcap certifications for its special processes.CINCINNATI, OH
Olympic Tool & Machine CorpServing aerospace customers since 1960, Olympic Tool & Machine Corp. is a 100-employee machine shop in Aston, Pennsylvania, known for producing fully traceable flight-safety parts and assemblies. Its 65,000-square-foot facility supports customers from prototype work through completed machined parts, with nondestructive testing performed on-site since 1985. The company’s long record includes Boeing supplier recognition and AS9100 certification.ASTON, PA