G.L. Heller Co. is a family-owned Whitehouse, Ohio machine shop that has produced precision CNC-turned and milled parts and waterjet-cut components since 1972. Started by Gary and Jean Heller in their home garage, the company remains owned by the Heller family and now operates from its original location in a 38,000-square-foot shop. Its production work is backed by ISO 9001:2015 certification and a climate-controlled inspection lab.
ISO 9001:2015
Center-Line Machining LLCFamily-owned and operated since 2007, Center-Line Machining produces custom precision-machined components from its Mentor, Ohio shop. Its experienced machinists, engineers, and programmers handle projects from prototype through production, with in-house CNC turning and milling supported by detailed inspection and approved outside services. Center-Line is ITAR compliant, ISO 9001:2015 compliant, and AS9100D compliant.MENTOR, OH
Triangle Machine ProductsFamily-owned and operated for four generations, Triangle Machine Products has remained in business since 1957, building its reputation on integrity, common sense, and hard work. From its 47,000-square-foot Cleveland-area facility, the company makes precision CNC-turned components for OEMs and other manufacturers, supporting both prototype work and high-volume production. Triangle employs 40 people and holds ISO 9001:2015 and IATF 16949:2016 certifications.CLEVELAND, OH
Coleys IncColeys Inc. grew from a Vermilion garage shop founded in 1968 into a third-generation, family-run CNC manufacturer making tight-tolerance components for demanding industries. Its Ohio facility operates around the clock with more than 50 high-capacity machining, turning and sawing centers, along with in-house prototyping and inspection. Coleys also holds ISO 9001:2015 certification and acquired Automatic Parts in 2009 to add Swiss and screw machining.VERMILION, OH
Hillman Precision, IncFounded by Geoff Hillman Sr. in an 800-square-foot garage in 1991, Ashland-based Hillman Precision now produces CNC-turned and milled parts in a 37,000-square-foot manufacturing facility. The family-owned company has been operated with sons Sam and Brian since 2001, serving sectors including pumps, medical equipment and firefighting while also offering warehousing for just-in-time deliveries. Hillman Precision works according to ISO 9001:2008 guidelines and received the Ashland Area Chamber of Commerce’s Small Business of the Year award in 2007.ASHLAND, OH