Founded by a group of engineers, Willoughby-based Electrum Industries makes precision CNC-machined parts, scaling work from prototypes to production for customers in medical, aerospace, and energy. Its specialty is challenging 5-axis work backed by custom fixturing and inspection equipment capable of checking tolerances to .0001 inch. Electrum also provides assembly and continually develops its manufacturing procedures toward ISO 9001:2015 certification.
ISO 9001:2015
Quality CNC Machining, IncSince 1988, Quality CNC Machining has produced intricate, tight-tolerance components through precision Swiss machining and multi-axis CNC mill-turn manufacturing. The Willoughby company serves demanding aerospace, defense, medical and industrial customers with a skilled team, NIST-traceable inspection equipment and a quality system registered to AS9100D and ISO 9001. Its newer Citizen equipment includes two L32 machines installed in 2025.WILLOUGHBY, OH
TK Machining SpecialtiesFounded by Troy Kordenbrock, TK Machining Specialties is a Hamilton, Ohio precision machine shop known for taking on intricate geometries and other challenges that many shops avoid. It began with complex 5-axis milling and now helps aerospace, energy, hydraulics and high-performance manufacturing engineers move difficult parts from design into production. An in-house Zeiss Contura CMM supports its documented inspection process, which is calibrated annually to ISO 9001:2015 standards.HAMILTON, OH
Machining ConceptsFounded in 1994 by two Erie engineers, Machining Concepts has grown from a one-lathe, one-mill shop into a 20,000-square-foot precision machine shop with more than 28 machines. The company makes custom parts for demanding applications, taking projects from prototypes through production and supporting customers with coordinated secondary operations. Its work is certified to ISO 13485:2016 for medical devices and AS9100D for aerospace.ERIE, PA
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