Overton Chicago Gear Employee Directory
Machinery ManufacturingIllinois, United States51-200 Employees
Overton Chicago Gear (OCG) is a machinery manufacturer based in Addison, Illinois, with roots dating to 1888. It produces large, high-precision gears and gearboxes for demanding applications across oil and gas, minerals and mining, rail, renewable energy, power generation, and infrastructure. OCG offers custom gears across profiles such as herringbone, bevel, helical, spur, and double enveloping worm, together with assembled gearboxes, and operates three manufacturing facilities in the Chicago area. The company serves customers that require reliable, durable gearing for mission-critical equipment, supported by a mid-sized workforce. In 2012, OCG was acquired by H-D Advanced Manufacturing Company of the Pittsburgh area.