Since 1888, Chicago Gear - D.O. James Corporation has served the gearing and gearbox marketplace with exceptional quality and dependable service.
We pride ourselves on our quality, on-time deliveries and our competitive pricing. At Chicago Gear, our people make the difference, from state of the art engineering and manufacturing, to professional and friendly customer service. To us, our customers are not quick sales, but rather long term relationships.
Manufacturing in both the Chicago plant and in conjunction with its off-shore partners, Chicago Gear has established a full line of gearing and gearbox products, to compliment its quality and service efforts. Innovation and ever-increasing capabilities have always guided Chicago Gear's visions. This has proved a successful combination, yielding the comprehensive line Chicago Gear is proud to offer its customers.
Innovation and ever-increasing capabilities have always guided Chicago Gear's visions. This has proven a successful combination, yielding the comprehensive line Chicago Gear is proud to offer its customers.
To provide customers with a place to go with all their gearing and gearbox needs Chicago Gear also offers engineering and design services, jobsite service calls, breakdown service, and gearbox rebuilding or upgrading.




