Welcome to our Family of Companies
Email Us
530 Westgate Drive
Addison IL 60101
Call Us
Mail Us
2418 Greens Road
Houston, Texas 77032 USA
Call Us for help!


Family of Companies
The company currently has five businesses with 310
employees across 9 locations serving hundreds of
customers around the globe.

Overton Chicago Gear

Overton Chicago Gear is a full service manufacturer of open gearing and gearboxes. For more than 130 years, we have delivered high performance, precision gearing and gearboxes to heavy industry. We produce high-quality spur, helical, and bevel gears that meet each customer’s specifications and application. When you choose Overton Chicago Gear, you get a reliable supplier that delivers quality product, on-time and at a competitive price.

Crown Precision

Crown Precision is a state-of-the-art CNC machine shop specializing in high-precision CNC turning, milling, grinding, and component part assemblies. Our reputation for outstanding customer service comes directly from our quick responses, on-time delivery, and proven lean manufacturing principles. Crown Precision has the capability to manufacture parts to your blueprint specifications at the tightest tolerances using a wide range of materials including steel, aluminum, titanium, copper, bronze, and aircraft alloys.

Precision Aero

Precision Aero specializes in manufacturing close tolerance machined components for critical industrial systems including commercial and military aircraft, space shuttle, land based transportation systems. For over forty five years, Precision Aero has supplied original equipment manufacturers with the highest quality specialized parts, assemblies, and technical assistance. Our commitment to excellence, continuous improvement, and compliance results in high quality and product leadership.


Sungear is one of the world’s leading aerospace gear manufacturing companies. We manufacture high quality, complex, precision gears and sub assemblies for commercial and military aerospace applications, in both large production and small R&D quantities. Sungear maintains strong relationships, approvals, and certifications with a vast majority of the leading aerospace companies, and has achieved several of the highest quality credentials available in the industry.