Precision gear solutions backed by over a century of innovation
With more than a century of experience, RENK America Marine & Industry, formerly Cincinnati Gearing Systems (CGS), based in Ohio, USA, is a recognised leader in the design and manufacture of precision gears and transmissions. More than just a gear manufacturer, we provide reliable, high-quality, cost-effective custom gear solutions for a wide range of power transmission applications in critical industries.
Founded in 1907, we have a proud tradition of innovation and engineering excellence. Our company offers complete gear design, manufacturing and repair services, supported by a state-of-the-art facility and a dedicated engineering team with more than 50 years of experience. Its award-winning staff includes licensed professional engineers and members of industry-standard organizations such as AGMA (American Gear Manufacturers Association) and API (American Petroleum Institute).
Advanced gear and transmission production from concept to completion
RENK America Marine & Industry is a full-service manufacturer of gears and transmission systems, including all rotating hardware such as high-speed pinions, shafts, and high-precision internal and external helical and spur gears. Our advanced machinery and in-house capabilities allow us to meet the most demanding requirements for precision turning and shaft grinding.
We specialize in custom gear components ranging in size from less than an inch to 157 inches in diameter. We offer single and double helical, spur, and planetary gears, as well as fully enclosed drive systems tailored to each customer's exact specifications. The company is IATF 16949 (International Automotive Task Force) certified and has more than 25 years of experience producing custom gears for major automotive OEMs and off-highway Tier 1 and Tier 2 suppliers such as Chrysler, Ford, and Detroit Diesel.
Proven solutions for demanding applications across critical sectors
RENK America Marine & Industry products are trusted in some of the world's most demanding environments, including
- Marine: Custom propulsion gears for commercial and military vessels
- Industrial: Gear systems for a variety of heavy-duty manufacturing operations
- Oil & Gas: Platform elevation gears, compressor and expander drives
- Power Generation: High-performance gears for turbines and generators
- Military & Defense: Over 50 years of support for U.S. Navy systems and programs
- Automotive: High-volume, precision gears and components for electrical drive systems
- Transportation: Off-highway and heavy-duty transit applications
We are an early pioneer in lightweight aluminum gear cases and aero-derivative gearing, optimizing power density and space efficiency in advanced applications.
Comprehensive repair, engineering, and testing for long-term performance
In addition to manufacturing, RENK America Marine & Industry offers comprehensive gearbox repair, rebuild, and testing—on-site or at our facility. Services include failure analysis, reverse engineering, design upgrades, and full functional testing with warranties on materials and workmanship. Every product is built to the latest industry standards and certifications, ensuring long-term performance and value.
Discover your next career opportunity
We are seeking dedicated professionals to join our growing team and contribute to our continued success.
Explore our current job openings and become part of our journey.
Want to share your point of view?
The purpose of this survey is to measure customer satisfaction levels by evaluating Cincinnati Gearing Systems' (CGS) areas of strength and opportunities for improvement. The 2024 Customer Satisfaction Survey is open to companies that placed an order or submitted a quote to CGS in 2023. If you submitted a quote but did not place an order this past year, please skip to section D. Thank you in advance for your participation.
Get in touch with our experts!
With three manufacturing facilities RENK America Marine & Industry LLC. has over 160,000 square feet ready to exceed customer expectations.
301 Milford Parkway
Milford
OH 45150
United States of America
201 Milford Parkway
Milford
OH 45150
United States of America