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RENK-MAAG means precision and engineering ingenuity from Switzerland.

RENK-MAAG GmbH in Winterthur develops and produces efficient, durable turbo gear units for the entire world. When it comes to tackling the most complex challenges in the industry, the company’s over 100 specialists have led their field for over 100 years. Since its founding in 2007, RENK-MAAG GmbH has manufactured more than 11,000 turbo gear units with a weight of up to 63,500 kilos based on outstanding technical intelligence and a commitment to absolute perfection. Each and every one of them is an individual masterpiece which is tailored to meet the respective customer’s wishes perfectly and without any compromises – while maintaining the very highest levels of quality at all times.

The gear factory, which was founded by Max Maag and taken over by the RENK Group in 2007, developed over the course of its history to become a manufacturer dedicated to solving the most complex technical challenges. At the over 6,000 m2 production facility, which is home to the plant’s own gear grinding center and a cutting-edge test rig, some of the products that our specialists plan and produce include high-performance turbo gear units for railway transportation purposes, the oil and gas industry, planetary gear units for power production applications and MS synchronous clutch couplings for the naval sector and power producers in various classes. The Galeocerdo, a high-speed luxury yacht, is also equipped with a gear unit from RENK-MAAG GmbH.

Inspection gear assembly
Turbo gears manufactured
Manufacturing area
An expert in the market
Product PortFolio

Highest precision and expertise result in rugged and highly efficient turbo gears.

RENK-MAAG is a leader in the engineering and manufacturing of high-quality gear units and drive systems. Our portfolio encompasses cutting-edge solutions tailored for marine, power generation, and industrial applications, featuring unparalleled efficiency and reliability. The portfolio embraces various options and technologies:

  • Helical
  • Planetary
  • Integral
  • Vacuum
  • Variable Speed

Discover how our technical expertise and innovative designs set new standards in performance and durability by visiting our website.

Service Excellence

Service and training for MAAG and RENK turbo gears.

The Swiss subsidiary also offers its customers a full range of services in the after-sales area. This means you have the best support for everything that's important after the product’s delivery: Original spare parts, repairs, overhauls, and service, as well as on-site, non-destructive testing. And our service technicians are of course always there to assist you when a gear unit requires maintenance – right on site.

Workers at a gear

Get in touch with our experts in case of any questions.

Sulzer-Allee 46 8404 Winterthur Switzerland
Phone number
+41 52 262 89 88
[email protected]



Sulzer-Allee 46
8404 Winterthur

Phone number
+41 52 262 89 88