Founded in 1877, Grimonprez Transmission Gears is a renowned specialist in the design and manufacturing of high-performance gears and gearboxes. With over a century of expertise, it delivers precision-engineered transmission solutions tailored to the most demanding applications.
Grimonprez Transmission Gears manufactures all types of gears, from spur/helical gears to straight bevel gears as well as transmission elements in small and medium series.
In 2012, the company became affiliated with three other companies to create Sub-Alliance, a family-owned cluster specializing in advanced manufacturing and high-precision technologies. This strategic alliance creates a unique synergy across key areas, combining expertise in the development and production of polymers, composites, metals, and transmissions.

Scope of activities
- Cutting, hobbing, broaching, grinding
- Internal/external splines
- Straight and helical gears
- CNC milling & turning
- Heat and surface treatment
Certifications
- ISO 9001
- AS 9100
Highlights
- Research department
- High-precision processes : manufacture of gears from 50 to 500mm, inter/exter, straight or helical
- State-of-the-art CNC machines
- Small and medium series
- Rank 1 Airbus Helicopters
7 Rue Theodor Klüber
7711 Dottignies
Belgium