With a great expertise in the production of components and sub-assemblies since 1963, GRIMONPREZ PRODUCTION GEARS - GPG is specialized in :

  • Manufacture of gears from 50 to 500mm, inter/exter, straight or helical
  • In-house transformation (Turning; Milling; Cutting with mother mill and knife tool; Deburring & marking; Inter/exter grinding; Tooth grinding).

GPG is the right partner for all gear manufacturing requests and offers its customers a support service for industrialization and co-development.

Gear shaft grinded


High precision finishing

We deliver high precision technical parts.

Our most advanced machine park finishes your parts according to your strictest requirements:
  • Tooth grinding
  • Cylindrical grinding

Come and discover our latest innovations in the manufacture of your gears and transmission elements; thanks to state-of-the-art machines and experienced and competent team.

Discover our expertise


Latest generation automate

We pay particular attention to supporting constant investments in the latest generation of CNC machines.

GPG has a fleet of CNC cutting machines 100% automated, we ensure responsiveness and competitiveness with controls adapted to the most advanced applications.
Pièces matiere brut de forge


Meet your needs  

We ensure you a great flexibility of production allowing to realize your parts in small and medium series (max 1000 parts / week).

We master outsourced operations:
  • Material purchase
  • Subcontracting
  • Heat treatment


High quality service

Quality organization certified EN9100/9001, Grimonprez Production Gears is the supplier of the largest contractors in the aeronautical sector.

GPG ensures quality at each stage of production thanks to a strict quality policy associated with efficient control equipment.

Our types of control :
  • Control of grinding burns by Nital etching Surface states Ra, Rt, Rz
  • Hardness HB, Hrc, HR, HV
  • Contractor
  • Gear control
  • Measuring column
  • 3D control


Know more about quality




secteurs activités


Dedicated to leading-edge industrial sectors

For more than 50 years, we have put our know-how at the service of various sectors of activity: 
  • Aeronautics
  • Civil engineering 
  • Transport
  • Marine
  • Energy
  • Industry 
  • Agriculture 
  • Defense


International shipping

50% of our turnover is realized in export:
Europe, United States, Japan, Brazil, Australia, China, Canada, India, England

Carte du monde expedition à l'international
Logo camion de livraison à l'heure


On-time delivery 

We are committed to providing a timely delivery service. Conscious of being a link in the chain on which our customers rely, we do everything possible to deliver with impeccable quality to our customers on time and in quantity.

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