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Flanges, casings and complex mechanical assemblies for the aerospace industry

Defontaine is supplying the main engine and nacelle manufacturers in the aerospace industry.

Production of flanges, casings and complex mechanical assemblies for prestigious programmes

Defontaine is a renowned expert in the production of specific parts for civil and military aircraft engines.

Each product manufactured meets the requirements of the major aerospace engine and nacelle manufacturers.

Our parts come in small, medium and large series. We develop various special processes to offer a complete service. Production is based on lean manufacturing for the most prestigious engine programmes.

Our organisation provides for your needs for cycle reduction, mainly in the Fast Make development phase or in the event of an emergency (AOG). We are certified by Nadcap and by major engine manufacturers:

  • EN 9100, AQAP 2120 certification
  • Dimensional capabilities: housings from 150 mm to 2,000 mm, flanges from 150 mm to 6,500 mm in diameter.

Full control of the production cycle

One of Defontaine’s greatest strengths: controlling every element of the production chain with the ability to offer an exhaustive supply.

Supply of raw materials: we have the capacity to use a wide variety of materials. We work on cobalt, titanium, aluminium, stainless steel-based products, etc. and we have the skills required to process special alloys.

The application of specific processes (both forging and machining) and our zero defect principle guarantees 100% On Time Delivery.

employé defontaine travaillant sur une pièce à l'alliage pointu

Our flanges, casings and complex mechanical assemblies

brides carters et ensemble mécanos soudés pour aeronautique defontaine

Defontaine produces flanges, casings and mechanically welded assemblies for civil and military aircraft. A few examples of applications:

For aircraft engines and nacelles:

  • Wide-body: GE9X, GEnX, GE90, GP7200, CF6-80, XWB84EP, A330Neo
  • Narrow-body: LEAP1A, LEAP1B, PW1100G, CFM56, A320Neo
  • Regional: SAM146, PW1500G
  • Business: PW812, Pearl700

For military engines:

  • M53, M88, TP400, LARZAC, RB199, Adour

Do you need to know more about our aerospace applications?

DOWNLOAD FILE: General brochure - EN

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Processes used by Defontaine

We use a large variety of processes to manufacture our flanges, casings and complex mechanical assemblies: forging, welding, shaping, machining, turning or milling. 

Defontaine’s flash-butt welding, rolling and forging processes allow to obtain a cross-section close to the profile of the final part in order to save on the volume of material used.

It is also possible to use non-conventional processes such as Electrical Discharge Machining (EDM) or laser cutting.

If necessary and depending on the requirements of our customers, we also use special processes for the aerospace industry which are based on NADCAP certifications or certifications by engine manufacturers.

procédé defontaine pour secteur aéronautique

Defontaine, expert in flanges, casings and complex mechanical assemblies for the aerospace industry

Defontaine is a French designer  and manufacturer of flanges, casings and complex mechanical assemblies.

We offer innovative solutions and design parts specifically made for your application. Defontaine, the most valued partner of aircraft and helicopter manufacturers, provides you with expert advice and guidance. We offer professional expertise for your flanges, casings and complex mechanical assemblies for the aerospace industry. We are at your side to optimise your performance.

Our certifications for the aerospace sector

Associated services

& design



& Services


We have set up specific services to guarantee the quality of our products and the satisfaction of our customers throughout our exchanges.

Deadline constraints, technical challenges, secure deliveries, guaranteed lifespan of parts… the services of the Defontaine Group facilitate our collaboration.

Do you need special guidance?