Mechanical welding

Welded and machined sets up to 6500 mm long and 12.6 t!

Thanks to large size milling and boring machines, Graux enables you to work with fine tolerances on welded sets that are several meters long and up to 12.6 tons.

Our boilermakers and welders build sets made of sheet metal, tubes and profiles of any thickness while controlling the deformation. This guarantees precision to within the sub-millimeter range per linear meter.

If needed, stress relief annealing is carried out to release a maximum of the stresses induced in the material by the welding process.

For applications that require tolerances lower than five tenths of a millimeter per linear meter, the welded sets are mounted on the benches of our milling and boring machines by experienced setter-operators to be further machined.

Unlike raw materials, the welded sets require considerable experience to balance the parts appropriately and optimize the machining positions.

The technicians then perform the surfacing, drilling and reaming to guarantee very tight tolerances in positioning, parallelism and surface condition.


Welding positioner Up to 2500 x 2500 mm; 4.5 T
16 MIG welding stations

2 CNC milling machine with 3 mobile axis and universal head indexable at 0.001° X: 6500 Y: 2500 Z: 1500

1 CNC boring machine Spindle Ø105 X:1800 Y:1250 Z:1250 W:630

Our welders at work

Discover our other areas of expertise


Sheet metal, tube and
1 to 500 mm thick profile work
More info


Turning, milling and reaming from the smallest
to the largest dimensions
More info


Mechanical, hydraulic, pneumatic and
electrical assembly in workshop
More info

Qualified welding

Quality welds, mastered
and controlled
More info

Surface treatments

Liquid painting, scouring-passivation
and browning
More info

Dimensional control

3D control with Faro type arm
More info

Technical support

Mechanical engineers at your disposal!
More info

Looking for a highly qualified manufacturer?

Graux provides expertise in the manufacturing of subsets and sets of special machines.

Contact us



Zone industrielle, 3
Belgique – Europe

VAT (BE)-(0)421.983.751
RPM Charleroi
+ 32 (0)60 51 25 85

+ 32 (0)60 51 25 90

Opening hours

Monday to Thursday: 7H30-12H00
and 12H30-16H30
Friday: 7H30-12H30