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Subcontracting

Machining to drawing and metal fabrication

The workshops that build our special-purpose machines also work for you: machined parts and fabricated assemblies, as one-offs or small batches, made to your drawings.

Request a quote 04 74 63 04 31

Why entrust us with your parts

A machine builder's workshop, at your service

We machine and weld every day for our own machines. Your parts benefit from the same equipment, the same welders and machinists, and the same standards.

  • To your drawings

    You send us your drawings or 3D files. If a detail raises a question, our design office calls you before starting production.

  • One-offs and small batches

    From a single part to a small batch: prototypes, spare parts, tooling, welded assemblies.

  • Machining and welding together

    Cutting, welding, machining and painting under one roof: a complete assembly delivered finished, with no transport between subcontractors.

  • A local workshop

    In Saint-Romain-de-Popey, between Lyon and Tarare, in the Rhône area of France. You can come and see your parts and talk to the people who make them.

Machining to drawing

Precision mechanical parts, produced on our CNC machine tools.

Machining of a mechanical part

  • CNC turning

    Rotational parts: axles, shafts, bushes, spacers, rollers.

  • Long-bed turning

    A 4-metre conventional lathe for long parts: machine shafts, rollers and cylinders.

  • Milling on a machining centre

    Milling, drilling and tapping in one setup: plates, brackets, housings, shaped parts. Hurco 3-axis vertical machining centre, travels 762 × 508 × 610 mm. An Alcera conventional milling machine completes the workshop for rework and one-off parts.

  • Wire EDM (electrical discharge machining)

    Complex shapes and sharp corners, including in hardened steels, with no cutting force or distortion. Travels 300 × 200 × 150 mm.

Metal fabrication and welded structures

Cutting, bending and welding: frames, machine bases, housings and welded assemblies.

Welding of a metal assembly

  • Plasma cutting

    Sheet metal is cut on a CNC table, format 1,500 × 3,000 mm, up to 38 mm thick.

  • Shearing

    4-metre guillotine shear, for cutting sheet metal straight before bending or welding.

  • Bending on a CNC press brake

    Stilmax PPH 2090 CNC hydraulic press brake: 90 tonnes, 2,100 mm bending length, 3-axis back gauge. Bends are repeatable from one part to the next, from one-offs to batches.

  • TIG welding

    Clean, precise weld beads with no spatter. For stainless steel, aluminium, thin sections and parts that are visible or intended for the food industry.

  • MIG / MAG welding

    Fast and productive: the standard process for welded frames, machine bases and thick steel sections.

  • Laser welding

    1,500 W laser station: very little distortion, fine and even weld beads, less finishing work. Particularly suited to thin sheet metal.

Finishing and surface treatment

Your parts leave finished: a single order, from raw sheet to a part ready to fit.

Large industrial spray booth (illustrative photo)

  • Glass bead blasting

    Glass microbeads are blasted onto the surface in a high-pressure cabinet. This removes manufacturing and welding marks and gives stainless steel a uniform satin finish that is easy to clean.

  • Electrolytic passivation

    Pickling and passivation of weld seams on stainless steel, using a Cleanox VI electrolytic weld cleaner: heat tint is removed and the protective layer of the stainless steel is restored, so that it regains its corrosion resistance. An important point for the food and medical industries.

  • Painting

    A very large booth, to paint frames and complete assemblies in the colour requested and give them lasting corrosion protection.

Machine tools

Our production equipment

Machining programs are prepared in CAM with TopSolid’Cam, directly from your 3D files.

ProcessMachineCapacity
CNC turningCazeneuve Optimax 590CNC lathe
Long-bed turningLefebvre & Martin conventional latheParts up to 4 m long
CNC millingHurco VMX 30Ti vertical machining centre3 axes, travels 762 × 508 × 610 mm, SK40 taper, TopSolid’Cam CAM programming
Conventional millingAlcera milling machineRework, one-off parts and urgent repairs
Wire EDMFanuc Robocut Alpha 0BTravels 300 × 200 × 150 mm, automatic wire threading
Plasma cuttingEcomap 1530 CNC table, Hypertherm Powermax 125 power sourceFormat 1,500 × 3,000 mm, cutting up to 38 mm, piercing in solid plate up to 25 mm
ShearingPromecam guillotine shearStraight cutting of sheet metal up to 4 m long
BendingStilmax PPH 2090 CNC press brake90 tonnes, 2,100 mm bending length, 3 axes
WeldingTIG and MIG / MAG stations, 1,500 W manual laser welding stationSteel, stainless steel, aluminium
Glass bead blastingHBM SBC 990 high-pressure cabinetUniform satin finish on stainless steel, small and medium-sized parts
Stainless steel picklingCleanox VI electrolytic weld cleanerPickling and passivation of stainless steel welds
PaintingLarge spray boothFrames and complete assemblies
Request a quote

Three steps, no obligation

  1. You send us your drawingsby e-mail to contact@bertholon-sa.com, with the material, quantity and lead time required
  2. We assess feasibilityand we call you if any point needs clarifying
  3. You receive our quoteprice and lead time, for the quantity requested

Send my drawings Use the form

A part to machine, a frame to weld?

The simplest way: call us, or send us your drawing.

04 74 63 04 31 Request a quote