1
JOAL Mécanique générale
Clermont-Ferrand (63)
General engineering workshop specialising in turning, milling, cylindrical and surface grinding, and EDM, producing made-to-drawing parts from one-offs to medium batches.
Machining process
Industrial Turning: Find a Machining Subcontractor
Turning is a machining process that removes material from a workpiece mounted in a chuck, which rotates around an axis while a cutting tool moves to shape it. It produces rotationally symmetric parts: shafts, pins, bushings, plugs, pulleys, screws, or threaded components. CNC turning, driven by digital programs, applies equally to one-off prototype parts and production runs of several thousand units, in both metal and engineering plastics.
Where to find a turning workshop
Cities are ranked by number of listed workshops. Each page details the companies and their specialities.
Cluses
74
17 workshops
Angers
49
11 workshops
Clermont-Ferrand
63
10 workshops
La Roche-sur-Yon
85
10 workshops
Lyon
69
10 workshops
Oyonnax
01
10 workshops
Saint-Étienne
42
10 workshops
Annecy
74
9 workshops
Besançon
25
9 workshops
Bordeaux
33
9 workshops
Mulhouse
68
9 workshops
Nantes
44
9 workshops
Belfort
90
8 workshops
Lille
59
8 workshops
Marseille
13
8 workshops
Nice
06
8 workshops
Thiers
63
8 workshops
Cholet
49
7 workshops
Colmar
68
7 workshops
Le Creusot
71
7 workshops
Montbéliard
25
7 workshops
Saint-Nazaire
44
7 workshops
Bourg-en-Bresse
01
6 workshops
Segré-en-Anjou Bleu
49
6 workshops
Strasbourg
67
6 workshops
Challans
85
5 workshops
Issoire
63
5 workshops
Montpellier
34
5 workshops
Riom
63
5 workshops
Roanne
42
5 workshops
Toulouse
31
5 workshops
Chalon-sur-Saône
71
4 workshops
Dole
39
4 workshops
Les Sables-d'Olonne
85
4 workshops
Montaigu-Vendée
85
4 workshops
Saumur
49
4 workshops
Sèvremoine
49
4 workshops
Annemasse
74
3 workshops
Pontarlier
25
3 workshops
Thonon-les-Bains
74
3 workshops
Choosing the right supplier
When to choose turning over another process
Turning is the process of choice whenever a part has rotational symmetry: outer and inner diameters, shoulders, grooves, chamfers, threads. It is particularly suited to shafts, pins, spacers, bushings, fittings, or threaded parts. When the geometry combines flat faces, off-center holes, or pockets, this is referred to as mill-turning: the same machine performs multiple operations without repositioning, which limits concentricity errors. For purely prismatic parts with no axis of revolution, milling remains preferable. The choice between manual (conventional) turning and CNC turning mainly depends on the quantity and repeatability required.
The criteria that truly set two machine shops apart
Beyond the machine fleet itself, several factors allow for an objective comparison of subcontractors. The machinable diameter and length capacity determines whether the shop can produce your part in a single setup. The presence of a sub-spindle or live tooling allows for complete machining without manual repositioning, reducing positional errors. Tolerances commonly achievable in turning fall between IT7 and IT9 depending on part rigidity and diameter; inspection using a coordinate measuring machine or surface roughness tester is necessary to validate tight tolerances. Machined materials vary: steel, stainless steel, aluminum, brass, titanium, as well as engineering plastics such as POM or PEEK, each with its own cutting parameters. Finally, batch size influences the production method: bar turning for small to medium runs, Swiss machining (screw machining) for large repetitive production runs.
What to prepare to get an accurate quote
A dimensioned drawing with functional tolerances, required surface finishes, and critical dimensions allows the shop to accurately estimate machining time. Specify the desired material, whether supplied as bar stock or raw blank, as well as the total quantity and delivery schedule if the run is split across several batches. Indicate any required heat or surface treatments (hardening, anodizing, nickel plating) as these affect the sequence of operations and sometimes require machining allowances. Also mention the desired lead time and whether a dimensional inspection report is required, as this determines the metrology resources the subcontractor will need to allocate.
Materials most often worked with this process
turning workshops
A selection of listed workshops, all cities combined. The first 30 of 279 listed; the full list is on the city pages.
2
Mendes Mécanique générale
Clermont-Ferrand (63)
Manufacture of custom mechanical parts, from drawing to assembly. Turning and milling of aluminium, steel, stainless steel, titanium, bronze and brass, for the aerospace…
3
Montferrand Mécanique
Clermont-Ferrand (63)
Clermont-based facility active for over 35 years, specialised in CNC and conventional precision mechanics. Offers a wide range of processes including wire and sinker EDM…
4
MGR — Mécanique Générale
Gerzat (63)
Workshop located in Gerzat offering machining, milling, turning and drilling services on high-precision parts. Serves a diverse industrial customer base including aerosp…
5
UMC — Usinage Mécanique du Centre
Riom (63)
Riom-based company specialised in general mechanics, boilermaking and metalwork, working as an industrial subcontractor for the design of steel, stainless steel and alum…
6
Pasmeca
Cournon-d'Auvergne (63)
Multi-material precision machining: stainless steel, aluminium, copper, brass, cast iron and plastics. Turning and milling for aerospace, electronics, rail, medical and …
7
BMP — Berland Mécanique de Précision
Clermont-Ferrand (63)
Support from design to delivery: milling, turning, drilling, tapping and grinding of medium-sized parts, with drawing optimisation by an in-house design office.
8
KPM
Beaumont (63)
Precision machining on stainless steel, aluminium, plastic, copper, brass and cast iron. Turning, milling, threading and prototyping for aerospace, electronics, rail, me…
9
3D Usinage
Fontaine (90)
Small business founded in 2010 and based at the Aéroparc de Fontaine in the Territoire de Belfort, focused on industrial mechanics. Its location on an aeronautics park r…
10
AAS Industries
Saumur (Chacé) (49)
11
ACM2B
Les Sables-d'Olonne (85)
12
ACMA
Bordeaux (33)
13
ACME Précision
Le Creusot (71)
14
ACSM Lioret Métal Industries
Le Creusot (71)
15
Alpha Industries
Arbent (01)
16
AMB
Montbéliard (25)
Machining company on CNC machining centers located on Avenue Gambetta in Montbéliard. It specializes in the design, manufacture and marketing of high-technicality parts.
17
AMD
Belfort (90)
Workshop in the Territoire de Belfort offering design and manufacture of press tooling and plastic injection molds. Masters 2D/3D milling, turning, grinding and EDM proc…
18
AMECA (Atelier Mécanique de la Côte d'Azur)
Nice (06)
19
Amery
Besançon (25)
Company based in Besançon active for over 50 years in precision mechanics. Manufactures machined parts on a fleet of CNC machines for customers in the automotive and aer…
20
AMPM
La Mothe-Achard (85)
21
AMS - Anjou Machines Spéciales
Angers (49)
22
Anger Sté d'Exploitation
Strasbourg (67)
Strasbourg-based company positioned in general and precision mechanics. Carries out contract machining operations on metal parts on behalf of local manufacturers.
23
Anjou Maquette Prototypes (AMP)
Angers (49)
24
Anjou Moules Outillages (AMO)
Angers (49)
25
Anjou Réalisations Mécaniques
Sèvremoine (49)
26
Annecy Technologie Service
Annecy (74)
Annecy-based precision machining company certified ISO 9001, focused on the manufacture of custom aluminium parts. It relies on digital equipment and a continuous improv…
27
Applications Tour et Mécanique
Saint-Étienne (42)
28
ARAM
Rezé (44)
29
Arcom Industrie
Annemasse (74)
30
Ardex
Cluses (74)
Precision mechanics company in Cluses, specialised in CNC turning and milling for the production of small, complex parts. Works for customers in various industrial secto…
Frequently asked questions
What precision can be achieved in turning?
Common tolerances fall between IT7 and IT9 depending on part diameter and rigidity. Tighter tolerances are achievable but require systematic inspection and may extend machining time.
What is the difference between conventional turning and CNC turning?
Conventional turning relies on manual control of the machine, suited to one-off parts or repairs. CNC turning uses a digital program that ensures repeatability and precision for medium to large production runs.
What materials can be turned?
Most metals (steel, stainless steel, aluminum, brass, titanium) and many engineering plastics (POM, PEEK, PA) can be turned, provided the cutting parameters and tooling are adapted to each material.
What lead time should be expected for a turned part?
Lead time depends on part complexity, quantity, and material availability. A simple part in a small batch can be delivered quickly, while a complex geometry or large production run requires more preparation.