Automotive bar turning

Automotive bar turning plays an essential role in the manufacture of high-precision mechanical parts. JACQUEMOUX DÉCOLLETAGE produces bar-turned mechanical parts in high volumes for commercial vehicles, trucks, agricultural machinery, construction machinery, buses, and sports and leisure vehicles. From medium-volume to very high-volume production, our expertise in automotive machining meets the reliability requirements of manufacturers and equipment suppliers alike.

Bar Turning of Parts for the Automotive Market

JACQUEMOUX DÉCOLLETAGE supports the automotive industry in the manufacture of specific high-precision parts, combining long-standing expertise in automotive bar turning with a high-performance machine fleet : latest-generation numerical control (CNC) machines and cam-operated multi-spindle lathes.

The company produces complex mechanical components designed for light vehicles as well as for vans and trucks, meeting the reliability requirements of manufacturers and equipment suppliers.

Automotive Machining : Precision Technical Expertise

The overall performance of a vehicle depends on the perfection of its smallest details. To meet this requirement, JACQUEMOUX DÉCOLLETAGE combines more than 60 years of experience in the sector with a latest-generation machine fleet. This technological investment turns bar turning into a high-precision industrial process, capable of producing highly complex automotive components in high volumes.

This technical mastery is reflected in the machining of parts in a wide range of materials, including steel, brass, stainless steel and aluminium. Using fixed-headstock and sliding-headstock CNC lathes, the workshop guarantees perfect repeatability and unfailing precision, an essential condition for high-volume automotive bar turning.

Ultimately, this expertise ensures industrial production strictly aligned with the requirements of the IATF 16949 standard. The combination of long-standing expertise and cutting-edge technologies makes it possible to meet the most complex specifications while complying with the industry’s highest quality standards.

Manufacturing Process and Production Capacity for Automotive Parts

The industrial responsiveness of JACQUEMOUX DÉCOLLETAGE is based on a structured organisation, backed by its ISO and IATF certifications, capable of turning a technical concept into fully controlled mass production. Each project follows an optimised manufacturing cycle :

• Technical analysis : review of the specifications and drawings supplied by automotive industry customers.
• Support and optimisation : improvement proposals to optimise cost and lead time from the project phase onwards.
• Programming : machine programming with CAD/CAM software, mainly FANUC, used in our workshop.
• Precision bar turning : high-volume machining of parts such as connectors, shafts, spacers and custom screws.
• Quality control : VICCI VISION dimensional inspection machine with vertical laser and DELTA VISION automated inspection machines, rotary table or in-line, to guarantee 0 PPM to our automotive customers.

Beyond Light Vehicles : Trucks and Agricultural Machinery

Automotive bar turning at JACQUEMOUX DÉCOLLETAGE is not limited to passenger cars. Our machine fleet and our automotive machining expertise also meet the needs of manufacturers of commercial vehicles and mobile machinery, whatever their size or use :

• Trucks and heavy goods vehicles : bar-turned mechanical parts for transmission, steering or on-board connector systems, designed to withstand high mechanical and thermal stresses.
• Agricultural machinery : shafts, bushes and hydraulic fittings for tractors, combine harvesters and harvesting equipment, built to withstand intensive outdoor environments.
• Buses and public transport vehicles : fastening and connector components meeting the same reliability requirements as passenger cars.
• Sports and leisure vehicles : custom turned parts, in small to medium volumes, for specific applications.

This versatility relies on the same mastery of materials, tight tolerances and quality control as for light vehicles, enabling JACQUEMOUX DÉCOLLETAGE to cover all requirements for bar-turned mechanical parts for the automotive industry and associated mobile machinery.

Applications in the Manufacture of Components for the Automotive Industry

Every component leaving JACQUEMOUX DÉCOLLETAGE is built to last. Automotive bar turning is not just about production ; it is about understanding how each part interacts within a complex assembly.

The bar-turned mechanical parts for the automotive industry manufactured by JACQUEMOUX DÉCOLLETAGE are integrated into several key sub-assemblies :

• Automotive connectors : parts ensuring reliable electrical connection in injection and on-board electronics systems.
• Shafts and pivots : pivoting mechanical elements in steering or suspension systems.
• Plastic supports and fasteners : components ensuring the robust assembly of the vehicle’s various parts.
• Transmission elements : parts connecting the engine and gearbox, requiring tight tolerances.

These components must meet criteria for resistance to fatigue, corrosion and thermal variation, particularly in harsh automotive environments — and even more so on trucks and agricultural machinery, which are subject to particularly demanding operating conditions.

Quality, Traceability and Compliance in Automotive Machining

Consistent quality is ensured by an integrated management system that follows the requirements of the IATF 16949 standard. Every batch of bar-turned mechanical parts for the automotive industry benefits from full traceability, allowing rigorous monitoring from receipt of raw materials through to final delivery.

Rigorous inspections are carried out at every key stage of the production flow :

• In-line dimensional inspection : continuous monitoring using integrated metrology systems to ensure process stability.
• High-precision final inspection : measurements using 3D CMM and optical systems to validate tolerances down to a hundredth of a millimetre on critical dimensions.
• Compliance validation : strict inspection protocols ensuring scrupulous compliance with customer specifications and assembly constraints.

This metrological mastery is now the essential foundation for supporting the evolution of mobility. As vehicles become lighter and electrified, components are becoming more compact and precision requirements more stringent. This technological shift reinforces the industry’s need for robust supply chains capable of delivering highly technical components flawlessly. To meet these new standards of excellence, JACQUEMOUX DÉCOLLETAGE continually adapts its processes and invests in the technologies of tomorrow.

JACQUEMOUX DÉCOLLETAGE, a Reliable Industrial Partner for the Automotive Industry

The expertise of JACQUEMOUX DÉCOLLETAGE’s teams in automotive bar turning is a major asset for manufacturers, equipment suppliers and mobile machinery manufacturers looking for a reliable bar turning subcontracting partner for the automotive sector.

The combination of CNC and cam-operated multi-spindle technologies, long-standing expertise, mastery of specific materials and rigorous quality control makes it possible to produce automotive components suited to the growing demands of the market, whether for passenger cars, trucks or agricultural machinery.

The demands of the automotive industry find here an industrial response that lives up to the challenges of safety and performance. Whether for high-performance automotive connectors, complex mechanical and plastic components, or parts for commercial vehicles, every project receives particular attention to turn technical constraints into industrial success, from small batches to very high-volume production.

The rigour acquired in the automotive sector also enables JACQUEMOUX DÉCOLLETAGE to bring its expertise to other demanding sectors such as energy, paramedical and the plastics industry.