YIJIN Hardware specializes in high-precision automotive CNC machining services, delivering custom car parts and automotive prototypes to OEMs, tier suppliers, and aftermarket manufacturers worldwide. With advanced CNC machining technology and rigorous quality standards, we produce everything from complex engine components to transmission systems and specialized automotive hardware with exceptional accuracy and reliability.
Metal: Aluminum, Aviation Aluminum, Brass, Bronze, Carbon Steel, Alloy Steel, Stainless Steel, Titanium Alloy, Nickel Alloy;
Plastic: PA66, ABS, POM, PVC, PEEK, PAI, Acrylic; Wood: Mahogany, Ebony, Pear Blossom wood, purple sandalwood.
CNC cutting, CNC turning, CNC Milling, sheet metal, CNC drilling, die casting, CNC rapid prototyping etc.
Offer service in rapid prototyping, CNC machined part, low volume production and RTV mold, CAD design…
Looking for CNC milling China? At Yijin Hardware, we specialize in CNC milling services for the automotive industry, delivering precision-manufactured parts across a wide range of materials and applications. Our expertise in custom automotive machining ensures high-quality components that meet the rigorous standards of the automotive sector.

Weight reduction is critical in modern vehicle design, whether for fuel efficiency in conventional vehicles or range extension in electric vehicles. Our advanced machining techniques help automotive manufacturers achieve substantial weight reductions:
The rapid growth of electric vehicles presents unique manufacturing challenges and opportunities. Our specialized EV component manufacturing capabilities include:
Beyond standalone components, we offer integrated manufacturing solutions that streamline the production process:

Selecting the optimal material for automotive components requires balancing performance requirements, weight considerations, durability needs, and cost factors. Our extensive experience in precision automotive component machining allows us to recommend the ideal materials for your specific application.

When exceptional strength and weight reduction are critical, lightweight titanium automotive parts provide the ultimate solution. The comparison between aluminum and titanium shows titanium's superior strength-to-weight ratio makes it ideal for high-performance racing applications and critical safety components.
For components exposed to extreme environments or requiring high wear resistance, our stainless steel machining capabilities deliver exceptional durability. Common automotive applications include turbocharger components, exhaust system parts, and fluid handling systems.
Our precision brass machining services and copper machining capabilities produce high-quality electrical connectors, bushings, and fluid system components for automotive applications.
Modern automotive design increasingly incorporates engineered plastics for weight reduction, cost efficiency, and design flexibility. Our expertise in CNC plastic machining produces high-precision components including:


Consideration | Typical Requirements | Recommended Materials |
High-temperature environments | Heat resistance up to 300°C | Titanium, Stainless Steel, PEEK |
Weight-critical components | Maximum strength-to-weight ratio | Aluminum 7075, Titanium 6Al-4V |
Corrosion resistance | Exposure to road salts and fluids | Anodized aluminum, 316 Stainless Steel |
Cost-sensitive production | Balance of performance and price | Aluminum 6061, Low Carbon Steel, ABS |
Electrical components | Conductivity requirements | Brass, Copper, Aluminum |
Wear-resistant parts | Friction and durability concerns | Hardened Steel, Stainless Steel, POM |

After receiving the customer’s drawings, we can provide a manufacturing feasibility analysis (DFM) and processing suggestions for the customer to optimize the design.
We will share the order manufacturing process with you in real-time and resolve any quality issues that may be encountered during the production process
With hundreds of advanced processing machines and equipment, it can quickly complete large-scale processing orders.
Each project has more than 3 experienced engineers to monitor the whole process of processing, prudent and meticulous, and keep improving.

Our streamlined manufacturing process ensures efficiency, quality, and timely delivery for every automotive project:


Our automotive CNC machining services produce a wide range of components across vehicle systems. Here are some common automotive parts we manufacture with typical specifications:
Component | Common Materials | Typical Tolerances | Key Specifications |
Cylinder Heads | Aluminum Alloys | ±0.025mm | Heat resistance, pressure sealing |
Pistons | Aluminum, Steel | ±0.010mm | Thermal expansion control, weight |
Connecting Rods | Steel, Titanium | ±0.015mm | Fatigue resistance, stress distribution |
Engine Mounts | Aluminum, Steel | ±0.050mm | Vibration absorption, strength |
Throttle Bodies | Aluminum | ±0.025mm | Airflow precision, sealing surfaces |
Component | Common Materials | Typical Tolerances | Key Specifications |
Gear Shafts | Hardened Steel | ±0.010mm | Wear resistance, precision meshing |
Transmission Cases | Aluminum, Magnesium | ±0.050mm | Structural integrity, weight |
Differential Components | Steel, Iron | ±0.015mm | Load bearing, precision gear mesh |
Clutch Components | Steel, Aluminum | ±0.020mm | Heat resistance, friction surfaces |
Shifter Mechanisms | Aluminum, Steel | ±0.025mm | Precision actuation, durability |
Component | Common Materials | Typical Tolerances | Key Specifications |
Control Arms | Aluminum, Steel | ±0.025mm | Strength, fatigue resistance |
Steering Knuckles | Aluminum, Iron | ±0.020mm | Load bearing, precision bearings |
Mounting Brackets | Steel, Aluminum | ±0.050mm | Structural strength, vibration control |
Sway Bar Links | Aluminum, Steel | ±0.025mm | Articulation, load transfer |
Shock Absorber Components | Aluminum, Steel | ±0.020mm | Precision fit, fluid sealing |
We understand that project timelines are crucial. Our flexible turnaround options are designed to meet various production needs:
| Project Type | Turnaround Time |
|---|---|
| Urgent High-Precision Sample | Within 24 hours |
| New Mold Requirement | Mold production in 5 days, sample delivery within 7 days |
| Standard Prototyping | Typically 5-7 days |
| High-Volume Production | Based on project complexity, often between 2-4 weeks |
Whether it’s a rapid prototype or a high-volume production run, our service is designed to accommodate your deadlines.


For most automotive applications, we routinely maintain tolerances of ±0.025mm (±0.001″). For critical components requiring exceptional precision, we can achieve tolerances as tight as ±0.005mm (±0.0002″).
We regularly machine a wide range of automotive-grade materials including aluminum alloys (6061, 7075), stainless steel (303, 304, 316), carbon steel, titanium alloys, brass, copper, and engineering plastics including POM, PEEK, and reinforced nylons.
Our quality control process includes first article inspection, in-process verification, CMM (Coordinate Measuring Machine) dimensional inspection, surface finish verification, and comprehensive final inspection according to approved quality plans.
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Yes, we offer complete solutions from initial rapid prototyping through to high-volume production. This seamless transition ensures consistency and reduces time to market.
Yes, our engineering team offers comprehensive DFM analysis to optimize your designs for cost-effective manufacturing while maintaining all functional requirements and performance specifications.
We maintain ISO 9001:2015 certification and follow IATF 16949 standards for our automotive manufacturing processes. We also provide material certifications and full traceability for all components.
Lead times vary based on complexity, quantity, and current production schedule. Typical lead times range from 1-2 weeks for prototypes to 3-4 weeks for production runs. Rush services are available for time-critical projects.
Quality is non-negotiable in automotive manufacturing. At YIJIN Hardware, we maintain rigorous quality management systems and certifications to ensure our automotive components meet or exceed industry standards.
This comprehensive approach ensures consistent quality across every automotive component we produce, from one-off prototypes to high-volume production runs.
With the rapid development of the automobile industry, efficient, high-precision, and high-stability milling of auto parts has become an effective measure to shorten the production cycle of products and improve the efficiency and competitiveness of enterprises.
CNC machining services can easily realize rapid prototyping and manufacturing of CNC auto parts. At the same time, virtual manufacturing technology, flexible manufacturing technology, and integrated manufacturing technology in CNC technology have been widely used in modern automotive processing and manufacturing.
Compared with manual manufacturing, CNC technology lays the foundation for realizing the standardization of CNC auto parts manufacturing. CNC machining services can provide a complete set of automation solutions for manufacturing custom automotive parts.
Facing the demand for high-quality and high-efficiency integrated intelligent production and manufacturing of complex parts with multiple degrees of freedom, the future custom processing services will develop in the direction of multi-degree-of-freedom composite processing, realizing the completion of turning and milling of multiple processing surfaces at one time.
The future CNC machining services will realize the machine tool Self-monitoring and management throughout the entire manufacturing process.
The CNC machining system can automatically plan the installation position, machining track and machining tool according to the 3D model of the custom auto parts.
It is more likely to use Ethernet and Internet technology to realize the communication and cooperation between the machine tools in the factory, and the planning time is the shortest process step.
The communication with the manipulator realizes automatic loading and unloading, card loading and handling, etc., and CNC machining services that realize the automation and intelligent rapid prototyping of key custom auto parts.
The needs of users have become the goal pursued by manufacturers in the automobile manufacturing industry, and flexible manufacturing units with CNC machine tools as the main body are widely used.
Free Machined Parts Design to Your Projects with Fast Turnaround Times.
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