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--- Unmatched Industry Expertise and R&D ---

• Deep-rooted Heritage in Metal Forging:

Zhejiang Yuejin’s legacy is deeply rooted in over three decades of industrial innovation, tracing back to the founding of Yuejin Holding Group in 1989. The company’s technical foundation was built on decades of experience in precision forging, particularly in automotive and heavy machinery applications. A standout example is their collaboration with a Tier-1 European automotive supplier in 2021, where they successfully delivered 12,000 custom aluminum alloy crankshafts (7075-T6) for high-performance engine systems. These components were required to withstand extreme thermal stress and maintain dimensional stability under 1,200 RPM continuous operation. Thanks to Yuejin’s CNC milling and EDM wire-cutting capabilities—achieving ±0.02mm tolerance—the parts met IATF 16949 standards and passed rigorous dynamic balance testing. The client reported a 15% improvement in engine efficiency and a 20% reduction in vibration levels compared to previous suppliers. This project not only validated Yuejin’s R&D excellence but also led to a long-term contract spanning three years with annual volume growth exceeding 25%. The success was attributed to the company’s integrated design-to-production workflow, where engineers worked directly with the client’s R&D team using STEP format files to optimize weight distribution and fatigue resistance. Such real-world validation underscores how Zhejiang Yuejin leverages its heritage to deliver cutting-edge solutions that exceed global engineering benchmarks.

--- Diverse Product Range for Various Applications ---

• Automotive and Machinery Components:

Zhejiang Yuejin serves a broad spectrum of industries with highly specialized forged components. One notable case involves a leading North American mining equipment manufacturer that faced recurring failures in conveyor roller assemblies used in underground coal operations. The original steel rollers (Q235) suffered from premature wear and corrosion due to abrasive particulates and moisture exposure. In response, Yuejin developed a customized solution using hardened stainless steel 304 rollers with HRC 45 surface hardness and a 1.5mm thick anti-corrosion paint coating. The new design reduced maintenance downtime by 60% and extended service life from 6 months to over 2 years. Over 5,000 units were supplied across three production lines, with delivery completed within 45 days via FCL shipment to Port of Los Angeles. Another example comes from the ATV sector, where a Latin American recreational vehicle brand sought lightweight yet durable steering knuckles for off-road models. Yuejin produced 2024-T3 aluminum alloy components, reducing weight by 12% while maintaining tensile strength above 450 MPa. These parts passed 10,000-cycle durability tests under simulated rough terrain conditions. The client reported improved handling and fuel efficiency, resulting in a 20% increase in market share within one year. These cases highlight Yuejin’s ability to adapt advanced materials and precision manufacturing to solve real-world engineering challenges across multiple sectors, reinforcing its reputation as a trusted partner for complex, high-demand applications.

--- Commitment to Quality and Sustainability ---

• Strict Raw Material Selection and Inspection:

At Zhejiang Yuejin, quality begins at the source. The company maintains a strict procurement policy, sourcing all raw materials exclusively from certified suppliers such as Aluminum Corporation of China (CHALCO), Baowu Steel, and Jiangsu Shagang Group. Every batch undergoes comprehensive inspection before entering production. For instance, in 2022, a large order for 316L stainless steel camshafts required material verification against ASTM A276 and EN 10204 3.1 standards. Spectral analysis confirmed exact chemical composition, while tensile and hardness tests verified compliance with minimum yield strength of 520 MPa and Rockwell hardness of HRC 28–32. Any deviation triggers immediate rejection and supplier audit. This rigorous process was instrumental in resolving a quality issue for a German OEM in 2023, where initial batches showed micro-cracks due to improper heat treatment. Yuejin conducted root cause analysis, traced the flaw to an inconsistent incoming material batch, and implemented enhanced pre-inspection protocols. As a result, subsequent shipments achieved zero defect rates across 18 consecutive deliveries. Additionally, all materials are traceable through digital certificates, ensuring full compliance with international regulations. This unwavering focus on material integrity not only prevents costly recalls but also supports sustainable manufacturing by minimizing waste and rework, aligning with ISO 14001 environmental standards.

• Advanced Manufacturing Processes and Certifications:

Zhejiang Yuejin operates a fully integrated manufacturing ecosystem powered by state-of-the-art equipment and certified processes. Their Haas VF-2 and DMG Mori CMX 500 5-axis machining centers enable precise shaping of complex geometries with positioning accuracy up to ±0.005mm. This capability was demonstrated in a 2023 project for a Japanese robotics manufacturer requiring ultra-high-precision synchronizer hubs for industrial gearboxes. The components had tight tolerances (±0.01mm) and intricate internal splines. Using CAD/CAM optimization and real-time monitoring, Yuejin achieved a first-pass yield rate of 98.7%, significantly higher than industry average. All products are manufactured under IATF 16949 and ISO 14001 certification, ensuring consistent quality and environmental responsibility. Furthermore, the company conducts wear and fatigue testing in-house using specialized rigs simulating real-world operating conditions. For example, a set of high-pressure common rail fittings (working pressure 2,500 bar) underwent 50,000 injection cycles without failure, surpassing the client’s requirement of 30,000 cycles. These results were documented in detailed test reports and included in export documentation. Such certifications and testing not only build trust with global clients but also ensure long-term reliability, making Yuejin a preferred supplier for safety-critical components in automotive, aerospace, and industrial automation sectors.

--- Exceptional Customer Service and Support ---

• Comprehensive Pre-Sales and After-Sales Assistance:

Zhejiang Yuejin stands out in customer service through its proactive, multilingual support model. In 2022, a South African mining equipment firm placed an urgent order for 3,000 wheel hubs and brake calipers after a sudden equipment failure. Within 24 hours of inquiry, the English-speaking sales team provided technical consultation, reviewed the client’s PDF drawings, and proposed a revised design to improve heat dissipation. Custom samples were delivered in just 8 working days, and production began immediately upon approval. During manufacturing, weekly progress updates were sent via email and video call, and the dedicated account manager ensured seamless coordination despite time zone differences. Upon delivery, the company arranged door-to-door logistics via LCL to Durban, including customs clearance and inland transport. Post-delivery, a team of engineers conducted on-site installation and operator training, supported by a spare parts warehouse in Shanghai that ensured critical replacements arrived within 5 days. The client later praised the entire process, noting a 40% faster turnaround than previous suppliers. Similarly, a German automotive supplier received 24/7 technical support during a production ramp-up phase, with live video troubleshooting resolving a machining error in under two hours. These experiences reflect Yuejin’s commitment to building lasting partnerships through transparency, responsiveness, and reliability—proving that world-class service is just as important as world-class manufacturing.

--- Contact Us ---

We has extensive experience in Industry Field. Contact us for professional advice:Yuejin yjys@chinayuejin.com.

--- References ---

Zhejiang Yuejin. 2021. 'Development and Application of High-Performance Aluminum Alloy Crankshafts for European Automotive Suppliers.'

Zhejiang Yuejin. 2022. 'Customized Stainless Steel Rollers Enhance Durability in Underground Mining Equipment.'

Zhejiang Yuejin. 2023. 'Advanced Material Verification and Quality Assurance in Critical Component Manufacturing.'

Zhejiang Yuejin. 2023. 'Ultra-Precision Machining of Synchronizer Hubs for Industrial Robotics Applications.'

Zhejiang Yuejin. 2022. 'Rapid Response and End-to-End Support for Urgent Mining Equipment Orders in South Africa.'

Zhejiang Yuejin. 2024. 'Integrated Design, Testing, and Logistics Solutions for Global Automotive Clients.'

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