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Maijin-China's Premier Provider of Custom High-Tolerance CNC Parts for Global High-Tech Industries.

FAQ
1
Why choose CNC turning services from China?

Optimal Cost-Effectiveness: Chinese CNC turning providers offer highly competitive pricing without compromising on quality. For example, Maijin Metal Works Co., Ltd., established in 2006 in Shenzhen, operates its own factory in Dongguan — one of China's most developed manufacturing hubs. By optimizing clamping fixtures and production processes, the company significantly reduces manufacturing costs while maintaining strict quality standards. This allows global customers to obtain precision-machined parts at more favorable prices compared to local suppliers in Europe or North America. The company is ISO 9001:2015 certified, ensuring that lower costs never come at the expense of quality.

Unmatched Supply Chain Speed: China possesses the world's most complete manufacturing ecosystem, granting direct access to raw materials, surface treatment services, and logistics networks. Maijin Metal can deliver high-precision CNC turned parts in as fast as 10 days using the latest CNC equipment. The company maintains a 24-hour response policy, supported by a professional sales team and experienced technical engineers. With products exported to 56 countries worldwide, this supply chain advantage translates into shorter lead times and faster turnaround for international customers.

Mature technical expertise: Over 20 years of experience and a professional technical team.

Maijin Metal has developed extensive expertise in precision machining across more than 30 metal and plastic materials, including stainless steel (SUS303, SUS304, SUS316), titanium alloys, aluminum, brass, and engineering plastics like POM and Nylon. The company holds multiple technical patents and is capable of machining difficult materials and high-precision parts that many other factories decline. Its products have been purchased and used by industry leaders such as BMW, Ford, and Bosch, serving industries ranging from aerospace and automotive to medical devices and robotics. The engineering team also provides DFM (Design for Manufacturing) guidance to help customers optimize designs, reduce costs, and maintain product functionality — demonstrating not only machining capability but genuine technical partnership.

7
What is the minimum and maximum machining size range?

At Maijin Metal, we offer flexible CNC machining capabilities to meet a wide variety of customer needs, from micro-precision components to large-scale workpieces. Our smallest feature size can reach ⌀2.0mm, allowing us to produce highly detailed and intricate parts that require exceptional accuracy. This level of precision is suitable for industries such as electronics, medical devices, and aerospace, where tiny features play a critical role in product performance.

For larger projects, the maximum workpiece size we can handle is 800×800×500mm through multi-machine coordinated machining. This capability enables us to support big structural components or assemblies without compromising quality. When dealing with oversize parts beyond standard machine limits, we use a proven segmented machining approach combined with laser tracking technology. This method achieves a stitching accuracy of **±0.02mm**, ensuring seamless integration of sections and maintaining tight overall tolerances.

Our advanced equipment, including 3- to 5-axis CNC milling centers, supports these size ranges while delivering high precision (down to ±0.01mm or better in many cases) across various materials like aluminum, stainless steel, titanium, and engineering plastics. Whether you need prototypes or production volumes, we focus on quality control and efficient processes to deliver reliable results that match your exact specifications. This combination of micro and macro capabilities makes us a versatile partner for custom manufacturing needs.

9
What types of custom parts does Maijin Metal manufacture, and what specific CNC machining services do you offer?

Maijin Metal specializes in manufacturing high-precision custom metal and plastic parts from bar or tube stock, adhering to the strictest industry quality standards. Our advanced capabilities allow us to produce complex components for demanding sectors such as aerospace, medical, and automotive.

To achieve this level of precision, we offer a comprehensive suite of CNC machining services. Our core capabilities include advanced CNC Swiss machining for extremely tight tolerances on small, complex geometries, as well as expert CNC turning and milling for versatile part production. Additionally, we provide two specialized types of centerless grinding to achieve superior surface finishes and precise dimensional accuracy on cylindrical parts.

Whether you need intricate micro-machined medical components or robust automotive fittings, Maijin Metal has the equipment and expertise to deliver. Request a quote today to discuss your project specifications.

10
Does Maijin Metal provide First Article Inspection (FAI) reports and Production Part Approval Process (PPAP) for custom CNC parts?

Yes, Maijin Metal provides comprehensive First Article Inspection (FAI) reports and fully supports the Production Part Approval Process (PPAP) for all custom CNC parts. These quality assurance documents are essential for verifying that our manufacturing process consistently meets your exact design specifications.

This level of documentation is particularly critical for industries with strict regulatory requirements, such as automotive, aerospace, and medical device manufacturing. In these sectors, demonstrating part consistency and process reliability is mandatory before moving into mass production.

When submitting your Request for Quote (RFQ), please specify your required QA documentation and compliance levels—such as PPAP Level 3 or Level 4. Our engineering team will review your requirements and seamlessly incorporate the necessary preparation and reporting costs into your initial quote. This ensures complete pricing transparency with no hidden fees, while guaranteeing your parts satisfy the highest industry quality standards.

11
Can Maijin Metal help me engineer my part?

Yes, Maijin Metal can help you engineer your part. We provide professional Design for Manufacturability (DFM) guidance to optimize your design for CNC machining. Our experienced engineers review your drawings and suggest practical improvements that reduce production costs, shorten lead times, and enhance overall part quality — all while fully preserving the original functionality and performance.

As a trusted custom CNC machining supplier, we specialize in helping clients across the automotive, aerospace, medical, and electronics industries refine complex components. Common DFM recommendations include adjusting tolerances, simplifying geometries, selecting more cost-effective materials, and optimizing for our CNC milling and turning capabilities.

This collaborative approach minimizes manufacturing risks, eliminates unnecessary expenses, and ensures your parts are easier to produce at scale. Whether you are in the prototype stage or preparing for mass production, early DFM feedback from our team delivers significant value.

Learn more about our CNC services and capabilities. Upload your design files today and let Maijin Metal’s engineering team help turn your concept into a high-quality, cost-effective reality.

We have achieved the stable sales record at the forefront of our industry in providing high quality products and services to our customers.

Contact Details

Name: Maijin sales

Tel / Whatsapp: +8613632562601

Email: mj@chinamaijin.com

Add: 10F, 9 Building Block B, Bao Neng Science and Technology Park, NO.1 Qing Xiang Rd, Long Hua District, Shen Zhen City, China.

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