Precision CNC Machining Manufacturer in China

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Your Reliable China Partner for Billet Machined & Precision Turned Components

Dongguan Kinsai Machining Limited is a premier, engineering-driven CNC factory specializing in precision billet milled and turned components. We provide global innovators with specialized manufacturing solutions, including 3 to 5 axis milling, precision turning, and nice surface finishing. From intricate automotive parts, camera and optics, to high-end architectural hardware, we transform complex designs into exquisite metal reality.

As your reliable CNC machining partner in China, we offer more than just machining. Our engineering team provides free DFM (Design for Manufacturing) feedback to optimize your costs and performance from the first prototype to mass production. Think of us as your offshore CNC manufacturing department – dedicated to perfect quality, responsive communication, and 100% on-time delivery.

With 15+ years of specialized CNC expertise, Kinsai has grown into a well-equipped, ISO9001 compliant facility. We understand that in precision cnc machining, the smallest detail defines the final performance. This detail-first philosophy is embedded in our quality management system, ensuring every billet component meets the most demanding tolerances (±0.01mm) and aesthetic standards. At present, 80%+ of our production is dedicated to the international market, primarily serving engineering partners in North America, Europe, Oceania, etc

Our machining experience spans diverse high-requirement sectors, including Automotive & Motorsport, Cinema & Photo Gear, Optical Systems, Robotics, Decorative Hardware, etc. We are skilled in working with a wide range of materials, such as Aluminum (6061/7075), Brass (C36000/Lead-free), Stainless Steel (304/316), Titanium, and Engineering Plastics (PEEK/POM). Ready to start your next project? Just send us your STEP, IGS, or CAD files for a free DFM review and a quote within 24 hours – let’s build a partnership based on quality work and mutual trust.

Our 2100 sqm production facility is located at No.6, Xinhua Rd, Xinhe, Wanjiang District, Dongguan, Guangdong, China. We welcome global clients for on-site audits.

Your Reliable Partner for Custom CNC Machining in China

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Kinsai: Precision CNC Machining & Technical Reliability
Based in Dongguan, Kinsai transforms complex drawings into high-performance components with tight tolerances down to ±0.01mm. We don’t just machine parts; where necessary, we provide proactive DFM insights to optimize geometries for better manufacturability and cost-efficiency.
From billet aluminum and premium brass to engineering plastics, every project is verified by rigorous CMM inspection and delivered via seamless DDP logistics to the USA, UK, EU, CA, and AU.
High-precision CNC milling process for custom billet aluminum components at Kinsai Machining
15 +

Years

15+ Years of Shop-Floor Experience

10K +

Projects

10K+ Custom Projects Completed

350 +

Global Customers

Long-Term Global Partners

99.9%

Satisfaction

99.9% Reliable Quality Rate

Happy Customers

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