Custom CNC Machining & Metal Parts Manufacturing in China
Custom CNC machining and custom machined parts manufacturing are provided for customers across Europe and North America. Strict quality control, consistent manufacturing standards, and reliable lead times are maintained for every project.
Verify Certifications On Demand：ISO 9001:2015 | IATF 16949:2016
15+
Industry Experience
3000+
Service Company
50+
Global Clients
2000+
Unique Parts
Engineering-Driven Manufacturing Capabilities
ZH Precision specializes in precision CNC machining, rapid prototyping, die casting, sheet metal fabrication, and other custom metal manufacturing processes. From design support and DFM optimization to prototype validation and mass production, we provide engineering-driven manufacturing solutions for complex metal components, ensuring consistent quality, stable production performance, and tight dimensional tolerances.
CNC Machining
Custom CNC machining services including precision milling and turning for prototypes, low-volume production, and end-use metal parts.
5-Axis CNC Machining
Precision 5-axis CNC machining for complex metal parts with tight tolerances, fewer setups, and improved machining efficiency.
Die Casting
Custom aluminum, zinc, and magnesium die casting for complex metal parts with high precision and consistent quality.
Sheet Metal Fabrication
Custom sheet metal fabrication services including laser cutting, CNC bending, welding, assembly, and finishing for precision metal parts.
Aluminum Extrusion
Custom aluminum extrusion for complex profiles, structural components, and industrial parts with high accuracy and consistent quality.
Surface Treatment
Custom surface finishing for metal parts including anodizing, plating, polishing, and sandblasting for improved durability and appearance.
Engineering Support from Concept to Production
Engineering support covers every stage of the manufacturing process, from quotation and DFM review to process planning, production, and final inspection. Part geometry, material selection, machining strategies, and tolerance requirements are evaluated to improve manufacturability, reduce production risks, and ensure stable process capability.
Engineering, quality, and production teams work together throughout each project to control critical dimensions, validate manufacturing processes, and maintain consistent quality from prototype development through volume production. Standardized workflows and documented process controls ensure repeatable results across every production stage.
CAD Submission & Secure NDA (Upload CAD Files)
All 3D designs and STEP files are isolated on secure local drives under strict non-disclosure structures, ensuring total intellectual property protection for your custom projects.
Our Advanced Production Workshops
Since 2009, ZH Precision has operated dedicated workshops in Dongguan, China for CNC machining, die casting, and secondary machining, providing complete in-house manufacturing capabilities for custom metal parts. We welcome customers to visit our factory, inspect our production workshops, evaluate our manufacturing processes, and discuss projects directly with our engineering team.
Consistent Quality from Material to Delivery
A documented quality management system governs every production stage, from incoming material inspection and First Article Inspection (FAI) to in-process inspection and final validation. Standardized quality procedures ensure dimensional accuracy, process consistency, and repeatable manufacturing results.
Complete production traceability is maintained through material certificates, inspection reports, and manufacturing records. Every part is verified against engineering drawings and customer specifications before shipment.
Certified to ISO 9001:2015 and IATF 16949:2016, ZH Precision follows a structured quality management system to support precision CNC machining and custom metal parts manufacturing with consistent quality and reliable production performance.
Precision Machining Solutions for Demanding Industries
ZH Precision delivers precision CNC machining and custom metal parts manufacturing for industries with strict performance, tolerance, and reliability requirements. Our engineering-driven manufacturing approach ensures every component meets application-specific standards with consistent accuracy and long-term stability.
Aerospace
Precision machining of aluminum and titanium components for non-flight-critical aerospace systems, including cabin interiors and structural support parts, with controlled processes and documentation support for regulated supply chains.
Medical Devices
High-precision machining of stainless steel, titanium, and engineering plastics for medical devices and equipment, supporting tight tolerances, surface integrity, and validated processes aligned with regulated manufacturing environments.
Robotics
Machining of complex, fit-critical components for robotic joints, housings, and motion systems, maintaining dimensional stability, alignment, and repeatability across precision mechanical and electromechanical assemblies.
Consumer Goods
We provide precision CNC machining and custom metal parts manufacturing for consumer goods products that require reliable performance, refined appearance, and consistent quality. From product enclosures and functional components to decorative metal parts, we help brands and manufacturers achieve durable, production-ready solutions with stable quality and efficient lead times.
Industrial Equipment
Manufacturing of precision components for industrial machinery and automation equipment, focusing on dimensional consistency, durability, and reliable performance in long-term production programs.
New Energy
Precision CNC machining and custom metal parts manufacturing for new energy applications, including renewable power, energy storage, and electric systems. Focus on high-strength, heat-resistant, and corrosion-resistant components with excellent dimensional stability, long-term durability, and consistent performance in demanding operating environments.
How to Work with ZH Precision
Working with ZH Precision is simple and efficient. Send us your CAD files or drawings, and our engineering team will provide DFM feedback, quotation, and manufacturing support. After approval, we handle production, quality inspection, and global delivery of your CNC machined parts.
Submit Your Design
Send us your CAD drawings or 3D files. Our engineers will review your requirements and prepare a detailed quotation promptly.
Quote & DFM Feedback
We provide a clear quote and professional DFM report to ensure your design is optimized for precision production.
Confirm & Manufacture
Once approved, we initiate custom precision manufacturing and conduct strict quality control for every component.
Shipping & Delivery
Finished parts are inspected, securely packed, and shipped via fast global logistics with on-time delivery.
Frequently Asked Questions
Before production, manufacturability is evaluated through engineering reviews and Design for Manufacturability (DFM) feedback. Potential issues such as wall thickness, tolerances, material selection, and machining complexity are identified early to ensure stable CNC machining and reliable production results.
Depending on the material and application, a range of surface finishing options is available, including anodizing, powder coating, electroplating, brushing, and polishing. Surface finishing solutions can be customized to meet the functional requirements and appearance specifications of different industries.
Lead times depend on part complexity, material, and order quantity. Most CNC machined prototypes can be delivered within 3–7 business days, while low-volume production typically takes 7–15 business days when the production schedule is stable.
Yes. Material certificates, inspection reports, and other quality documents can be provided upon request. All materials are sourced from qualified suppliers, and every order undergoes inspection before shipment to ensure compliance with engineering specifications.
Yes. For applicable projects, we can provide materials that support RoHS and REACH compliance requirements. This is particularly important for electronic, automotive, and industrial applications that must meet environmental and regulatory requirements.
If any nonconformity is identified, it will be reviewed through engineering and quality analysis. Corrective actions may include rework, replacement, or process adjustments to ensure that the final parts meet the required specifications and engineering drawings.
Manufacturing Resources
CNC Milling vs CNC Turning: Key Differences and How to Choose
CNC milling and CNC turning remove material through opposite kinds of motion. In milling, the
CNC Machining vs Die Casting: Differences and How to Choose
CNC machining and die casting produce metal parts through fundamentally different methods, and each method
How to Calculate CNC Machining Cost and Reduce Expenses
CNC machining quotes for the same drawing often differ by 40% or more between suppliers.