Custom CNC Machining & Metal Parts Manufacturing in China
ZH Prototyping delivers custom CNC machining and precision metal parts manufacturing for customers across Europe and North America. We ensure consistent production quality, strict quality control, and reliable lead times for every project.
Quality Certifications
ISO 9001:2015 | IATF 16949:2016
Trusted by companies like
15+
Industry Experience
3000+
Service Company
98%
On-Time Delivery
2000+
Unique Parts
Engineering-Driven Manufacturing Capabilities
ZH Prototyping specializes in CNC prototyping, precision CNC machining, 5-axis CNC machining, die casting, sheet metal fabrication, and aluminum extrusion for custom metal parts. From engineering support and DFM optimization to prototype validation and production manufacturing, we provide integrated manufacturing solutions for complex metal components, helping customers achieve consistent quality, reliable performance, and tight dimensional tolerances.
CNC Machining
Custom CNC machining services including precision milling and turning for prototypes, production parts, and complex metal components.
5-Axis CNC Machining
Precision 5-axis CNC machining for complex metal parts with tight tolerances, fewer setups, and improved machining efficiency.
Die Casting
Aluminum, zinc, and magnesium die casting for complex metal parts requiring high accuracy, repeatability, and consistent quality.
Sheet Metal Fabrication
Sheet metal fabrication services including laser cutting, bending, welding, assembly, and finishing for precision metal parts.
Aluminum Extrusion
Aluminum extrusion services for complex profiles, structural components, and industrial parts with precise dimensions.
Surface Treatment
Surface finishing services including anodizing, plating, polishing, and sandblasting to improve 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 Prototyping 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 Prototyping follows a structured quality management system to support precision CNC machining and custom metal parts manufacturing with consistent quality and reliable production performance.
Precision CNC Machining Solutions for Demanding Industries
ZH Prototyping provides custom CNC prototyping and metal parts manufacturing solutions for automotive, robotics, industrial equipment, electronics, and medical industries. Our engineering-driven approach helps customers develop complex components with strict tolerances, reliable performance, and consistent quality from prototype validation to production.
Aerospace
Manufacturing lightweight aluminum and titanium components for aerospace applications, including aircraft interior parts, structural brackets, housings, and mechanical assemblies. Precision machining and controlled processes help engineers validate designs and achieve reliable performance for demanding applications.
Automotive
Precision machining of automotive components including engine parts, transmission components, brackets, housings, and structural parts. CNC prototyping helps automotive engineers validate designs, optimize performance, and develop production-ready metal components with tight tolerances and consistent quality.
Robotics
Manufacturing complex robotic components including joints, housings, brackets, end-effectors, and motion system parts. Precision machining helps robotics engineers validate designs, improve mechanical performance, and achieve accurate fit, alignment, and repeatable operation.
Medical Devices
Producing stainless steel and titanium components for medical devices, surgical instruments, equipment housings, and functional assemblies. Precision manufacturing supports complex geometries, tight tolerances, and reliable surface quality throughout product development.
Telecommunications
Manufacturing precision metal components for telecommunications equipment, including electronic housings, enclosures, heat sinks, brackets, and structural parts. CNC machining supports rapid product development with accurate dimensions, reliable performance, and consistent quality for communication systems and electronic applications.
Industrial Equipment
Producing precision components for industrial machinery, automation equipment, fixtures, and mechanical systems. Reliable manufacturing processes ensure dimensional accuracy, durability, and consistent performance in long-term applications.
How to Work with ZH Precision
Working with ZH Prototyping 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 custom 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
To provide an accurate quotation, we typically need 3D CAD files, engineering drawings, material requirements, surface finishing specifications, and expected quantities. Our engineering team reviews each project and provides DFM feedback to optimize manufacturability and cost.
Dedicated engineering communication and project support are provided throughout the manufacturing process. From design review and production planning to quality verification and delivery coordination, each project is managed through a structured workflow to ensure efficient communication and smooth execution.
Design changes are reviewed based on manufacturability, material requirements, machining processes, and production impact. Engineering feedback is provided to identify potential risks and optimize solutions before manufacturing begins.
A combination of engineering expertise, in-house manufacturing capabilities, and strict quality management supports complex metal component projects. The focus is on reducing development risks, improving manufacturability, and achieving stable production results.
Production planning, quality inspection, and shipment preparation are coordinated through a structured manufacturing workflow. This approach helps maintain predictable lead times and reliable delivery performance for global projects.
CAD files, engineering drawings, and technical documents are handled under strict confidentiality procedures. Controlled access and documented processes help protect customer intellectual property throughout the manufacturing process.
Technical support and manufacturing feedback are available after delivery, including part performance evaluation, process improvements, and future production optimization for ongoing projects.
Manufacturing Resources
CNC Prototyping in Product Development: From Design to Production
A CNC prototype proves more than one thing at once. It can confirm a mating
Die Casting Process: From Tooling to Finished Part
Placing a die casting order sets off a longer sequence than the injection cycle itself.
High Pressure Die Casting: Process & Engineering Guide
High pressure die casting forces molten metal into a steel die under pressures that can