Custom Parts. Precision Made. Reliably Delivered.
Get quality custom parts with competitive pricing and responsive technical support. Serving customers worldwide, Zhonghui Precision supports your project from drawing review and prototyping through production, with clear communication and coordinated manufacturing.
Verify Certifications On Demand：ISO 9001:2015 | IATF 16949:2016
Custom Parts Manufacturing Capabilities
Zhonghui Precision provides one-stop custom parts manufacturing through CNC machining, die casting, sheet metal fabrication, and aluminum extrusion. From a single prototype to 10,000+ production parts, we coordinate materials, manufacturing processes, secondary machining, and surface finishing to meet your design, tolerance, and quantity requirements.
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, Zhonghui 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
Our ISO 9001:2015 and IATF 16949:2016 certified quality systems guide quality control from material inspection and First Article Inspection (FAI) through in-process checks and final inspection. Dimensions and surface requirements are verified against approved drawings.
Material certificates, inspection reports, and production records support traceability. Final checks confirm conformity before shipment, with documentation available to meet project requirements.
Material Verification
Incoming materials are checked against specified grades, with material certificates reviewed to confirm project requirements.
Dimensional Inspection
CMM and precision measuring equipment verify critical dimensions, feature locations, and tolerances against approved drawings.
In-Process Control
First-piece and scheduled production checks monitor key features, with deviations reviewed and addressed during manufacturing.
Quality Documentation
Material certificates, dimensional reports, and production records provide documented evidence for traceability and customer review.
Custom Parts Manufacturing for Diverse Industries
Custom parts for automotive, aerospace, automation, medical devices, robotics, and communications equipment are manufactured to application-specific requirements. Material selection, production methods, and inspection planning address operating conditions, dimensional accuracy, surface finishes, and assembly fit.
Automation
Custom parts manufacturing for automated equipment, including fixture plates, mounting brackets, actuator housings, and positioning components, with attention to alignment, assembly fit, and repeatable operation.
Aerospace
Precision machining of aluminum and titanium parts for non-flight-critical aerospace applications, including cabin hardware and equipment supports, with dimensional inspection and documentation tailored to project requirements.
Automotive
Prototype and production parts for automotive development, including housings, brackets, covers, and mounting components, with material selection and dimensional control based on operating conditions and assembly requirements.
Robotics
Custom housings, joint components, mounting plates, and end-effector parts for robotic systems, balancing weight, stiffness, and precision to support motion, equipment integration, and assembly.
Medical Devices
Custom parts for medical equipment, including instrument housings, mounting brackets, and device frames, with attention to material specifications, surface finishes, dimensional accuracy, and inspection records.
Communications
Custom enclosures, heat sinks, mounting hardware, and shielding components for communications equipment, addressing thermal management, environmental exposure, and integration with electronic assemblies.
How to Work with Zhonghui Precision
Working with Zhonghui 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
Zinc Die Casting Components: Design, Materials, and Manufacturing Guide
Zinc die casting components combine detailed geometry with functional features such as mounting points, threads,
What Is Zinc Alloy? Composition, Properties, and Uses
Zinc alloy is a metal made primarily from zinc combined with elements such as aluminum,
Zinc Die Casting Manufacturers in China: 7 Companies to Compare
China has many zinc die casting manufacturers, but choosing the right partner requires more than