Custom CNC Machining Services
ZH Precision provides custom CNC machining services for precision metal parts, transforming 2D drawings and 3D CAD models into reliable machined components. We support diverse manufacturing applications with strict quality control and consistent production performance.
- Factory-Direct Pricing & Free DFM Review
- Dedicated Engineering Support
- Fast Turnaround & Flexible Production
Quality Certifications
ISO 9001:2015 | IATF 16949:2016
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CNC Machining with ZH Precision
As an ISO 9001:2015 and IATF 16949:2016 certified machine shop, ZH Precision provides precision CNC machining services including CNC milling, CNC turning, 5-axis CNC machining, and mill-turn machining capabilities. With over 30 advanced machines, we manufacture complex metal components with accurate dimensions, consistent quality, and controlled production processes.
From CNC prototyping to production, ZH Precision supports OEM and engineering projects with reliable machining solutions. Strict process control, in-process inspection, and final verification ensure dimensional accuracy, stable quality, and on-time delivery for custom CNC machined parts.
Our Custom CNC Machining Capabilities.
ZH Precision offers a full range of CNC machining capabilities, including CNC milling, CNC turning, and 5-axis machining. From CNC prototyping to on-demand manufacturing, we provide precision metal parts for projects at different production stages.
CNC Milling Services
CNC milling uses rotating cutting tools to remove material from a stationary workpiece, creating precision features such as pockets, slots, holes, contours, and complex 3D surfaces. It is widely used for brackets, housings, plates, fixtures, and other custom metal components with various geometric requirements.
3-axis, 4-axis, and 5-axis milling capabilities support different part designs and complexity levels. Multi-axis machining enables more efficient processing of complex features while maintaining accurate dimensions and consistent surface quality.
CNC Turning Services
CNC turning rotates the workpiece while cutting tools remove material to create cylindrical and rotational components. It is commonly used for shafts, bushings, sleeves, pins, connectors, and threaded parts where diameter accuracy, concentricity, and surface finish are critical.
Advanced CNC turning processes provide efficient machining for rotational components with stable dimensional control, reliable repeatability, and consistent production quality.
5-Axis CNC Machining
5-axis CNC machining allows cutting tools to move along multiple axes simultaneously, enabling the production of complex parts with angled surfaces, deep cavities, undercuts, and challenging geometries. This capability expands machining possibilities beyond traditional 3-axis processes.
By improving tool accessibility and reducing multiple setups, 5-axis machining helps maintain tighter feature relationships, minimize tolerance accumulation, and achieve higher accuracy for complex precision components.
CNC Mill-Turn Machining
CNC mill-turn machining combines turning and milling operations in a single setup, allowing components with rotational features, milled surfaces, holes, and complex profiles to be completed within one machining process. This approach reduces part handling and improves overall machining efficiency.
Mill-turn machining is well suited for complex metal parts requiring multiple operations and precise feature alignment. Completing more processes in one setup helps simplify production workflows while maintaining consistent dimensional accuracy.
How To Get a Quote for CNC Machined Parts
Simply upload your CAD files to receive a free DFM assessment and formal quotation within 12 working hours. We deliver transparent quotes tailored to balance cost, quality and lead time for your custom CNC machined components.
CNC Machining Tolerances
ZH Precision follows ISO 2768-m standards and provides accurate tolerance capabilities based on real production conditions. We do not promise tolerances that cannot be consistently achieved. For feature tolerances tighter than ±0.001 mm, please send your drawings for engineering review and feasibility assessment.
| Specification | Details |
|---|---|
| General Tolerances | ISO 2768-M |
| Precision Tolerances | According to drawing specifications and GD&T requirements |
| Minimum Wall Thickness | 0.5 mm |
| Minimum End Mill Size | 0.5 mm |
| Minimum Drill Size | 1 mm |
| Maximum Part Dimensions | CNC Milling: 4000 × 1500 × 600 mm CNC Turning: Ø200 × 500 mm |
| Minimum Part Size | CNC Milling: 5 × 5 × 5 mm CNC Turning: Ø2 × 2 mm |
| Production Volume | Prototype Runs: 1-100 pcs Low Volume Production: 100-10,000 pcs Production Runs: 10,000+ pcs |
| Standard Lead Time | Typical lead times start from 3-5 business days depending on project requirements |
CNC Machining Materials We Work With
ZH Precision works with a wide range of metals for CNC machining, including aluminum, stainless steel, brass, copper, titanium, and more. Below are the commonly used materials and their typical part applications. Material certificates and full traceability are available for quality assurance.
🔍 Unsure about material selection? Our engineers provide free DFM feedback to help select the right material based on your part requirements and application needs.
Surface Finishes for CNC Machined Parts
We offer various surface finishing options for CNC machined parts, including anodizing, polishing, plating, powder coating, and passivation. Inspection reports, including Coating Appearance Inspection Report, are available to verify surface quality and finish consistency.
After processing
Parts are delivered with the original CNC machining marks, providing a cost-effective finish with tight dimensional control and fast turnaround.
Anodizing
Anodizing creates a durable oxide layer on aluminum parts, improving corrosion resistance, wear resistance, and surface appearance.
Polishing
Polishing removes surface imperfections and creates a smooth, reflective finish for parts requiring enhanced appearance and surface quality.
Sand Blasting
Sand blasting provides a uniform matte texture by removing machining marks and preparing surfaces for further finishing.
Tumbling
Tumbling smooths sharp edges and improves surface consistency, making it suitable for deburring and finishing small CNC parts.
Electropolish
Electropolishing removes microscopic surface material to improve smoothness, cleanliness, and corrosion resistance, commonly used for stainless steel parts.
Alodine
Alodine coating provides corrosion protection for aluminum parts while maintaining electrical conductivity and improving paint adhesion.
Electroplating
Electroplating applies a protective metal coating to enhance corrosion resistance, wear resistance, and surface performance.
Design Guidelines for CNC Machining
Following CNC machining design guidelines helps improve part quality, reduce manufacturing costs, and ensure efficient production. Our engineers provide DFM feedback to optimize your designs before manufacturing.
Threads & Tapped Holes
Use standard thread sizes and provide sufficient tapping depth to ensure reliable machining and consistent thread quality.
Hole Design
Avoid extremely small or deep holes whenever possible to improve tool performance and maintain machining efficiency.
Internal Corner Radii
Add suitable corner radii based on tool size to reduce machining difficulty and achieve better surface finishes.
Wall Thickness
Maintain adequate wall thickness to prevent vibration, deformation, and dimensional issues during machining.
Undercut Design
Use standard undercut features whenever possible to simplify tooling requirements and reduce manufacturing complexity.
Machining Tolerances
Apply tight tolerances only where required. Standard CNC machining tolerances follow ISO 2768-m.
Part Marking
Laser engraving and marking options are available for part identification, labeling, and traceability requirements.
Design Complexity
Simplify unnecessary features to improve manufacturability, shorten machining time, and control production costs.
Custom CNC Machined Parts We Manufacture
Below are some typical CNC machined parts we manufacture, including housings, brackets, shafts, heat sinks, and other precision metal components produced according to customer designs.
Precision CNC Machining Quality Standards
We follow a structured quality inspection process, including IQC, IPQC, QE, and OQC, to ensure consistent quality throughout production. Parts are inspected according to customer drawings, GD&T requirements, and specified tolerances.
Our quality team uses CMMs, height gauges, optical comparators, plug gauges, pin gauges, and other precision instruments to verify critical dimensions and surface requirements. Visual inspections are also performed to check scratches, burrs, and appearance defects. Inspection reports, Material Certificates, and FAI reports are available to support quality verification.
Why Engineers Choose ZH Precision
As a direct manufacturer with our own production facility, our pricing is based on actual machining requirements without additional intermediary fees or unnecessary markups. By working directly with our factory, customers benefit from transparent pricing and competitive solutions for custom CNC Machining and production orders.
High Quality Parts
We ensure consistent quality through strict inspection processes, accurate machining, and reliable manufacturing standards for every custom metal part.
Competitive Pricing
Efficient production methods and process optimization help reduce manufacturing costs while maintaining stable quality and performance.
Fast Delivery
Streamlined production workflows and experienced teams help shorten lead times and ensure reliable delivery for custom metal parts worldwide.
What Is CNC Machining Services?
Custom CNC machining services are precision subtractive manufacturing solutions that transform engineering designs into functional metal components. Based on 3D CAD models, 2D drawings, material specifications, and tolerance requirements, CNC machines remove material from metal stock to create parts with complex geometries and tight dimensional requirements.
The manufacturing process includes design review, CNC programming, material preparation, precision machining, dimensional inspection, and surface finishing. ZH Precision produces custom CNC machined parts for prototypes, functional testing, and production manufacturing, helping engineers develop and scale reliable metal components for various applications.
Frequently Asked Questions
Yes. We manufacture custom CNC parts based on customer-provided CAD files, 2D drawings, and technical specifications. Our engineers review each project to ensure the design is suitable for machining before production.
Yes. We support CNC prototyping, low-volume production, and repeat manufacturing orders. Our flexible production capabilities help engineers validate designs and transition from prototypes to production.
Lead time depends on part complexity, quantity, material, and finishing requirements. Typically, CNC prototypes can be completed within 3–5 business days, low-volume production orders require around 10–15 business days, and larger production runs are typically completed within 20–25 business days. Our team works closely with customers to ensure efficient scheduling and reliable delivery.
Yes. Our engineers provide DFM feedback to improve machinability, reduce unnecessary costs, and optimize part designs before manufacturing.
We respect customer confidentiality and handle all drawings, CAD files, and technical documents securely. Customer data is used only for quotation and manufacturing purposes.