Custom CNC Machining Services
Custom CNC machining services for parts made to your 2D drawings and 3D CAD files, with in-house CNC milling, turning, and 5-axis machining from prototypes through production.
- 0.01 mm Precision
- 30+ CNC Machines
- Quote Within 12 Working Hours
Verify Certifications On Demand：
ISO 9001:2015 | IATF 16949:2016
STP | STEP | SLDPRT | IPT | PRT | SAT
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CNC Machining Manufacturer in China
ZH Precision is a CNC machining manufacturer in China with 30+ 3-axis, 4-axis, 5-axis, and horizontal machining centers. We provide custom CNC machining services from prototypes to production, supported by ISO 9001:2015 and IATF 16949:2016 quality systems, in-house inspection, tight-tolerance capability, and reliable global delivery.
Our Custom CNC Machining Capabilities
Our in-house CNC capabilities include 3-axis, 4-axis, and 5-axis milling, CNC turning, and horizontal machining for custom parts with complex geometries and critical features. We support a wide range of part sizes, materials, and production volumes, from one-off prototypes to repeat production.
Custom CNC Milling Services
3-axis, 4-axis, and 5-axis milling supports parts with pockets, contours, multiple machined faces, and complex features while reducing setups and maintaining feature accuracy.
Custom CNC Turning Services
CNC turning supports shafts, sleeves, bushings, flanges, threaded parts, and other rotational components, including drilling, boring, grooving, and secondary milling.
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.
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.
CNC Machining Tolerances
We follow ISO 2768-m standards and provide tolerance capabilities based on actual 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 | Prototyping: 1-100 pcs Low Volume Production: 101-10,000 pcs High Volume Production: 10,001+ pcs |
| Standard Lead Time | Typically 3-5 business days for most projects |
CNC Machined Parts From Prototype to Production
Custom CNC machining supports projects from early-stage prototypes to repeat production. Flexible machining capacity, controlled processes, and consistent inspection help maintain part quality as projects move from design validation into production.
CNC Prototyping
Validate your design before production with functional CNC prototypes made for fit, assembly, geometry, and performance testing. Fast machining helps you identify design issues early and move through development with greater confidence.
Learn MoreLow-Volume CNC Production
Move from approved prototypes to repeatable production with controlled machining processes and in-process inspection. We support low-volume and ongoing orders while maintaining consistent dimensions, finish, and part quality across batches.
Learn MoreCNC Machining Materials We Work With
A wide range of metals is available 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.
As-Machined
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.
Bead 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.
Precision CNC Machining Quality Standards
Quality control begins with the customer drawing and specified requirements. Before and during production, we use incoming material inspection, first article inspection, in-process inspection, and final inspection to verify critical dimensions, tolerances, GD&T requirements, and other specified characteristics.
Our quality team uses CMMs, height gauges, optical comparators, plug gauges, pin gauges, and other precision measuring instruments based on the feature and inspection requirement. Visual inspection is also performed to identify burrs, scratches, surface defects, and other appearance issues.
Inspection reports, material certificates, and FAI reports can be provided when required to document part conformity and support customer quality verification.
Why Engineers Worldwide Choose ZH Precision
Reliable manufacturing requires more than machine capacity. Practical engineering support, controlled production, and consistent inspection help keep quality stable, costs predictable, and delivery on schedule across prototype and production orders.
CNC Capacity
30+ CNC machines support 3-axis, 4-axis, 5-axis, turning, and horizontal machining for a wide range of part geometries and production requirements.
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.
From CAD File to Finished CNC Parts
A simple four-step process takes your CNC parts from file review and quotation through machining, quality control, finishing, and delivery.
Upload Files
Submit CAD files with material, quantity, tolerance, and finishing requirements for review.
Review & Quote
Review drawings and manufacturability, then confirm requirements, pricing, and the production plan.
CNC Machining & QC
Machine and inspect parts to the dimensions, tolerances, and quality requirements on your drawings.
Finishing & Delivery
Complete finishing and final inspection, then package and ship approved parts securely.
What Is CNC Machining?
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.