Custom CNC Machining Services
ZH Precision provides custom CNC machining services for parts produced according to customer drawings and technical requirements. Using CNC milling, CNC turning, and multi-axis machining, we manufacture components in specified materials to support diverse engineering and manufacturing applications.
- Competitive Prices & DFM
- 24/7 Engineering Support
- Quick Turn, Short Lead Time, not MOQ
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Chinese CNC Machined Parts Manufacturer，Factory Direct Prices
ZH Precision is a CNC machining manufacturer in China serving global customers across Europe and North America, equipped with 30+ 3/4/5-axis and horizontal machining centers. We specialize in custom metal parts and high-precision components for industrial applications, delivering stable quality, tight tolerances, and fast lead times worldwide.
Engineering-Driven CNC Machining Capabilities
Backed by expert engineering and advanced machining equipment, ZH Precision delivers tightly-toleranced precision parts for complex industrial applications. We prioritize design-for-manufacturability, process stability, and reliable lead times, with most orders delivered to North America and Europe within 5–10 business days.
Custom CNC Machining Services
Versatile CNC milling delivers tailored metal parts in various sizes and forms, with efficient multi-surface processing to meet your exact project specifications.
Custom CNC Turning Services
Precision CNC turning produces consistently accurate metal components, supporting small to medium batches for both prototyping and full production runs.
CNC Machining Solutions for Prototypes and Production
ZH Precision applies its CNC machining expertise to meet a wide range of project requirements. Our team maintains adaptable processes, strict quality standards, and efficient production timelines, ensuring every component is manufactured with consistency and precision from concept to completion.
Rapid Prototyping
We offer rapid CNC machining prototyping with short lead times and tight tolerances to accelerate your product development. High-quality machined prototypes support efficient design verification and functional performance testing.
Learn MoreLow and High-Volume Production
We support both small-batch and mass production CNC machining with stable process control. Our efficient production setup ensures consistent precision, reliable quality and on-time delivery for all production volumes.
Learn MoreOptimize Your CNC Machining Costs
Our engineers review your designs and provide cost-effective CNC machining solutions for metal parts, helping you reduce production costs, optimize processes, and ensure consistent quality for prototypes and small-batch production.
Tolerances for CNC Machining
For metal parts, CNC machining tolerances are applied according to ISO 2768-m unless otherwise specified. Tighter tolerances can be specified for specific features and are reviewed before production.
| Specification | Details |
|---|---|
| Maximum Part Dimensions |
Milling: up to 4000 × 1500 × 600 mm Turning: up to 200 × 500 mm |
| Minimum Part Size | 1 × 1 mm |
| Minimum Feature Size | Φ 0.50 mm |
| Linear Dimensions | ±0.025 mm |
| Standard Tolerances | ±0.01 mm (ISO 2768-m) |
| Shaft Diameters | ±0.025 mm |
| Minimum Wall Thickness | 0.5 mm |
| Minimum Tool Diameter |
End mill: 0.5 mm Drill: 1 mm |
| Non-Reamed Hole Tolerance | ±0.02 mm |
| Surface Finish |
As-machined: 125 Ra or better Optional finishing on request |
| Standard Lead Time | Typically 3 business days |
CNC Machining Materials We Process
ZH Precision offers CNC machining of aluminum alloys, carbon steel, stainless steel, and copper alloys to meet different requirements for strength, weight, and corrosion resistance.
All parts are machined according to customer drawings, with engineering support for material selection when needed.
Aluminum Alloys
Aluminum alloys are lightweight, strong, and highly machinable, with excellent corrosion resistance and superior thermal and electrical conductivity. They are ideal for aerospace, automotive, electronics, medical devices, and consumer products.
Stainless steel
Stainless steel alloys deliver high tensile strength, exceptional corrosion resistance, superior temperature stability and excellent ductility. Easy to weld, precision machine and polish, they are ideal for high-performance CNC machined components used in aerospace, automotive, medical devices and industrial applications.
Copper
Copper offers exceptional thermal and electrical conductivity, making it perfectly suited for electrical components including busbars and wire connectors. Its natural reddish‑orange appearance and smooth finish also support both decorative and functional applications.
Titanium
Titanium is a lightweight metal with an outstanding strength-to-weight ratio, low thermal expansion and high corrosion resistance. Its biocompatibility and sterilizability make it widely suitable for aerospace, automotive and medical applications.
Mild steel
Mild steel is a low-carbon alloy with reliable mechanical strength, high rigidity, excellent machinability and weldability at a cost-effective price. It can be carburized to improve surface hardness, making it widely used in industrial, structural and general manufacturing applications.
Superalloys
Superalloys deliver exceptional high-temperature strength, excellent oxidation and hot corrosion resistance, as well as superior fatigue and fracture toughness. They are mainly used in aerospace and energy applications that require consistent, reliable performance under extreme operating conditions.
Brass
Brass offers excellent wear resistance, high strength and hardness, along with strong corrosion resistance. It is well suited for valves, gears and precision components including watch movements.
Alloy steel
Alloy steel delivers high strength, excellent toughness, and superior wear and corrosion resistance. It performs reliably under extreme temperatures and can exhibit magnetic properties, making it well suited for industrial and structural applications.
Surface Finishing for CNC Machined Parts
ZH Precision provides tailored surface finishing for CNC machined parts, including anodizing, powder coating, plating, and polishing. All finishes are inspected for consistent quality and durability, ensuring both functional performance and aesthetic appeal.
As Machined
As machined finish leaves the surface straight from the CNC machine, providing a cost-effective option with tool marks.
Anodizing
Enhances corrosion resistance and surface hardness while adding color for improved durability and appearance.
Polishing
Polishing achieves a high gloss finish, reducing surface roughness and enhancing the aesthetic appeal of metals.
Sand Blasting
Sand blasting uses pressurized sand or other media to clean and texture the surface, creating a uniform, matte finish.
Tumbling
Tumbling smooths and polishes small parts by friction and abrasion in a barrel, offering a consistent but slightly textured finish.
Electropolish
Electropolish is a chemical process that smooths and brightens surfaces while improving corrosion resistance.
Alodine
Alodine coating provides corrosion protection and improves paint adhesion, mainly used on aluminum surfaces.
Electroplating
Electroplating bonds a thin metal layer onto parts, improving wear resistance, corrosion resistance, and surface conductivity.
CNC Machining Quality Control
ZH Precision strictly follows ISO 9001:2015. Our quality inspection team uses advanced tools, including height gauges, profile projectors, CMMs, and Olympus metal testers, to ensure every part is thoroughly inspected. This allows us to deliver precise and reliable prototypes and high-precision custom components across industries.
1. Material Verification
All incoming materials undergo strict verification to ensure they meet project specifications and industry standards.
2. Precision Machining Oversight
Our experienced machining team maintains tight tolerances and consistent adherence to design specifications throughout the production process.
3. Final Inspection & Verification
Every finished part undergoes 100% dimensional, surface, and functional inspection, ensuring full compliance with customer requirements and ready-to-ship quality.
Why Do Engineers Choose ZH Precision?
Selecting the right CNC machining provider is essential for cost efficiency, process consistency, and long-term reliability. At ZH Precision, we focus on precise CNC machining, strict process control, and clear technical communication to deliver predictable, repeatable, and high-quality results for every project.
Fully Transparent Quoting
We provide fully transparent CNC machining quotes, outlining costs, lead times, and requirements for informed decision-making.
Flexible Production Capabilities
Ability to handle diverse part sizes and materials, adapting quickly to changing project requirements without compromising precision or quality.
Precision & Process Reliability
Robust CNC machining standards and repeatable workflows ensure every component meets strict dimensional and functional requirements.
On-Time Delivery & Scalability
Efficient scheduling and reliable lead times, with the capacity to scale from small runs to larger production, keeping projects on track.
Expert DFM & Engineering Support
Our engineering team offers free Design for Manufacturability (DFM) analysis to optimize part designs, reduce machining costs, avoid production risks, and improve overall part performance.
Full Material & Finishing Solutions
We support a full range of metal materials and secondary processes including anodizing, sandblasting, plating, and heat treatment, providing one-stop customized CNC machining solutions.
What Is CNC Machining?
CNC machining (Computer Numerical Control machining) is a high-precision subtractive manufacturing process that uses pre-programmed software to control multi-axis cutting tools. It removes material from a solid metal blank to produce custom CNC machined parts with tight tolerances and complex geometries.
At ZH Precision, we specialize in custom CNC milling, turning, and 5-axis machining for metal components used in aerospace, medical, automotive, and industrial applications. Unlike manual machining, this process delivers unmatched repeatability and dimensional accuracy, making it ideal for precision CNC parts that meet strict engineering specifications.
When to Use CNC Machining Services
You will benefit from professional CNC machining services when your project requires high-precision custom parts or components. It is especially ideal for complex geometries that cannot be achieved with manual methods, ensuring consistent quality and tight tolerances for critical applications.
CNC machining is also the right choice when you need fast and flexible production. Whether you require functional prototypes, small-batch validation runs, or scaled manufacturing, it adapts to different volumes with reliable lead times. This makes it perfect for engineering projects where precision, speed, and repeatability are non-negotiable.
Advantages of CNC Machining
1.High precision & tight tolerances: Achieves consistent accuracy down to ±0.005 mm, ensuring your precision CNC components fit and perform reliably.
2.Complex geometry capability: Multi-axis machines produce intricate shapes, undercuts, and deep cavities, ideal for custom CNC parts with challenging designs.
3.Wide metal material compatibility: Works with aluminum, stainless steel, titanium, brass, and superalloys, supporting diverse CNC metal machining needs.
4.Flexible production volume: Supports one-off prototypes, small-batch runs, and medium-volume production, perfect for low-volume CNC machining projects.
5.Fast lead times & repeatability: Eliminates human error and reduces production delays, delivering consistent quality across all custom CNC machining orders.
Frequently Asked Questions
A：To receive an accurate quote for your custom CNC machined parts, you can upload your 2D drawings or 3D CAD models along with your requirements for material, quantity, tolerances, and surface finishes. Our engineering team will perform a full review of your design, provide free DFM suggestions if needed, and send a transparent, itemized quote within 24 hours. The quotation clearly lists material costs, machining processes, inspection items, lead time, and total pricing with no hidden charges.
A：We implement a full quality control system throughout production for CNC machined components, including incoming material verification, in-process dimensional checks, and final inspection using CMM, calipers, gauges, and hardness testing. We can provide material certificates, dimensional inspection reports, and process records upon request. All parts are fully verified before shipment to ensure they meet your drawing specifications, industry standards, and functional performance requirements.
A：Yes, we regularly provide high-precision custom CNC machining services for complex aerospace, automotive, and medical components. Our 5-axis machining capabilities allow us to produce parts with deep cavities, angled surfaces, and intricate geometries while maintaining tight tolerances. We follow strict processing standards, stable production workflows, and complete traceability to meet the high-performance demands of critical applications.
A：We offer a complete range of surface finishing treatments for CNC machined metal parts to improve appearance, corrosion resistance, wear resistance, and durability. Available options include anodizing, sandblasting, brushing, passivation, electroplating, powder coating, heat treatment, and laser marking. We will recommend the most suitable finishing process based on your material, application environment, and performance needs.
A：Absolutely. We specialize in flexible low-volume production and prototype CNC machining services with no strict minimum order quantity. Whether you need 1 piece for functional testing, small batches for product validation, or larger runs for scaled production, we maintain consistent precision, stable processing, and reliable lead times. This makes us an ideal long-term partner for engineering development and industrial manufacturing projects.