CNC Machining Service & Custom CNC Fabrication In China

Get quotes on custom metal and plastic machined parts with our CNC Machining Service — including Custom CNC Fabrication for complex components. Make quick turn prototypes and production parts in days.

Serving Clients Worldwide From China. Dedicated Project Manager.

Strict quality control in precision machining workshops ensures the quality of complex parts — from prototypes to final products — whether for Custom CNC Fabrication or high-volume production.

Custom Parts Manufacturing Capabilities & Custom CNC Fabrication

CNC Machining Services

What is CNC Machining?

CNC, or computer numerical control machining, is a widely used manufacturing process that uses automated, high-speed cutting tools to remove material from a metal or plastic workpiece until the desired geometry is achieved. Standard CNC machines include 3-axis, 4-axis, and 5-axis milling machines, lathes, and routers — versatile equipment that powers Custom CNC Fabrication (the creation of tailored, one-of-a-kind components for specific applications).

CNC machines can cut almost any material such as metal alloys, plastics, wood, stones, ceramics and more — making them ideal for Custom CNC Fabrication projects that require precise, material-specific parts. From small prototype components to large-scale production pieces, this process enables the creation of custom machined parts needed for nearly every industry, including automotive, robotics, medical, aerospace, electronics and industrial.

150+

Experienced Engineers

200+

Up-to-date Machines

5000+

Satisfied customers

Advantages of CNC Machining

The subtractive process of CNC machining provides multiple benefits for both prototyping and production parts.

Precision and repeatability

Tight tolerances

Production-grade materials

Quick-turn parts within 1 day

Robust post-processing

Why Choose Us for Custom CNC Machining?

Fast and Reliable Delivery

Iterate part designs quickly and accelerate product development with quick-turn parts. Our automated design analysis will help spot any difficult to machine features before your design is sent to the manufacturing floor and save you from costly reworks further down the product development cycle.

Advanced Capabilities

Get anodizing, tighter tolerances, and volume pricing options through our network of manufacturers at Diode CNC Machining. You'll find plating (black oxide, nickel), anodizing (Type II, Type III), and chromate coating in larger part quantities; tolerances down to ±0.001 in. (0.020mm); and cost-efficient machined parts at higher volumes to lower piece-part price.

Material Selection

We stock more than 30 engineering-grade plastic and metal materials that are suitable for various part applications and industries. Materials range from plastics like ABS, polycarbonate, nylon, and PEEK to aluminum, stainless steel, platinum, and copper.

Infinite Capacity

Eliminate downtime spent waiting for parts and safeguard in-house machining with on-demand relief and infinite manufacturing capacity.

CNC Machining Materials

Aluminum

Aluminum 7075 is an alloy… making it a great option for Aerospace CNC Machined Parts (a key use case for our High Precision CNC Milling services). It has excellent mechanical properties and exhibits high strength, toughness, and resistance to fatigue. It has higher corrosion resistance than other aluminums, making it a great option for aerospace applications.

Copper

This material—also called HC (High Conductivity) Copper—boasts 100% nominal electrical conductivity and high thermal conductivity，making it a top choice for custom CNC-fabricated electrical components & conductors. It also offers high ductility and impact strength，enabling precise, complex designs in custom CNC machining applications.

Titanium

Titanium is a high-performance material ideal for custom CNC fabrication：it delivers extreme strength & high strength-to-weight ratio (critical for lightweight, durable CNC-machined parts), excellent corrosion resistance, and heat resistance (up to 1,000°F operating temp). Its low thermal expansion & 3,000°F+ melting point support precision in custom CNC machining—though it’s more costly than metals like aluminum for CNC fabrication projects.

ABS

ABS is a low-cost engineering plastic that is easy to machine. ABS is an ideal material for structural applications when impact resistance, strength, and stiffness are required. It’s widely used for pre-production prototypes since it has excellent dimensional stability and is easy to paint and glue.

Polycarbonate

Polycarbonate is an engineering plastic that offers excellent dimensional stability over a wide range of service temperatures. It is commonly used for structural applications when clarity and impact strength are essential. It can also be used in a wide range of electrical applications since it has a low moisture absorption, good insulating properties, and an excellent flammability rating.

Surface Finish Options for Precision CNC Machining & Custom Machined Parts

Surface finishes (critical for Custom CNC Machined Components) can serve either a functional or aesthetic purpose. Surface finishes that serve both purposes are deemed cosmetic finishes, and are used for Cosmetic CNC Fabricated Parts — producing these requires additional measures to minimize defects such as hang marks and scratches from tools.

Types

Details

Clear Coat

A cosmetic-grade clear finish for 3D printed parts, compatible with ABS-Like Translucent/Clear (Watershed XC 11122) and PC-Like Translucent/Clear (Accura 60) materials, enhancing surface aesthetics and light transmission.

Painting

After sanding & polishing pre-treatment, 3D parts can be finished with automotive-grade paint; provide a Pantone color code with your quote request. We also offer soft-touch painting for enhanced tactile & visual customization.

Plating

An electroless nickel plating process that creates cast aluminum/magnesium-like aesthetics for 3D printed components, ideal for metal-emulating functional & decorative parts.

Dyeing

A fast coloration method for 3D prints; with limited color options, it’s a cost-effective alternative to painting for low-volume budget-friendly coloring needs.

Decaling

A graphic application process to add logos or custom graphics to 3D parts, boosting both cosmetic appeal and functional branding.

Polishing

A surface refinement process that achieves a mirror-like finish for 3D parts; provide a drawing or reference image (to define finish expectations) for high-gloss appearance requirements.

Heat Treatment

A hardening & strengthening process for metal 3D prints, including NADCAP-certified heat treatment, hot isostatic pressing (HIP), solution annealing, and aging—improving mechanical performance & structural integrity.

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Testimonials / Satisfied Customers

Join over 1,000 companies that trust Diode.

Why not listen to what others have to say about Diode? These are real insights drawn from experience.

Their delivery speed is impressive, always on time from order to delivery. The communication skills and service attitude of Diode employees are also excellent, making the entire cooperation process smooth and efficient, which is crucial to our business. So I recommend it to anyone around me who needs custom machined parts.

Three years ago, I needed to develop new industrial products, and a partner recommended Diode company to me. With a trying attitude, I placed a sample order. So far, 50% of our company's stainless steel parts are ordered here. Design support and stable quality are the reasons why I have been unable to leave Diode.

The technical strength of the Diode team is impressive. The parts they produce are very precise and meet all our meticulous requirements. Every time we work together, they accurately deliver high-quality products, ensuring the success of our projects. Diode precision machining services are worthy of the name.

It was a great experience exceeded our expectations in every way. From the initial quote to final delivery, their team demonstrated professionalism, expertise, and a customer-centric approach that set them apart.

Diode Machining Precision CNC Machining Supplier in China

Diode Machining