CNC Milling
From prototype machining to high-volume production, our advanced 3-axis, 4-axis, and 5-axis CNC milling centers enable the manufacture of complex precision components with exceptional accuracy, superior surface finishes, and consistent quality for demanding industries.
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Wide range of metals, plastics, finishes and machining options
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Engineering support, fast quotation and technical assistance
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3-axis, 4-axis and 5-axis milling, efficient production
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Tolerance up to ±0.01mm, excellent surface finish quality
CNC Milling Services
CNC milling utilizes advanced 3-axis, 4-axis, and 5-axis machining technologies to produce precise metal and plastic components for prototypes, low-volume runs, and full-scale production.
Advantages of CNC Milling
High Precision
CNC milling delivers excellent dimensional accuracy and repeatability for complex components with tight tolerances.
Complex Shapes
Advanced milling capabilities enable the production of intricate features and complex geometries with ease.
Material Flexibility
Suitable for machining a wide range of metals and engineering plastics for various applications.
Production Scalability
Supports everything from prototype development to high-volume manufacturing with consistent quality.
CNC Milling General Tolerances
Cixin follows strict manufacturing and quality control procedures to ensure precision, consistency, and on-time delivery. CNC milling tolerances are applied according to DIN ISO 2768 standards unless otherwise specified. Tolerances may vary based on part geometry, material, and processing requirements. Our engineering team evaluates every project to achieve optimal machining accuracy.
Linear Dimension Tolerance (ISO2768-1, ± Tolerance Value)
| Nominal Size Range | f(Fine) | m(Medium, Default Metal CNC) | c(Coarse, Default Plastic) | v(Very Coarse) |
| 0.5～3 | ±0.05 | ±0.10 | ±0.20 | - |
| ＞3～6 | ±0.05 | ±0.10 | ±0.30 | ±0.50 |
| ＞6～30 | ±0.10 | ±0.20 | ±0.50 | ±1.00 |
| ＞30～120 | ±0.15 | ±0.30 | ±0.80 | ±1.50 |
| ＞120～400 | ±0.20 | ±0.50 | ±1.20 | ±2.00 |
| ＞400～1000 | ±0.30 | ±0.80 | ±2.00 | ±3.00 |
| ＞1000～2000 | ±0.50 | ±1.20 | ±3.00 | ±4.00 |
Chamfer & Radius Edge Tolerance (ISO2768-1, ± Tolerance Value)
| Nominal Edge Size | f(Fine) | m(Medium) | c(Coarse)v | (Very Coarse) |
| 0.5～6 | ±0.20 | ±0.20 | ±0.40 | - |
| ＞6～30 | ±0.50 | ±0.50 | ±1.00 | ±2.00 |
| ＞30 | ±1.00 | ±1.00 | ±2.00 | ±4.00 |
Angular Dimension Tolerance (ISO2768-1, Angle Deviation)
| Short Edge Length(mm) | f(Fine) | m(Medium) | c(Coarse) | v(Very Coarse) |
| ≤10 | ±1° | ±1° | ±1°30′ | ±3° |
| ＞10～50 | ±30′ | ±30′ | ±1° | ±2° |
| ＞50～120 | ±20′ | ±20′ | ±30′ | ±1° |
| ＞120～400 | ±10′ | ±10′ | ±15′ | ±30′ |
| ＞400 | ±5′ | ±5′ | ±10′ | ±20′ |
Geometric Tolerance (ISO2768-2, H/K/L Grade; Unit:mm, Default Mark: K)
| Measuring Length | H(Precision) | K(Medium Default)L(Coarse) | |
| ≤10 | 0.02 | 0.05 | 0.10 |
| ＞10～30 | 0.05 | 0.10 | 0.20 |
| ＞30～100 | 0.10 | 0.20 | 0.40 |
| ＞100～300 | 0.20 | 0.40 | 0.80 |
| ＞300～1000 | 0.30 | 0.60 | 1.20 |
Part lengths of up to 118" are available on our platform process dependent. Please inquire about anything larger. Tolerances listed here are minimums for an ideal case. Looser tolerances may be required depending on process, material choice, or part geometry. contact us
CNC Milling Materials
A variety of machined metal and plastic part options are available for custom projects. Contact us for a quote.
- Aluminum 6061
- Aluminum A5052
- Aluminum Alloys AL7075 / 7050 / 7451
- Brass
- Copper (CU)
- Titanium Alloy
- Magnesium Alloy
- ABS
- PC
- POM
- Nylon
- PMMA
- PEEK
- PPS
- PPE
- PPS+GF40%
- PES
- PVC
- PTFE
- Ultem 1000
- ABS+PC
- Aluminum 6061
Aluminum 6061
Aluminum 6061 is a lightweight, versatile alloy with excellent strength, corrosion resistance, and weldability. Widely used in aerospace, automotive, marine, and structural engineering.
Density:
2.8 g/cm³
- Aluminum A5052
Aluminum A5052
Aluminum A5052 is a strong, corrosion-resistant alloy with excellent weldability, ideal for marine, automotive, and industrial applications.
Density:
2.8 g/cm³
Price:
approx. $ 2.98/kg
- Aluminum Alloys AL7075 / 7050 / 7451
Aluminum Alloys AL7075 / 7050 / 7451
Aluminum Alloys 7075, 7050, and 7451 are high-strength zinc-based materials with excellent fatigue resistance, widely used in aerospace, defense, and high-performance structural applications.
Density:
2.8 g/cm³
- Brass
Brass
Brass is a copper-zinc alloy known for its good mechanical properties, excellent corrosion resistance, and attractive golden color. It is widely used in decorative fittings, electrical components, plumbing, and precision machined parts.
Density:
8.9 g/cm³
- Copper (CU)
Copper (CU)
Copper is a versatile metal with excellent conductivity, corrosion resistance, and durability, widely used in electrical, industrial, and structural applications.
Color:
Brass/Bronze/Copper
Density:
8.9 g/cm³
- Titanium Alloy
Titanium Alloy
Titanium alloys are known for their high strength-to-weight ratio, excellent corrosion resistance, and good biocompatibility. They are widely used in aerospace, medical implants, chemical processing, and high-performance engineering applications. Despite being lightweight (density about 4.6 g/cm³), titanium alloys offer superior mechanical properties and resistance to extreme environments.
Density:
4.6
- Magnesium Alloy
Magnesium Alloy
Magnesium alloy is a lightweight metal alloy known for its high strength-to-weight ratio, excellent machinability, and good vibration damping. It is widely used in aerospace, automotive, and electronics industries where weight reduction is critical.
Density:
1.9 g/cm³
- ABS
ABS
ABS is a common thermoplastic known for its toughness and impact resistance. It is available in various colors including gray-white, beige, and black.
Color:
Gray-white, Beige, Black
Density:
1.2 g/cm³
- PC
PC
PC (Polycarbonate) is a tough, impact-resistant thermoplastic with excellent transparency and heat resistance.
Color:
Transparent / Black
Density:
1.3 g/cm³
- POM
POM
POM, also known as acetal or polyoxymethylene, is a high-strength engineering plastic known for its excellent wear resistance and dimensional stability.
Color:
Black / White
Density
1.4 g/cm³
- Nylon (PA6/PA66)
Nylon (PA6/PA66)
Nylon (PA6/PA66) is a strong, durable engineering plastic with good wear resistance and toughness. It is available in thick sizes and suitable for machining.
Color:
Black
Density:
1.3 g/cm³
Available Thickness:
110mm, custom ordered
Lead Time:
1–2 days
Price:
Approx. $5.30/kg
- PMMA
PMMA
PMMA, also known as acrylic, is a transparent thermoplastic with excellent optical clarity and weather resistance.
Color:
Transparent
Density:
1.2 g/cm³
- PEEK
PEEK
PEEK is a high-performance thermoplastic with exceptional strength, chemical resistance, and heat resistance. It is ideal for demanding applications in aerospace, medical, and electronics.
Density:
1.4 g/cm³
Chemical Resistance:
Excellent
- PPS
PPS
PPS is a high-performance engineering thermoplastic with excellent chemical resistance, high-temperature stability, and inherent flame retardancy. It is widely used in automotive, electronics, and chemical applications.
Color:
Black / White
Density:
1.4 g/cm³
- PPE
PPE
PPE is a lightweight engineering plastic with good dimensional stability, electrical insulation, and heat resistance. Often used in electrical components and structural parts.
Color:
Black
Density:
1.2 g/cm³
- PPS+GF40%
PPS+GF40%
PPS+GF40% is polyphenylene sulfide reinforced with 40% glass fiber, offering superior mechanical strength, heat resistance, and dimensional stability. It is ideal for demanding automotive and electrical applications.
Density:
1.7 g/cm³
Mechanical Strength:
Very high
- PES
PES
PES is a high-performance thermoplastic with excellent thermal stability, chemical resistance, and dimensional stability. It is commonly used in medical devices and electronics.
Color:
Black / Brown
Density:
1.3 g/cm³
- PVC
PVC
PVC is a widely used thermoplastic with good chemical resistance, flame retardancy, and electrical insulation. It is available in both rigid and flexible forms and is commonly used in pipes, panels, and insulation covers.
Density:
1.5 g/cm³
Chemical Resistance:
Excellent
- PTFE
PTFE
PTFE, commonly known as Teflon, is a high-performance fluoropolymer with excellent chemical resistance, low friction, and high temperature stability. Widely used in chemical, electrical, and sealing applications.
Density:
2.3 g/cm³
Chemical Resistance:
Excellent
- Ultem 1000
Ultem 1000
Ultem 1000 is a high-performance polyetherimide (PEI) resin known for excellent heat resistance, high strength, and flame retardancy. It is widely used in aerospace, electronics, and medical applications requiring sterilization.
Color:
Amber, Black
Density:
1.3 g/cm³
- ABS+PC
ABS+PC
ABS PC material machining is a blend of ABS and polycarbonate, combining toughness, impact resistance, and improved heat resistance. It is widely used in structural components and enclosures.
Color:
Black
Density:
1.3 g/cm³
If you do not see the material stock you are looking for, please choose "Custom" under the material drop-down on your quote page and submit for an expert engineering review once you have specified features, tolerances, inspection needs, and quantities required. contact us
Custom Milled Parts Delivered Fast
Our complete Custom Milled service supports your project from initial prototype development through to final part production, ensuring precision and quality at every stage.
Surface Finishing Options for CNC Milling
CNC milling naturally produces visible tool marks during the machining process. Surface finishing treatments can be applied to improve appearance, enhance durability, increase corrosion resistance, and meet specific functional requirements. Cixin offers a variety of surface finishing options to help achieve the desired performance and aesthetic quality for custom machined components.
| Name | Description | Services | Applicable Materials | |
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Machined Surface | Economical finish left directly from CNC machining, visible tool marks remain. | CNC milling & turning | Metals, plastics |
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Anodizing | Enhances corrosion and wear resistance; can be dyed, ideal for aluminum parts. | Type II & Type III anodizing | Aluminum |
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Polishing | Achieves high gloss, reduces surface roughness, and improves metallic aesthetics. | Manual or mechanical polishing | Metals |
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Sandblasting | Uses pressurized media to clean and texture the surface, creating an even matte effect. | Bead blasting / sandblasting | Metals, plastics |
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Brushed Finish | Creates a unidirectional satin texture, reducing the visibility of scratches and marks. | Brushing | Metals, some plast |
If you do not see the surface finish you are looking for, please choose “Custom” on the quote page. After specifying features, tolerances, inspection requirements, and quantities, submit for an expert engineering review — or simply contact us for support.
CNC Milling for Every Production Stage
Cixin provides CNC milling solutions from prototype development to full-scale production. With advanced machining capabilities and strict quality control, we deliver precision components for a wide range of industrial applications.
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Rapid Prototyping
Quickly validate designs and accelerate product development with precision CNC milled prototypes.
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Fast Turnaround
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High Accuracy
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Design Verification
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Low-Volume Production
Ideal for bridge production and small-batch manufacturing while maintaining quality, flexibility, and cost efficiency.
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Flexible Quantities
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Cost-Effective Production
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Reliable Quality
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Mass Production
Efficient CNC milling for large runs with consistent quality, repeatable accuracy, dependable delivery.
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Scalable Capacity
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Tight Tolerances
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Consistent Quality
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Quality Parts, Global Trust
Explore real-world case studies from our customers that showcase the power of our manufacturing capabilities to drive product development.
Frequently Asked Questions
Here are answers to common questions about precision CNC machining and custom part manufacturing. Need more details? Contact our engineering team at sales08@gd-prototype.com
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What services do you offer?
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Do you handle prototypes and low-volume production?
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How do you ensure quality?
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How fast can I get a quote?
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What's your typical lead time?
Get Your Parts Into Production Today
Our complete precision machining service supports your project from prototype development through to final part production, ensuring precision and quality at every stage.
