CNC Milling Parts
Access precision CNC-machined parts tailored for rapid prototyping and scalable production requirements.
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Our CNC milling process can complete the fabrication of production parts from prototype to final within a day. We utilize 3-axis, 4-axis, and 5-axis milling techniques to manufacture both metal and plastic components. In addition to First Article Inspection (FAI) reports, material certifications, outgoing inspection reports, and surface treatments such as anodizing and plating, you can also obtain precision parts with more competitive pricing and tighter cnc milling parts tolerances.
Our CNC milling service is commonly used for:
- Rapid prototypes
- Tooling and fixtures
- Aerospace components
- Automotive components
- Medical device parts manufacturing
CNC Machining Design Guide
In this comprehensive CNC machining guide, you will learn how to design metal and plastic components that comply with environmental requirements and maximize reductions in machining time, lower part costs, and enhance manufacturability.
CNC Milling Design Guidelines and Capabilities
Our comprehensive CNC milling primer offers crucial design insights to enhance part manufacturability, improve aesthetics, and minimize overall production time. For more detailed information, please visit our Design Guide section.
Maximum Dimensions
Maximum depth that can be milled is 2 in. (50.8mm) from either side of part. For specific milling dimensions by material, see maximum part extents for machining.
| Material | US | Metric | |
| 3-axis** | ABS | 10 in. x 14 in. x 1.75 in. | 254mm x 356mm x 44.5mm |
| Acetal | |||
| 3-axis** | ABS | 22 in. x 14 in. x 0.75 in. | 559mm x 356mm x 19.1mm |
| Acetal | |||
| Nylon | |||
| 3-axis** | Aluminum | 22 in. x 14 in. x 3.75 in. | 559mm x 356mm x 95.3mm |
| 5-axis | Hard metals* | 10 in. x 7 in. x 1.75 in. | 254mm x 178mm x 44.5mm |
| Brass | |||
| 5-axis | Copper | 10 in. x 7 in. x 2.75 in. | 254mm x 178mm x 69.9mm |
| 5-axis | Aluminum | 10 in. x 7 in. x 3.75 in. | 254mm x 178mm 95.3mm |
| Plastic |
*Hard metals: Titanium (6Al-4V), Stainless Steels (303, 304, 316, 17-4PH), Alloy Steel (4140)
**Denotes two-sided machining only
Minimum Dimensions
| US | Metric | |
| Size | 0.25 in. x 0.25 in | 6.35mm x 6.35mm |
| Tolerances | ±0.00040 in. | ±0.01mm |
Threading
Currently, we support metric threads from M2 to M14, imperial threads from 1/8″ to 1/4″, and ACME threads from 1/4″ to 1/8″. It’s also important to consider factors such as the part’s load requirements, operating environment, and ease of installation and maintenance during the design process.
Radii
Sharp internal corners on parts will naturally be rounded during the CNC machining process. The resulting fillets will be specified in your quotation.
CNC Milling Materials
We stock more than 30 production-grade plastic and metal materials that are suitable for various part applications and industries.
Metals
- Aluminum
- Brass
- Copper
- Bronze
- Beryllium Copper
- Stainless Steel
- Alloy Steel
- Tool Steel
- Steel Mild Low Carbon
- Titanium
Plastics
- ABS
- Acetal（POM）
- Nylon
- Acrylic (PMMA)
- Polycarbonate
- Polypropylene
- Delrin
Surface Treatment Standards
| Sandblasting | Electroplating | Anodizing | Heat treatment |
| ISO8501-1:2007 | ISO2082:2008 | ISO7599:2018 | ISO683-1:2016 |
| ASTM D4417-14 | ASTM B633-19 | ASTM B580-79(2018) | ASTM A255-10 |
Quick-Aluminum Finishing
CNC milling parts can be fully manufactured in just 3 days, including surface treatment:
- You can choose the appropriate materials and surface treatments based on the usage environment.
- Common aluminum materials used for milling parts include 6061, 6063, 7075, 2024, and others.
- Common surface treatment methods for aluminum milling parts include sandblasting oxidation, electroplating, and spraying, among others.
Surface Finish on Milling Parts
Surface finish is vital for improving the appearance, corrosion resistance, wear resistance, and mechanical properties of milled parts. Common finishing techniques include broken edge polishing, anodizing, electroplating, and painting, tailored to the material and application.
Material: Nylon
Finish: Broken edge
Material: Aluminum
Finish: Polishing
Material: Aluminum
Finish: Anodizing
Material: Aluminum
Finish: Electroplating
Material: Aluminum
Finish: Painting
What is CNC Milling ?
CNC milling is a widely used and precise method of material removal. This technology can manufacture detailed, complex parts with high accuracy. In the CNC milling process, a rotating cutting tool moves across the surface of a fixed workpiece, removing material to achieve the specified geometric shapes and dimensions.
CNC milling, which includes slot cutting, threading, and engraving, is ideal for producing components in aerospace, automotive, electronics, medical, and automation industries. It accommodates both simple and complex designs, from prototype creation to mass production, offering precision solutions for detailed material handling.