Custom Precision CNC Milling Parts Supplier
We offer CNC milling services at CMS that are very accurate for complicated parts with many surfaces made of metals and plastics. We have more than 60 high-tech CNC machining centers, including 3-axis, 4-axis, and 5-axis systems. We make parts with tolerances as low as ±0.005 mm. Our ISO-certified team makes sure that the quality is always the same, that the manufacturing process is as efficient as possible, and that deliveries are always on time for industries that need them.
Maximum part size for CNC Milling
| Machine Type | Maximum Size (L × W × H) | Minimum Size |
|---|---|---|
| 3-Axis Milling | 1000 × 800 × 500 mm | 5 × 5 × 5 mm |
| 4-Axis Milling | 800 × 600 × 500 mm | 5 × 5 × 5 mm |
| 5-Axis Milling | 600 × 500 × 400 mm | 5 × 5 × 5 mm |
Latest CNC Milling Cases
Take a look at some of CMS’s recent CNC milling projects. Each one shows how well we can do precision machining, control tight tolerances, and make surfaces look great in a variety of industries.
Why Choose us？
Choosing the right CNC milling partner determines not only precision and cost but also reliability and efficiency throughout your product lifecycle. At CMS, we combine advanced machinery, experienced engineers, and rigorous quality control to deliver world-class milled components.
Our CNC Milling Capabilities
CMS can do 3-, 4-, and 5-axis CNC milling on complicated metal and plastic parts with tolerances of up to ±0.005 mm.
We use advanced CAM systems to do contouring, drilling, threading, and pocketing.
CMS makes high-precision, ready-to-use parts from prototypes to mass production with in-house surface finishing and heat treatment.
10+
Years Focus on CNC Machining
30+
Precision CNC Mills
500+
CNC Milled Parts Delivery Per day
Metals
- Aluminum (2024, 5052, 6061, 6063, 6082, 7075 etc.)
- Stainless Steel (303, 304, 304L, 316, 316L, 17-4PH, 410, 420, etc.)
- Steel (1018, 1045, 4140, 4340, 40Cr, etc.)
- Tool Steel (D2, A2, O1)
- Brass, Bronze, Copper
- Titanium (Grade 1, 2, 5)
Plastics
At CMS, we maintain strict dimensional control in CNC milling through advanced inspection systems, including CMMs and optical measurement equipment. Our processes comply with international machining standards to ensure consistent accuracy and repeatability.
We typically machine parts according to the tolerances specified in your drawings. If no specific tolerances are indicated, we follow the ISO 2768-m standard.
Typical Tolerance Capabilities
| Category | Description | Typical Range | Inspection Method |
|---|---|---|---|
| General Tolerance | Standard precision for most milled components | ±0.05 mm | Calipers, micrometers |
| Precision Tolerance | For accurate fit, alignment, and assembly parts | ±0.01 mm | CMM, optical measurement |
| High-Precision Tolerance | For critical or complex geometries | ±0.005 mm | CMM (controlled environment) |
| Surface Roughness | Varies by material and machining process | Ra 0.4 – 3.2 μm | Surface roughness tester |
| Flatness / Parallelism | For precision mating surfaces | ≤0.01 mm / 100 mm | CMM, dial indicator |
All CNC milling operations are performed under ISO9001, IATF16949, and ISO13485 certified quality systems, ensuring reliable quality, full traceability, and consistent results from prototype to production.
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30+ CNC Machines — including 3-axis, 4-axis, 5-axis, Swiss-type, and automatic lathes for versatile production.
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Max Milling Capacity: up to 800 × 600 × 500 mm, supporting large and complex components.
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High Precision: tolerances as tight as ±0.005 mm for critical parts.
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High Efficiency: daily output up to 1,000 pcs, ensuring stable and rapid production.
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Fast Lead Time: 3–7 days for prototypes, 10–20 days for batch production.
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Certified Quality: all operations under ISO9001, IATF16949, and ISO13485 systems for full traceability and consistency.
CMS offers a full suite of surface finishing services to improve durability, appearance, and performance:
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Anodizing (clear, hard, black, colored)
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Powder coating and painting
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Heat treatment
All finishing processes comply with RoHS and REACH standards.
Milling Processes Offered
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3-axis and multi-axis CNC milling
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High-speed milling
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Pocketing, contouring, drilling, tapping, and threading
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Surface flattening, slotting, and edge finishing
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Complex 3D contour machining for molds and housings
Quality Assurance
We ensure consistent quality and precision in every CNC milled part through strict process control and advanced inspection systems.
- Tight Tolerance Control – Up to ±0.01 mm precision
- Advanced Inspection Equipment – CMM, optical projectors, micrometers, and gauges
- In-Process & Final Inspection – Quality checks at every stage of production
- Material Traceability – Certified raw materials with full documentation
- Stable Batch Production – Consistent quality from prototype to mass production
All operations are conducted under ISO9001, IATF16949, and ISO13485 certified quality systems, ensuring reliability, repeatability, and full traceability.
Application
You can use CNC-milled parts in many different types of manufacturing, such as making robots, medical devices, airplanes, cars, motorcycles, energy, consumer electronics, creative design changes, and even doing things yourself.
Get in touch today
Customer Reviews
“Outstanding Work”
Easy to work with, great communicator, quick response, flexible on product design, delivers as promised! An awesome experience all around!
Shona Jones
“Nice Surface”
It has been a pleasure working together on this project and will be doing business for years to come highly recommend
Shona Jones
“Good Parts”
Great to work with Parts were produced as per drawing with precision Delivery date was on time Looking forward to working with them for more jobs
Shona Jones
How to work with us?
Frequently Questions
If you have any questions in the process of product design and manufacturing, you can contact us to obtain expert support and provide the best solution for your product. Get support now ！
Knowledges from CMS
CNC Milling Tips
Angular milling vs end milling: geometry requirements, dovetail & V-groove capability, ±0.05° angle tolerance, combined process strategy & DFM guide for CNC parts.
1.What is Milling Milling machines, workpieces, fixtures and tools are required for the milling process. During the milling process, the
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CNC turning and milling compared: process differences, tolerances, when to use each, turn-mill machining for hybrid parts & cost comparison guide.
