Precision CNC Milling Services
We provide 3-axis, 4-axis, and 5-axis simultaneous CNC milling solutions. We specialize in the precision machining of parts with tolerances as low as ±0.005mm, serving the aerospace, medical, and automotive industries.
Tolerances as tight as ±0.005 mm
Over 50+ Metals and Plastics in stock
DFM feedback included with every quote
Core CNC Milling Capabilities
We have over 50 advanced CNC machining centers capable of handling milling tasks of varying complexity.
3-Axis Milling
Suitable for basic planar parts, simple cavities, and drilling operations, offering the best value for money.
4-Axis CNC Milling
Equipped with a rotary axis (A-axis), suitable for surface machining and multi-sided machining of cylindrical parts.
5-Axis CNC Milling
Top-tier machining capabilities, enabling the processing of complex geometries, impellers, and medical implants in a single setup.
CNC Milling Comparison (Summary)
| Axis | Movement | Best For | Main Advantage |
| 3-Axis | X, Y, Z | Simple, flat parts | Lowest cost and easy setup. |
| 4-Axis | X, Y, Z + Rotation (A) | Cylindrical or side-drilling | Machines sides without repositioning. |
| 5-Axis | X, Y, Z + 2 Rotations | Complex, curved shapes | Single setup for maximum precision. |
CNC Milling Materials
We machine a comprehensive range of materials to meet your specific application requirements, from common alloys to exotic specialty materials.
Metals
- Aluminum
- Brass
- Copper
- Stainless Steel
- Steel Alloy
- Steel Mild Low Carbon
- Titanium
Plastics
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Upload CAD drawings
Surface Finish on Milled Parts
Enhance the durability and aesthetics of your custom components with our professional CNC surface finishing services. Whether you need to eliminate machining marks or add a layer of industrial-grade protection, our finishes ensure your parts meet the highest functional and visual standards.
As Machined
Anodizing
Alodine
Black Oxide
Heat Treatment
Powder Coating
Sand Blasting
Polishing
Brushed Finish
Tumbling
Electropolish
Electroplating
CNC Milling Design Guidelines
To ensure the best balance between manufacturing cost and high precision, we recommend following these design standards for your CNC-machined parts.
Maintaining adequate wall thickness is critical to prevent part deformation during machining.
Metals: Recommended minimum 0.8mm (0.030″).
Plastics: Recommended minimum 1.5mm (0.060″).
Optimization Tip: Thinner walls increase vibration and reduce machining accuracy.
CNC milling tools are round, meaning vertical internal corners will always have a radius.
Recommended Radius: At least 1/3 of the cavity depth.
Best Practice: Use a radius slightly larger than the standard tool size (e.g., if a 6mm tool is used, use a 3.2mm radius) to reduce tool stress.
Optimization Tip: Avoid sharp 90-degree internal corners as they require expensive EDM (Electrical Discharge Machining).
Deep pockets can lead to tool deflection and chip evacuation issues.
Limit: Depth should ideally be no more than 4x the cavity width.
Maximum: Up to 10x width if using specialized tooling (increases cost).
Deep pockets can lead to tool deflection and chip evacuation issues.
Limit: Depth should ideally be no more than 4x the cavity width.
Maximum: Up to 10x width if using specialized tooling (increases cost).
Our standard machining tolerance is ISO 2768-m (Medium).
Standard: ± 0.125mm (± 0.005″).
Precision: Up to ± 0.005mm (± 0.0002″) upon request for critical features.
Advice: Only specify tight tolerances for critical mating surfaces to minimize unnecessary costs.
Our advanced CNC centers can handle parts up to:
CNC Milling: 1500mm x 800mm x 500mm (59″ x 31″ x 19″)
CNC Turning: 500mm (Diameter) x 1000mm (Length)
Why Choose Our CNC Milling?
Fast Quotes & DFM Feedback: Get professional quotes within 24 hours, including free Design for Manufacturing (DFM) analysis to optimize your costs.
On-Time Delivery Guarantee: We understand your timelines. Our streamlined production ensures your parts are shipped exactly when promised.
Material Certification: Every order comes with material and inspection reports, ensuring full traceability and peace of mind.
One-Stop Finishing Services: Save time by letting us handle everything from CNC machining to secondary surface treatments under one roof.
No Minimum Order Quantity: Whether it’s a single prototype or 10,000+ units, we provide the same level of precision and care.
Our CNC Milling Capabilities
We utilize high-speed 3-axis and 5-axis CNC machining to transform raw metal or plastic blocks into precision components. Our process starts with professional G-code optimization from your 3D CAD models, ensuring maximum efficiency and geometric accuracy.
Advanced Equipment: High-speed centers for everything from simple brackets to complex aerospace parts.
High Repeatability: Strict quality control for both rapid prototypes and mass production.
Total Solutions: Integrated surface finishing, including Anodizing (Type II/III) and Electroless Nickel Plating, delivering assembly-ready parts directly to you.
Precision CNC Milling Parts & Components
We specialize in manufacturing high-performance CNC milled components for diverse industrial applications. Our expertise covers everything from structural frames to intricate mechanical internals.
Core Component Categories:
Enclosures & Housings: High-precision shells for sensors, electronics, and medical devices, offering excellent EMI shielding and durability.
Structural Brackets & Plates: Custom-machined heavy-duty brackets and base plates designed for high load-bearing capacity and stability.
Precision Shafts & Axles: Milled shafts with tight tolerances, ensuring perfect alignment and smooth rotation in mechanical assemblies.
Heat Sinks & Cooling Blocks: Complex fin geometries machined from aluminum and copper for optimal thermal management in power electronics.
Manifolds & Valve Bodies: Intricate internal flow paths and porting for hydraulic and pneumatic systems with zero-leakage reliability.
Custom Fixtures & Tooling: Durable jigs and specialized assembly tools designed to streamline your production line efficiency.
FAQs
At Micromotorparts, we offer standard machining tolerances of ISO 2768-m (Medium), which is typically ±0.125mm. For high-precision projects in the medical or aerospace sectors, we can achieve tight tolerances as low as ±0.005mm (±0.0002") upon request for specific critical features.
We work with a wide range of over 50 metals and plastics. For high strength-to-weight ratios, Aluminum 6061 and 7075 are the most popular. For durability and corrosion resistance, we recommend Stainless Steel 304 or 316. We also machine engineering plastics like PEEK, POM (Delrin), and Nylon for components requiring electrical insulation or low friction.
We provide a free DFM (Design for Manufacturing) analysis with every quote. To minimize costs, we suggest:
Increasing internal corner radii to allow for larger tool diameters.
Limiting cavity depths to no more than 4x the tool width.
Designing parts with standard wall thicknesses (≥0.8mm for metals).
Specifying tight tolerances only for critical mating surfaces.
Yes. Our facility is equipped with advanced 5-axis simultaneous CNC machining centers. This technology allows us to manufacture complex shapes—such as impellers, turbine blades, and medical implants—in a single setup, which improves geometric accuracy and reduces the need for multiple fixtures.
For rapid prototyping, our typical lead time is 3 to 7 business days, depending on part complexity and surface finishing requirements. For mass production, we provide a streamlined schedule to ensure on-time delivery, often shipping within 2 to 4 weeks.
Get in touch with us
Contact our engineering experts today. We will analyze your designs and provide the precision CNC machining solutions that best suit your project specifications.
sale@micromotorparts.com
+86 15377730575
*Our team will answer your inquiries within 24 hours.
*Your information will be kept strictly confidential.