Our CNC milling service capabilities
From prototyping to full production runs. Our 3 axis, 3+2 axis and full 5-axis milling centers will allow you to produce highly accurate and quality parts to meet even your most stringent requirements.
Can’t decide if 3-axis, 3+2-axis or full 5-axis machining is best for you? Upload your CAD file for a free quote and manufacturability review that will identify any difficult-to-mill features.
3-axis and 3+2-axis CNC milling
3-axis and 3+2 axis CNC milling machines have the lowest start-up machining costs. They are used to produce parts with relatively simple geometries.
Maximum part size for 3-axis and 3+2-axis CNC milling
| Size | Metric units | Imperial units |
|---|---|---|
| Max. part size for soft metals [1] & plastics | 2000 x 1500 x 200 mm 1500 x 800 x 500 mm |
78.7 x 59.0 x 7.8 in 59.0 x 31.4 x 27.5 in |
| Max. part for hard metals [2] | 1200 x 800 x 500 mm | 47.2 x 31.4 x 19.6 in |
| Min. feature size | Ø 0.50 mm | Ø 0.019 in |
[1] : Aluminum, copper & brass
[2] : Stainless steel, tool steel, alloy steel & mild steel
5-axis CNC milling
5-axis CNC milling centers can produce parts with complex geometries and increase productivity by minimizing the number of machine setups.
Maximum part size for 5-axis CNC milling
| Size | Metric units | Imperial units |
|---|---|---|
| Max. part size for all materials | 650 x 650 x 300 mm | 25.5 x 25.5 x 11.8 in |
| Min. feature size | Ø 0.50 mm | Ø 0.019 in |
Available materials for CNC machining
Here is a list of our standard CNC machining materials available through our online platform.
CNC Metals
| Aluminum | Stainless steel | Mild, Alloy & Tool steel | Other metal |
|---|---|---|---|
| 6061-T6 | 303 | Mild steel 1018 | Brass C360 |
| 6082 | 304L | Copper C101 | |
| 7075-T6 | 316L | Mild steel 1045 | Copper C110 |
| 5083 | 2205 Duplex | Alloy steel 1215 | Titanium Grade 1 |
| 5052 | 17-4 | Mild steel A36 | Titanium Grade 2 |
| 15-5 | Alloy steel 4130 | Invar | |
| 2014 | 416 | Alloy steel 4140 | Inconel 718 | 2017 | 420 | Alloy steel 4340 | Magnesium AZ31B |
| 2024 | 430 | Tool Steel A2 | |
| 6063 | 440C | Tool Steel A3 | |
| 7050 | 301 | Tool Steel D2 | |
| A380 | Tool Steel S7 | ||
| MIC 6 | Tool Steel H13 | ||
| Tool Steel O1 |
CNC Plastics
| Plastics | Reinforced Plastic |
|---|---|
| ABS | Garolite G-10 |
| Polypropylene | Polypropylene (PP) 30%GF |
| Nylon 6 | Nylon 30%GF |
| Delrin (POM-H) | FR-4 |
| Acetal (POM-C) | PMMA (Acrylic) |
| PVC | PEEK |
| HDPE | |
| UHMWPE | Polycarbonate | PET | PTFE (Teflon) |
Gallery of CNC machined parts
We machine rapid prototypes and low-volume production orders for customers in multiple industries: aerospace, automotive, defense, electronics, hardware startups, industrial automation, machinery, manufacturing, medical devices, oil & gas and robotics.
Available surface finishes for CNC machining
Surface finishes are applied after machining and can change the appearance, surface roughness, hardness and chemical resistance of the produced parts.
| Name | Description | |
|---|---|---|
 |
As machined (Ra 3.2μm / Ra 126μin) | This is our standard finish. Parts are machined and deburred, sharp edges are chamfered. |
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Smooth machining (Ra 1.6μm / Ra 63μin) | Smooth machining is like an ‘As machined’ finish but with slightly less evident machine marks. Parts are machined at a lower feed, no hand polishing is applied. |
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Bead Blasted | Parts are bead blasted with glass beads which results in a grainy texture. |
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Brushed + Anodized type II (Glossy) | Parts are brushed and then anodized type II. Ideal for increasing the corrosion resistance of the part. Typically results in a glossy color. |
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Bead blasted + Anodized type II (Matte) | Parts are bead blasted and anodized type II. Ideal for increasing the corrosion resistance of the part. Results in naturally matte colors. For glossy colors, please select the brushed anodizing option. |
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As machined + Anodized type III (Hardcoat) | Parts are machined and an anodizing type III coating is directly applied to the surface. Ideal to improve corrosion and wear resistance of components. |
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Powder Coated | Powder coating is a strong, wear-resistant finish that is compatible with all metal materials. |
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Brushed + Electropolished (Ra 0.8μm / Ra 32μin) | Parts are brushed and electropolished. Ideal to reduce the micro-roughness of the part. |
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Black oxide | Applicable on steels, black oxide is a conversion coating used to improve corrosion resistance and minimize light reflection. |
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Chromate conversion coating | Parts are machined and a chromate conversion coating is applied. Ideal to increase the corrosion resistance of the part while maintaining its conductive properties. RoHS compliant. |
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Brushed (Ra 1.2μm / Ra 47μin) | Parts are brushed with a #400 - 600 grit. Ideal to reduce the surface roughness of the part. |
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Polishing (Ra 0.8μm / Ra 32μin) | Parts are manually polished in multiple directions. Surface is smooth and slightly reflective. |
Other surface finishes are also available. Learn more about our metal and plastic surface finishing capabilities here.
Tolerances
We follow ISO 2768 standards for CNC Machining.
| Limits for nominal size | Plastics (ISO 2768- m) | Metals (ISO 2768- f) |
|---|---|---|
| 0.5mm* to 3mm | ±0.1mm | ±0.05mm |
| Over 3mm to 6mm | ±0.1mm | ±0.05mm |
| Over 6mm to 30mm | ±0.2mm | ±0.1mm |
| Over 30mm to 120mm | ±0.3mm | ±0.15mm |
| Over 120mm to 400mm | ±0.5mm | ±0.2mm |
| Over 400mm to 1000mm | ±0.8mm | ±0.3mm |
| Over 1000mm to 2000mm | ±1.2mm | ±0.5mm |
| Over 2000mm to 4000mm | ±2mm |
- Please clearly indicate tolerances for nominal sizes below 0.5mm on your technical drawing.
CNC milling design guidelines
The table below summarizes the recommended and technically feasible values for the most common features encountered in CNC machined parts.
| Feature | Recommended size | Feasible size | |
|---|---|---|---|
 |
Min. feature size | Ø 2.5 mm | Ø 0.50 mm |
 |
Internal edges | R 8 mm | R 0.25 mm |
 |
Minimum wall thickness | 0.8 mm (for metals) 1.5 mm (for plastics) | 0.5 mm (for metals)1.0 mm (for plastics) |
 |
Holes | Diameter:standard drill bit sizesDepth: 4 x diameter | Diameter: Ø 0.5 Depth: 10 x diameter |
 |
Threads | Size: M6 or larger Length: 3 x diameter | Size: M2 |
Learn more in our Engineering Guide to CNC machining.
Quality assurance
- ISO9001 certified Manufacturing Partners on request
- Inspection report included in every order. Full dimensional inspection reports on request
- Material certifications and test reports available on request
- Batch inspection in concurrence with ISO2859
- Strict NDA agreements with all Manufacturing Partners
- Manufacturing Partner performance tracking on lead time and quality
Neil Gilbody
Sales Director EU
Jennifer Kaari
US Strategic Account Manager
David Nguyen
EMEA Sales Engineer
For businesses of all sizes
Get in touch with our team to access these services:
- Add Hubs as a vendor
- ISO 9001, material certifications, test reports and full dimensional reports
- Non-disclosure agreements
- Urethane casting and part marking
- Sample verification program (learn more)
- Dedicated account manager
Call us directly on , or email us at sales@hubs.com
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