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CNC-milling

CNC Milling Service

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3- & 5-Axis MillingSurface finishingLead times from 5 days

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

Size Metric units Imperial units
Max. part size for soft metals [1] & plastics 2000 x 1500 x 200 mm 78.7 x 59.0 x 7.8 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

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.

cnc-5-axis machine

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)

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 As machined (Ra 3.2μm / Ra 126μin) This is our standard finish. Parts are machined and deburred, sharp edges are chamfered.
cnc-surface-smoothed 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.
bead blasting Bead Blasted Parts are bead blasted with glass beads which results in a grainy texture.
Brushed + Anodizing type II (Glossy) 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.
Bead blasted + Anodized type II (Matte) 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.
Anodized type III (Hardcoat) 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.
Powder coated Powder Coated Powder coating is a strong, wear-resistant finish that is compatible with all metal materials.
brushed-electropolished Brushed + Electropolished (Ra 0.8μm / Ra 32μin) Parts are brushed and electropolished. Ideal to reduce the micro-roughness of the part.
Black oxide Black oxide Applicable on steels, black oxide is a conversion coating used to improve corrosion resistance and minimize light reflection.
Chromate Conversion Coating (Alodine) 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.
brushed Brushed (Ra 1.2μm / Ra 47μin) Parts are brushed with a #400 - 600 grit. Ideal to reduce the surface roughness of the part.
hand-polishing-photo 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
cnc-illustration-SMALL FEATURES Min. feature size Ø 2.5 mm Ø 0.50 mm
cnc-illustration-INTERNAL EDGE Internal edges R 8 mm R 0.25 mm
cnc-illustration-MINIMUM WALL THICKNESS Minimum wall thickness 0.8 mm (for metals)
1.5 mm (for plastics)
0.5 mm (for metals)
1.0 mm (for plastics)
cnc-illustration-DRILLING Holes Diameter:standard drill bit sizes
Depth: 4 x diameter
Diameter: Ø 0.5 Depth: 10 x diameter
cnc-illustration-THREADS 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
Matt Farr, UK Strategic Account Manager Alex Vermolen Director of Sales EMEA
Jennifer Kaari, US Strategic Account Manager Jennifer Kaari US Strategic Account Manager
David Nguyen, EMEA Sales Engineer 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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