CNC milling service

Our CNC milling services allow you to create 
industrial-grade parts and components with automated 
speed and precision.

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What is CNC milling?

CNC milling is a computer-controlled, subtractive machining process that uses rotating cutting tools to remove material from a solid, stationary workpiece in order to create custom-designed parts. During the milling process, the workpiece is cut along a number of axes to achieve a variety of shapes and geometries.   

 

Our CNC milling service is simple: upload your CAD file to our Cloud Manufacturing Platform™, work with us to optimize your design and choose your material, and then take your project to production quickly and efficiently. 

Our CNC milling services

Our CNC machining capabilities include both 3-axis, and 5-axis mills:

3 Axis CNC milling close up

3-Axis Milling

3-axis CNC milling involves cutting a stationary workpiece along three linear axes: left-to-right, back-and-forth, up-and-down. Easy to program and operate, 3-axis mills are effective for simple geometric designs and can be used for a wide variety of parts.

5-Axis Milling

5-axis CNC milling expands the design potential of the machining process by adding 2 axes of movement to the workpiece itself. With no need to reposition between operations, 5-axis milling allows for the faster production of more complex parts.

5 Axis CNC milling close up

For more on-demand manufacturing options, browse our CNC machining capabilities, including our CNC turning services.

Design considerations

The Fast Radius CNC milling process takes your project from prototype to production quickly and simply. Optimize your milled parts with the following design considerations, material choices, and finishing and post processing options:

CNC milling general process information

3-Axis Milling

5-Axis Milling

Maximum part size​

  • 1800 x 1000 x 500 mm
  • 70.9 x 39.4 x 19.7 in
  • 1000 x 900 x 600 mm
  • 39.4 x 35.4 x 23.6 in
Minimum part size
  • 12.7 x 12.7 x 12.7 mm
  • 0.5 x 0.5 x 0.5 in
  • 12.7 x 12.7 x 12.7 mm
  • 0.5 x 0.5 x 0.5 in

Minimum feature size

  • Ø 1 mm
  • Ø 0.039 in
  • Ø 1 mm
  • Ø 0.039 in

Standard tolerance

  • Metals: +/-0.13 mm (0.005 in)
  • Plastics: +/-0.20 mm (0.008 in)

Minimum wall thickness

  • Recommended size: 0.8 mm (0.031 in) for metals and 1.5 mm (0.059 in) for plastics
  • Feasible size: 0.5 mm (0.019 in) for metals and 1.0 mm (0.039 in) for plastics

Holes

Recommended size:

  • Diameter: standard drill bit sizes
  • Depth: 4 x diameter

 

Feasible size:

  • Diameter: Ø 0.5 mm (0.019 in)
  • Depth: 8 x diameter

Threads

Recommended size:

  • Size: M6 or larger
  • Length: 3 x diameter

 

Feasible size:

  • Size: M2.5

Lead time

  • As low as 8 days for less than 50 parts
  • As low as 10 days for less than 50 parts

CNC milling general process information

Maximum part size

3-Axis Milling

  • 1800 x 1000 x 500 mm
  • 70.9 x 39.4 x 19.7 in

5-Axis Milling

  • 1000 x 900 x 600 mm
  • 39.4 x 35.4 x 23.6 in

Minimum part size

3-Axis Milling

  • 12.7 x 12.7 x 12.7 mm
  • 0.5 x 0.5 x 0.5 in

5-Axis Milling

  • 12.7 x 12.7 x 12.7 mm
  • 0.5 x 0.5 x 0.5 in

Minimum feature size

3-Axis Milling

  • Ø 1 mm
  • Ø 0.039 in

5-Axis Milling

  • Ø 1 mm
  • Ø 0.039 in

Standard tolerance

  • Metals: +/-0.13 mm (0.005 in)
  • Plastics: +/-0.20 mm (0.008 in)

Minimum wall thickness

  • Recommended size: 0.8 mm (0.031 in) for metals and 1.5 mm (0.059 in) for plastics
  • Feasible size: 0.5 mm (0.019 in) for metals and 1.0 mm (0.039 in) for plastics

Holes

Recommended size:

  • Diameter: standard drill bit sizes
  • Depth: 4 x diameter

 

Feasible size:

  • Diameter: Ø 0.5 mm (0.019 in)
  • Depth: 8 x diameter

Threads

Recommended size:

  • Size: M6 or larger
  • Length: 3 x diameter

 

Feasible size:

  • Size: M2.5

Lead time

3-Axis Milling

  • As low as 8 days for less than 50 parts

5-Axis Milling

  • As low as 10 days for less than 50 parts

CNC milling materials

Plastic

ABS

Nylon 6

Acetal (Delrin)

Polycarbonate

PVC

HDPE

PTFE (Teflon)

PEEK

Nylon 30%GF

UHMW

Aluminum

2024

6061

6082

7050

7075

Stainless Steel

303

304

316

17-4

420

Other Steel

Mid steel

Alloy steel

Tool steel

Other Metal

Brass

Copper

Titanium

Contact us for additional metal machining options

CNC milling finishing and post-processing options

As machined (standard)

Anodizing

Powder coating

Bead blasting

Brushing

Painting

Polishing

Screen printing

Engraving

Heat treating

Passivating

Plating

Black oxide (steel)

Browse our CNC machining finishing and post-processing options here.

Get an instant quote
for your CNC milled parts

Use our quoting platform for quick quotes on production parts and prototypes.

Why choose CNC milling?

The CNC milling process is flexible and cost effective, and offers the following key benefits and challenges:

Benefits

  • Excellent design precision
  • Production consistency
  • Suitability for niche products
  • Established technology
  • Wide variety of materials
  • Scalability
  • Speed
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Challenges

  • Upfront design costs
  • Limited part geometry
  • Potential unused material waste
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CNC milling applications

From single, speciality parts to full production runs, CNC milling can be used to create a variety of industrial parts with applications that include:

Tooling

Manufacture parts with complicated cuts and different angles using a variety of cutting, drilling, and lathing tools.

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Niche manufacturing

CNC milling is capable of creating a range of niche, durable metal or plastic products that alternative manufacturing processes cannot.

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Medium-to-high-volume production

The CNC milling process is particularly useful for high-volume manufacturing runs, offering automated speed and cost benefits.

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Metal fabrication

CNC milling is a safe, effective way of creating high quality metal parts with exceptional tolerance levels.

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Hybrid manufacturing

CNC milling is not just a process suited to working with metals: molded and 3D printed parts can also be machined.

CNC turning icon

Rapid prototyping

The CNC milling process is fast, automated, and useful for the production of prototype parts.

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Explore CNC machining news and industry updates

Find industry news, resources, insight into the CNC milling process, and more, on the Fast Radius blog:

What type of CNC machining is right for my project?

How to save on CNC machining

When to use CNC turning over CNC milling: Everything you need to know

Fast Radius manufacturing solutions

Fast Radius manufacturing solutions, including CNC milling, serve customers across the world. Learn more about our capabilities:

CNC Machining

Precision computer-controlled machining processes, utilizing rotating drills, end mills, and lathes.

3D Printing

Fast, scalable, and cost-effective 3D printing technology for a variety of industrial applications.

Urethane Casting

Versatile mold-casting for the production of robust urethane components, customizable with colors and textures.

Injection Molding

Cost-effective plastic injection molding for precision, durable parts and low to high-volume production runs.

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