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Online CNC
machining services

Order low-cost, precision CNC machined parts from a network of manufacturers across America, China, Europe & India.

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  • Overseas shipping and customs included, no hidden costs
  • Lead times from 8 business days
  • 50+ metals and plastics, 10+ surfaces finishes
  • Tolerances down to ±.0008’’ (0.020 mm)
  • Rapid prototyping and full-scale production
  • ISO9001, ISO13485, AS9100
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Our online CNC machining services

3D Hubs uses state-of-the-art technology to bring custom CNC machining online. We work with a large network of manufacturing partners that together have over 1,600 milling and turning machines, which means we always have capacity and very competitive prices. It also means we can produce both complex prototypes and low-volume production runs of precision machined parts, in a broad range of metals and plastics and with many surfaces finishes too. It’s like having an entire supply chain team for free.

3 & 5 axis CNC milling service
3 & 5 axis CNC milling
CNC turning service
CNC turning
Surface finishing service
Surface finishing
Get an instant CNC quote

Custom CNC machined parts made with 3D Hubs

We help mechanical engineers create custom machined parts for application in multiple industries, and sectors: aerospace, automotive, defense, electronics, hardware startups, industrial automation, machinery, manufacturing, medical devices, oil & gas and robotics.

Goodall_Design_Boat
Building the fastest sailboats in the world
“With [3D Hubs’] instant quoting...we just insert 20 different files and play around to see what’s possible and for what price”
goodall Laurent
Laurent Verbeeck
Commercial Manager and CEO
goodall design
LPS LaserTrain
How LPS reduced their manufacturing costs by 50% with instant Design for Manufacturing feedback
“When we started working with 3D Hubs, we noticed an immediate difference in lead time and product cost. Using the DfM tools for CNC machining to quickly iterate throughout the whole design process, we managed to reduce production costs by up to 50%”
LPS Harm
Harm Medendorp
Co-founder
lps
Kepler Satellite
Learn how Kepler rapidly went from a sketch on a napkin to a satellite in space with 3D Hubs CNC Machining
“The process of getting an order done on 3D Hubs is what you want as an engineer with limited time”
kepler Adam
Adam Latour
Lead Product Engineer
kepler

We use powerful automation to make
custom CNC machining easy

Instant quote for a part
Instant CNC machining quotes

Upload a CAD file, receive a CNC machining quote in seconds. No more back and forth with suppliers or long email chains.

Instant quote for a part
DfM tool feedback on a part
Automated DfM feedback

You automatically receive manufacturability feedback on all parts. No more waiting for a technician before knowing you can proceed to production.

DfM tool feedback on a part
Order tracking on our platform
Online order management

Easily manage orders online, track deliveries and share important details with others on your team.

Order tracking on our platform
Our experience in numbers
Engineers
145,000 engineers served
Businesses
35,000 businesses
Mps
240 manufacturing partners
Parts
5M+ parts & prototypes produced
Large building
27% of Fortune 500 companies
Machines
4200+ machines

Our distributed network of <br>CNC machining partners

Map of the world with points showing areas where we have suppliers with lines showing our distribution network
  • Globally distributed network

    Facilities spread across 4 continents means 24/7 on-demand capacity and reduced geo-related risk.

  • Consistently high quality

    We vet every manufacturer, handle all communications and customs, and ensure quality through our centralized QC facilities.

  • Competitive prices

    Competition between suppliers in our network keeps prices fair, unbiased and low.

  • Broad range of capabilities

    250 partners with a combined 4000+ machines means we can offer hundreds of processes and materials.

  • Globally distributed network

    Facilities spread across 4 continents means 24/7 on-demand capacity and reduced geo-related risk.

  • Consistently high quality

    We vet every manufacturer, handle all communications and customs, and ensure quality through our centralized QC facilities.

  • Competitive prices

    Competition between suppliers in our network keeps prices fair, unbiased and low.

  • Broad range of capabilities

    250 partners with a combined 4000+ machines means we can offer hundreds of processes and materials.

CNC materials

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CNC surface finishes

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Polishing (0.8 Ra μm/32 Ra μin)

Brushed + Anodized type II (Glossy)

As machined (Ra 3.2μm, 126μin)

Smooth machining (Ra1.6µm, 63 µin)

Bead blasted

Bead blasted + Anodized type II (Matte)

Polishing (0.8 Ra μm/32 Ra μin)

Brushed + Anodized type II (Glossy)

As machined (Ra 3.2μm, 126μin)

Smooth machining (Ra1.6µm, 63 µin)

Bead blasted

Bead blasted + Anodized type II (Matte)

Standard tolerances for CNC machining

The table below summarizes the standard tolerances of the parts produced by certified 3D Hubs Manufacturing Partners.

Part size / dimension Tolerance Angularity
< 12’’ (300 mm) ± .005’’ (0.125 mm) ± 0.5°
< 24’’ (600 mm) ± .010’’ (0.250 mm) ± 1.0°
< 36’’ (900 mm) ± 1/16’’ (0.400 mm) ± 1.0°

Larger parts are reviewed on request, submit an order to begin.

Size limitations for CNC machining

Maximal part size 1000 mm (40in)
Minimal part size 0.5 mm (0.02 in)
Minimal diameter 0.3 mm (0.01 in)

Larger parts are reviewed on request, submit an order to begin.

How we ensure high quality machined parts

Every order includes our standard inspection report. Further reports and certifications are available on request, submit an order to begin.

Standard
  • Critical dimensions
  • Quantity of parts
  • Removal of sharp edges and burrs
  • Number of parts inspected
  • Surface finish
  • Threads and tolerances
On request
  • Full dimensional inspection report
  • Material/mill test report
  • ISO9001, ISO14001, ISO27001 and IATF 16949 certifications
  • First article inspection for orders of 100+ units
  • Certificate of Conformance
Standard
On request
  • Critical dimensions
  • Quantity of parts
  • Removal of sharp edges and burrs
  • Number of parts inspected
  • Surface finish
  • Threads and tolerances
  • Full dimensional inspection report
  • Material/mill test report
  • ISO9001, ISO14001, ISO27001 and IATF 16949 certifications
  • First article inspection for orders of 100+ units
  • Certificate of Conformance
Download our full capabilities sheet

FAQ's

How much does your CNC machining service cost?

We use machine learning algorithms to calculate the exact cost of any machinable part directly from a CAD file, based on millions of CNC machining orders we’ve previously processed. No more waiting for technicians to get back to you via email, we can generate an exact quote for you instantly (well, in about 5 seconds).

This means you always know the price up front. Simply upload a CAD file to generate a quote: get an instant CNC machining quote. Our quotes are completely free, you only need to create an account so we can protect your IP.

It’s so easy to use that we encourage mechanical engineers to use it constantly as they optimise their designs for cost. Whenever you’ve made a new design iteration, simply load both the old and the new design into our quoting tool and see if the price is different.

This technology means our manufacturing partners also don’t need to do their own machining quotes, which means less overhead for them. This makes the whole process less expensive, which translates into lower prices for our customers.

How can I reduce the cost of my machined parts?

The main costs associated with CNC machining can be grouped into machining time, start-up costs, material costs, and feature costs. To reduce costs you need to understand the impact of these factors on cost.

The best way to reduce machining time is to design features that can be machined quickly, for example by choosing the correct radii for internal corners, reducing cavity depth, increasing wall thicknesses, limiting thread length and designing holes with standard sizes.

Material costs can be reduced by considering the size of the blank required, and the cost and machinability of the bulk material (softer alloys are faster to machine).

Start-up costs can be reduced by reducing the number part rotations or repositioning required to finish the part, for example by separating geometries into multiple parts that can be assembled later.

Feature costs can be reduced by only using tolerances when strictly necessary, removing all text & lettering, and avoiding multiple surface finishes.

These tips can be read in more detail in our full guide to reducing the cost of CNC machined parts.

How do you select the exact manufacturer for my parts?

We use algorithms to identify the best manufacturer in our network for your specific order, based on their proximity to you, their experience with similar parts and their available capacity right now. This allows us to balance our customers’ demands for speed, cost and quality better than ever before.

How do you guarantee the quality of my parts?

In manufacturing you’re only as good as your last order, so we take quality seriously.

We don’t just accept anyone into our network of manufacturing partners, we have a rigorous supplier vetting process and only accept top-performing partners to ensure we continue to deliver the highest quality parts to our customers. We also have people on the ground completing regular quality checks of our partners’ facilities.

We include a comprehensive, standardized inspection report with every order to ensure quality metrics are being met, and offer a first article inspection service on orders of 100+ units.

We also have multiple certifications available on request, including but not limited to ISO9001, ISO13485 and AS9100.

Follow this link to read more about our quality assurance measures.

Where can I learn more about CNC machining?

3D Hubs was started by mechanical engineers and we have many more engineers and technicians in our team. Together we’ve written a lot of content on CNC machining over the years. You can find a selection of resources below, or you can head to our knowledge hub and filter on CNC machining to read case studies, in-depth design guidelines and explanations of different surface finishes.

We’ve also written a complete engineering guide to CNC machining, which has been updated for 2020. Here you can learn about how the many different kinds of mills and lathes work and the different materials available, so you can easily compare their benefits & limitations. You’ll also learn the basic design rules for machining and the most common applications of each material and surface finish, so you can make the right choices every time.

CNC machining resources for engineers

CNC 101 - hero image 3

CNC machining: The manufacturing & design guide

Learn about how the many different kinds of CNC machines work, the materials available, the benefits & limitations, basic design rules and the most common applications.

Read article
Introduction to CNC machining

Introduction to CNC machining

Learn the basic principles and fundamental mechanics of CNC machining and how these relate to its key benefits & limitations.

Read article
How to design parts for CNC machining

How to design parts for CNC machining

A complete guide to design for CNC machining with basic & advanced design practices and tips to help you achieve the best results for your custom parts.

Read article
Minimizing the cost of CNC parts (13 proven design tips)

Minimizing the cost of CNC parts (13 proven design tips)

Cutting manufacturing costs is often the main priority when it comes to CNC machining. This comprehensive list of actionable guidelines are proven to reduce the cost of your machined parts.

Read article
How to prepare a technical drawing for CNC machining

How to prepare a technical drawing for CNC machining

Technical drawings are not necessary to request a quote, but they are still very important and widely used in the industry, as they improve the communication of technical requirements between the designer/engineer and the machinist.

Read article
Selecting the right CNC material

Selecting the right CNC material

This comprehensive guide compares the 25 most common materials used in CNC machining and helps you choose the right one for your application.

Read article
Surface Finishes for CNC Machinining

Surface finishes for CNC machining

A number of post-processing and finishing methods can be applied to improve the surface roughness, visual properties and wear resistance of machined parts. Learn about the most common metal finishes to help you select the most suitable ones for your application.

Read article
Heat treatments for CNC machined parts

Heat treatments for CNC machined parts

Learn how heat treatments can be applied to many metal alloys to drastically improve key physical properties like hardness, strength and machinability.

Read article
3D Printing vs. CNC machining

3D printing vs. CNC machining

Learn about the practical differences of CNC machining and 3D Printing and how to select the right technology for manufacturing end-use parts and functional prototypes.

Read article
CNC 101 - hero image 3

CNC machining: The manufacturing & design guide

Learn about how the many different kinds of CNC machines work, the materials available, the benefits & limitations, basic design rules and the most common applications.

Read article
Introduction to CNC machining

Introduction to CNC machining

Learn the basic principles and fundamental mechanics of CNC machining and how these relate to its key benefits & limitations.

Read article
How to design parts for CNC machining

How to design parts for CNC machining

A complete guide to design for CNC machining with basic & advanced design practices and tips to help you achieve the best results for your custom parts.

Read article
Minimizing the cost of CNC parts (13 proven design tips)

Minimizing the cost of CNC parts (13 proven design tips)

Cutting manufacturing costs is often the main priority when it comes to CNC machining. This comprehensive list of actionable guidelines are proven to reduce the cost of your machined parts.

Read article
How to prepare a technical drawing for CNC machining

How to prepare a technical drawing for CNC machining

Technical drawings are not necessary to request a quote, but they are still very important and widely used in the industry, as they improve the communication of technical requirements between the designer/engineer and the machinist.

Read article
Selecting the right CNC material

Selecting the right CNC material

This comprehensive guide compares the 25 most common materials used in CNC machining and helps you choose the right one for your application.

Read article
Surface Finishes for CNC Machinining

Surface finishes for CNC machining

A number of post-processing and finishing methods can be applied to improve the surface roughness, visual properties and wear resistance of machined parts. Learn about the most common metal finishes to help you select the most suitable ones for your application.

Read article
Heat treatments for CNC machined parts

Heat treatments for CNC machined parts

Learn how heat treatments can be applied to many metal alloys to drastically improve key physical properties like hardness, strength and machinability.

Read article
3D Printing vs. CNC machining

3D printing vs. CNC machining

Learn about the practical differences of CNC machining and 3D Printing and how to select the right technology for manufacturing end-use parts and functional prototypes.

Read article

Our other manufacturing services

3d printing part
3D printing

FDM, SLA, SLS, MJF, Polyjet, DMLS

Learn more 3d printing part
sheet metal part
Sheet metal

Laser cutting, bending, post processing

Learn more sheet metal part
injection molding part
Injection molding

Rapid tooling, family molds, multi-cavity molds and overmolding

Learn more injection molding part

Put your CNC parts into production today.

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