A satellite frame is about the last place you would expect to find 3D printed plastic. Satellite structures are machined from aluminum for a reason: launch is violent, space is unforgiving, and nobody gets to drive out and fix a broken bracket in orbit. That is why a small Italian aerospace startup made industry news this week. NESST Srl designed, 3D printed, and validated a full CubeSat 3U primary structure in carbon fiber reinforced PEEK, and the test data showed mechanical performance comparable to the conventional aluminum alloys satellites normally use.
What actually happened
NESST Srl, working under a project funded by the Italian Space Agency and the European Space Agency, printed the CubeSat structure on a Roboze ARGO 500 platform in Carbon PEEK. According to reporting from TCT Magazine, testing and material characterization demonstrated that the fused filament fabrication parts delivered mechanical performance comparable to the aluminum alloys typically used in satellite structures. The material also met the outgassing requirements of the ECSS-Q-ST-70-02C space standard, which matters because plastics that vent gases in vacuum can fog optics and contaminate sensors.
The project is now moving into a second phase where the team plans to build functions directly into the printed structure, integrating things like wiring harnesses, electronics, and microfluidics into the frame itself. That is the part machined aluminum simply cannot do. And this is not an isolated result: just last month Airbus qualified the same Roboze platform running ULTEM 9085 for secondary structural aircraft parts.
I have a machined aluminum part. Can 3D printing actually replace it?
Yes, in many cases a machined aluminum part can be replaced with a 3D printed high performance polymer part such as carbon fiber PEEK, provided the loads, temperatures, and chemical exposure are reviewed first. The CubeSat result is a strong data point, but the honest engineering answer is that it depends on how your part is loaded. Carbon PEEK has outstanding strength for its weight, which is exactly why it can stand in for aluminum in a structure where every gram costs launch money. What it does not have is aluminum's ductility, so a part that survives abuse by bending needs a different conversation than a part that needs stiffness and low mass. A good print shop will ask what the part does before quoting it. We do exactly that review as part of our PEEK and ULTEM 3D printing service.
Why Carbon PEEK can stand in for metal
PEEK is a semi crystalline polymer that keeps its mechanical properties at temperatures that would soften ordinary printed plastics, and it shrugs off most chemicals, fuels, and solvents. Add chopped carbon fiber and the stiffness climbs dramatically while the density stays around half that of aluminum. That combination is why aerospace, energy, and semiconductor companies have been quietly swapping machined metal brackets, housings, and fixtures for printed PEEK family parts for years. The CubeSat story matters because it moves the material from secondary brackets into a primary structure, the actual skeleton of the spacecraft, with a space agency funded test campaign behind it.
There is also the point NESST's engineers are most excited about: printed structures can be consolidated. Where a machined assembly might be six parts, four fasteners, and two mating surfaces that need sealing, a printed structure can be one part with the cable channels already inside.
I need a part that handles heat and chemicals. What should I ask a print shop for?
Ask for a high temperature engineering polymer such as PEEK, carbon fiber PEEK, or ULTEM, and tell the shop your actual service temperature, the chemicals involved, and how the part is loaded. Those three facts decide the material faster than any datasheet browsing session. PEEK family materials handle continuous service conditions that melt PLA and PETG outright, and they resist fuels, oils, and most industrial solvents. The tradeoff is that they demand high chamber temperatures and dry filament handling, which is why most print shops do not offer them. We run them daily in our Rockville, MD shop and ship nationwide through our build and ship service, one offs included, no minimum order.
What this means for makers and engineering buyers
If a printed polymer frame can pass a space agency test campaign, the bar for your ground based part is a lot lower than you think. Fixtures, brackets, housings, manifolds, and replacement parts for discontinued equipment are all well inside the envelope that CubeSat structures now occupy. The practical takeaway for buyers: stop assuming metal is the default and start asking whether the part actually needs to be metal. The practical takeaway for makers: material selection is the whole game at this level, and disciplined printing, dry filament, controlled chambers, verified dimensions, is what makes the part usable.
If you build hardware in this space and want an honest technical writeup of your product, we review equipment and materials on this blog. Reach out to info@dcadditivepros.com.
Frequently asked questions
Can 3D printed plastic really be as strong as aluminum?
Carbon fiber PEEK can match the mechanical performance of common aluminum alloys in stiffness driven applications, which is exactly what NESST's space agency funded CubeSat testing demonstrated. It is not a universal swap: aluminum still wins where ductility or very high bearing loads matter, so the application review comes first.
What is Carbon PEEK and when should I use it?
Carbon PEEK is PEEK polymer reinforced with chopped carbon fiber, and it is the right choice when a part needs metal like stiffness, high temperature resistance, and chemical resistance at roughly half the weight of aluminum. Typical uses are aerospace brackets, drone and robotics structures, and fixtures that live near heat.
I only need one part. Can someone 3D print PEEK without a minimum order?
Yes, DC Additive Pros prints PEEK, carbon fiber PEEK, and ULTEM parts one at a time with no minimum order, made in the USA. Send a model or a physical part to reverse engineer and you get a quote, not a lecture about batch sizes.
How do I get a quote for a high temp 3D printed part?
Email info@dcadditivepros.com with your file or photos of the part, the service temperature, and what the part touches, and you will get a material recommendation and price. No file? Our scanning and reverse engineering service can start from the physical part.
DC Additive Pros is an independent manufacturer. We are not affiliated with, endorsed by, or sponsored by NESST Srl, Roboze, Airbus, the European Space Agency, the Italian Space Agency, or TCT Magazine. All trademarks belong to their respective owners.