Roboze Carbon PEEK CubeSat Structure Passes ESA Space Qualification

Printing satellites without aluminum

NESST Srl, an Italian aerospace startup, has completed the first phase of a project funded by the Italian Space Agency and the European Space Agency. The goal was to design, 3D print, and validate a primary CubeSat 3U structure using Fused Filament Fabrication instead of conventional CNC-machined aluminum. The printer of choice was the Roboze ARGO 500 HYPERSPEED, running Carbon PEEK filament.

The results are strong. Testing showed the Carbon PEEK structure delivers mechanical performance comparable to the aluminum alloys traditionally used in satellite construction. The material also met the strict outgassing requirements defined by the ECSS-Q-ST-70-02C standard, which governs space environment compatibility. That combination of strength and purity is what makes the process interesting for missions where every gram counts and every material decision is scrutinized.

Why Carbon PEEK matters for space

Carbon PEEK is a high-performance thermoplastic. It resists heat, chemicals, and radiation far better than standard engineering plastics. It is also significantly lighter than aluminum, which matters in satellite design where launch costs are tied directly to mass. The catch has always been that printing Carbon PEEK reliably requires precise temperature control, high extrusion forces, and machines built for it. Most desktop FFF printers cannot handle the material. Roboze's ARGO 500 platform is designed specifically for these high-temperature, high-strength filaments, and the company supported NESST through the entire parameter optimization phase.

Francesco Lucia, technical manager at NESST, said the result marks a shift in how satellite structures are conceived: "Proving that FFF-processed polymers can rival traditional aluminum alloys represents a major change in satellite manufacturing thinking. This project validates our core vision: additive manufacturing is a strategic enabler for extreme structural customization and cost-efficiency."

From structure to functional satellite

The current part is the primary frame of a CubeSat 3U, the standard small satellite form factor used for research, technology demonstrations, and Earth observation. Phase 2 of the project will push further, using the design freedom of additive manufacturing to integrate wiring harnesses, electronics mounts, and microfluidic systems directly into the structure. That functional integration is the real promise of the technology: rather than assembling a frame and then bolting components to it, engineers can print a single part with channels, mounts, and passages built in.

Alessio Lorusso, founder and CEO of Roboze, framed the project as a proof point for the broader space economy: "Optimizing the FFF process for high-performance polymers is exactly what our technology is built for, and this project highlights the readiness of these materials for the evolving space economy."

The bigger picture

Small satellites are launching in growing numbers. Constellations for Earth observation, communications, and climate monitoring are expanding. Most of those satellites still rely on aluminum structures machined from billet or sheet. A validated, space-qualified polymer alternative that can be printed on demand reduces lead times, simplifies supply chains, and opens geometric possibilities that subtractive methods cannot match. NESST and Roboze have not yet flown the part in orbit, but the ground validation puts them closer to that milestone than most polymer space projects reach.