STL, 3MF and OpenSCAD files: calibration prints, tools, brackets, enclosures, models.
The classic tugboat benchmark print that exposes overhang, bridging, dimensional and surface-finish problems in a 1 to 2 hour print.
Material: Any material; 100% scale, 0.2 mm layers, no supports, so you can check dimensions against the reference values
Two quick prints that check whether your printer can produce fine flexures and M3 nut traps; useful as a general tolerance test.
Material: PLA or PETG, 0.2 mm, no supports
Voron's 30 mm test cube with embossed V logo, used to verify flow, dimensional accuracy and cooling before printing printer parts.
Material: ABS/ASA per Voron (0.2 mm, 4 perimeters, 40% infill); PLA fine for calibration
Small practice block with M3 holes for learning to install brass heat-set inserts straight before committing to real parts.
Material: ABS/ASA or PLA, 0.2 mm, no supports
Tiny two-part case for the QT Py / QT Py RP2040 boards with STEMMA QT and USB-C openings.
Material: PLA, 0.15 to 0.2 mm, no supports
Two-part snap-together case for the Raspberry Pi Pico / Pico W with USB and pin-header cutouts; STEP included for remixing.
Material: PLA, 0.2 mm, no supports
Adafruit's CAD repo holds 900+ more enclosures under the same license.
Vented enclosure with fan duct for a Raspberry Pi Zero running the Pimoroni Enviro+ air-quality HAT.
Material: PLA/PETG, 0.2 mm
Clamp-on lever that fits a standard door handle so it can be pulled with a forearm; useful for accessibility and hygiene.
Material: PLA/PETG, 0.2 mm, 3+ perimeters
Prusa's LCD knob; fits most generic rotary encoder and potentiometer shafts as a quick replacement knob.
Material: PETG or PLA, 0.2 mm, no supports
One gears.scad file that generates involute spur, ring, bevel, herringbone, worm and complete planetary gear sets, plus a ready planetary example.
Material: PETG or PLA, 0.15 to 0.2 mm; herringbone needs no supports
Non-commercial license.
The classic OpenSCAD MCAD modules for involute spur and bevel gears and parametric ball-bearing models, for designing gearboxes and bearing seats.
Wrist-powered open-source prosthetic hand: palm, proximals, distals, tensioner block and pins, snap pins, arm guard and thermoforming jig. The standard e-NABLE community device.
Material: PLA or PETG, 0.2 mm, scale per recipient; supports for palm
Files in order: palm right, palm left, proximals, distals, tensioner block, tensioner pins, snap pins (labelled), arm guard, thermoforming jig.
OSIRIS-REx shape model of asteroid Bennu, the diamond-shaped rubble pile sampled in 2020; prints as a palm-sized solid.
Material: PLA, 0.15 mm, supports or flatten a pole
Three-piece 1U CubeSat demonstrator showing the standard 10 cm satellite bus structure.
Material: PLA, 0.2 mm, no supports
Single-plate simplified Mars Science Laboratory rover with snap-together parts and a PDF build guide.
Material: PLA, 0.2 mm, supports on
Desk model of JWST with its sunshield, body and segmented mirror; one plate with or without modelled supports.
Material: PLA, 0.15 mm
Two hemispherical relief models of the Moon from LRO topography, printable as halves and glued into a globe.
Material: PLA, 0.1 to 0.15 mm for crater detail, flat side down
Complete printable part set for the open-source, lab-grade flexure microscope with motorised XYZ stage and optics modules.
Material: PLA/PETG, 0.2 mm; see the printing guide for which parts need supports
Strongly reciprocal license: derivatives must stay open.
Scan of the original 1903 Wright Flyer from the National Air and Space Museum's open-access 3D collection. Download the print-ready STL from the object page.
Material: Thin geometry; scale up and use supports or resin
The Smithsonian's structured-light scan of the Apollo 11 command module Columbia, released as open-access 3D data. Download the print-ready STL from the object page.
Material: Decimate and scale before printing
Parametric generator for Gridfinity bins, lite bins and baseplates; open it in OpenSCAD's Customizer and export any size STL.
Material: PLA/PETG
Multi-file project; clone the repo rather than grabbing single files.
Ready-made Gridfinity-compatible STLs: a plain 1x1 bin plus workshop holders for 1-2-3 blocks, lathe tooling and a small vice.
Material: PLA/PETG, 0.2 mm, no supports
Bench stand that holds several single-channel micropipettes upright; handy as a small-tool organiser too.
Material: PLA, 0.2 mm
The ratcheting socket wrench design that was emailed to the ISS and printed in orbit in 2014. Prints in place as one part.
Material: PLA fine; print in place, check clearances at 0.15 to 0.2 mm
NASA logos and insignia are restricted; the model itself is not.
Winner of the Future Engineers Space Tool challenge: a single-print tool combining wrenches, drivers, a wire stripper and a measuring edge.
Material: PLA/PETG, 0.2 mm, no supports
Desktop rack with mixed-size holes for 0.2, 0.5, 1.5 and 2.0 mL tubes; works equally well for small parts, bits or pens.
Material: PLA, 0.2 mm, no supports
Prusa's two-piece printed spool holder; usable as a generic desktop filament spool holder.
Material: PETG, 0.2 mm, 20% infill, no supports
Snap-on clips that mount small PCBs (Pi, controller boards) to 35 mm DIN rail inside an electronics bay or control box.
Material: ABS/ASA or PETG, 0.2 mm, no supports