Printing TPU parts for drones

Why TPU on a drone

A rigid mount transmits every vibration into the camera and cracks on the first bad landing. TPU parts absorb impacts, damp motor vibration in footage, grip batteries without scratching them, and survive crashes that shatter PLA outright. Shore 95A — the common hardness — is flexible in thin walls and surprisingly rigid in thick sections, so wall count is your stiffness dial.

Print settings that behave

• Speed 25–40 mm/s — TPU buckles in fast extruders, especially Bowden setups
• Retraction minimal or off; wipe/coast to manage stringing instead
• Temperature 220–235°C; hotter improves layer bonding on load-bearing parts
• No cooling fan for maximum strength, light fan for cleaner overhangs
• Direct-drive extruders make TPU dramatically easier than Bowden

Design for the material

Use 3–4 perimeters and low infill (10–20%) for crash structures — perimeters do the work in flexible parts. Model straps and clips as living hinges rather than assemblies. For camera isolation, thin TPU bushings between rigid plates beat solid TPU blocks: geometry tunes damping better than material choice alone.

For arms and frame plates that must stay stiff, this is where carbon-filled nylon (PA6-CF) takes over — pair it with a hardened nozzle and aggressive drying, and let TPU handle everything that touches the world.

Field notes

Dry TPU before every serious batch; it strings wildly when wet. Slow the first layer further than you think — TPU grips PEI hard, so a slightly raised Z keeps removal clean. Test-crash a spare guard before trusting a design: five minutes of abuse on the bench beats a mid-flight surprise.