WingHopper · Designer · Guide · Sections · Reef · Methods · Pricing · FAQ
What the export contains, what fits on a bed, and what we do not know.
| Format | Needs | What it is |
|---|---|---|
| STL | Free account | Closed mesh with the mount tabs fused on, for a slicer |
| STEP | Pro | CAD solid with the exact surfaces, for a machine shop or another CAD package |
Both are in millimetres. On the US box, Tuttle and Power Box the pin and bolt holes are cut. FCS and Futures tabs come out solid because those systems clamp a grub screw against the tab face. If the exact CAD build fails, the STL export says so and either falls back to the preview mesh, with the holes missing and the file renamed, or refuses when that mesh is not sound.
Standing upright in a 220 mm cube: a thruster side fin is about 136 by 129 mm, a twin keel about 211 by 143 mm, a quad rear about 111 by 114 mm. Longboard singles and every windsurf fin are longer than that and need a larger printer, a service or a machine shop.
Print a tab on its own before a whole fin. The Mount tab's fit offset adds or removes up to 0.6 mm per face on the tab thickness, so a box that runs tight or loose can be matched without changing the fin.
We do not have a tested answer, and we would rather say that than invent one. FinHopper produces geometry; it runs no structural model on fins and no fin designed here has been ridden and reported back yet. Material, print orientation and infill decide whether a printed fin survives, and a fin that lets go at speed can injure you or someone near you. Treat a first print as a test piece, in conditions where a failure is an inconvenience rather than an accident. If you build one, tell us how it went.
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