A short river fin for stand-up paddleboards with a standard US fin box. It's made for shallow rivers, where a full-size fin hits the bottom. It prints in one piece with an integrated bolt and is ready to use straight off the build plate. FITS Any board with a standard US box (e.g. Aqua Marina, Gladiator, Starboard, STX). VERSIONS (all have profiles) Standard, integrated bolt, fuzzy-skin finish: ~10 h, 185 g Thicker blade for extra strength: ~7.3 h, 241 g Separate-bolt version: there's a hole for a metal bolt (D4.5 × 14.5 mm, the kind used in factory fins) or for the printed bolt included on the plate (glue it in). The integrated bolt has been more than strong enough for me. This one is for anyone who wants to tinker. MATERIAL & SETTINGS PETG at 250–260°C, 100% infill, 100–200 mm/s. TPU (harder than 95A) should work but isn't tested yet. Don't use PLA (brittle) or ABS/ASA (weak layers). Also available: All-Round Fin for flat water and touring Hitting rocks is part of river paddling. Please post a Make showing how yours holds up.

SUP River Fin – US Box, 3D Printed PETG

by adliner · original on MakerWorld ↗

♥ 1⬇ 5🖨 2 prints

Print profiles

• Easy print witg thicker blade and for more strength.

  ⏱ 7h 20m · 241 g · 1 material(s)

  Prints on: P1S 0.4, P2S 0.4, H2S 0.4, H2C 0.4, X2D 0.4, H2D 0.4, A2L 0.4, X1 Carbon 0.4, H2D Pro 0.4, X1 0.4, A1 0.4, X1E 0.4, P1P 0.4PETG

  Not printable on our printers

• Easy print with fuzzy skin finish

  ⏱ 10h 18m · 185 g · 1 material(s)

  Prints on: P1S 0.4, X1 Carbon 0.4, X1 0.4, X2D 0.4, X1E 0.4, P2S 0.4, H2D 0.4, H2S 0.4, H2C 0.4, A1 0.4, P1P 0.4, A2L 0.4, H2D Pro 0.4PETG

  Not printable on our printers

• Version with a separate bolt for extra strength/tinkering

  ⏱ 10h 20m · 185 g · 1 material(s)

  Prints on: P1S 0.4, P1P 0.4, A2L 0.4, X1 Carbon 0.4, H2D 0.4, X1 0.4, A1 0.4, H2D Pro 0.4, H2S 0.4, P2S 0.4, X1E 0.4, H2C 0.4, X2D 0.4PETG

  Not printable on our printers