D20 with gyroid infill- Free CAD Models
If you're a big nerd like me, and got a new Selective Laser Sintering 3D printing machine, you're probably going to design a 20 sided die with a suite of engineering grade software.
CAD: Solidworks
Gyroid infill: nTop
Printer: SintraTec Kit
Clean up: Electric toothbrush & bead blaster
Nerd level: Dangerously high
Google Drive link to STEP Files of components and stl of final part





When I posted about this on LinkedIn, a friend asked about gyroids. If you're curious about them, here are my thoughts:
If you remember MC Escher drawings, he has a number with shapes that can repeat infinitely in 2 dimensions, with all of the edges perfectly mating. These are called tesselations. You can think of a Gyroid as a tesselation that repeats in 3 dimensions!
Officially a Gyroid is an "infinitely connected periodic minimal surface containing no straight lines" that was discovered by a scientist at NASA (Schoen) in 1970. They can be high performance structures in applications involving mechanical stressors including impacts, and fluid and heat transfer. Recently, gyroid geometries have become a popular infill in 3D printing, but that just scratches the surface of their beautiful potential.
If you want to learn more, the scientific paper linked below has a good description of gyroids in the introduction, and the YouTube link has a very cool application of using gyroids in a helicopter heat exchanger which uses the helicopter's fuel as the coolant!
https://www.sciencedirect.com/science/article/pii/S0264127519300176
https://www.youtube.com/watch?app=desktop&v=1qifd3yn9S0