Simple Christmas Pyramid

by 87squirrels, published

Simple Christmas Pyramid by 87squirrels Nov 16, 2017


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  • another christmas / winter themed design
  • modeled in fusion360
  • inspired by traditional german christmas pyramids (https://en.wikipedia.org/wiki/Christmas_pyramid)
  • simple, minimalistic approach
  • powered by rising/moving air from a heater / radiator / etc
  • do not use open flames!
  • uses a small magnet and some steel balls as a rotational bearing
  • there are model versions for 13mm steel balls, and 1/2" steel balls ("_inch")
  • the arc base structure consists of 3 parts glued together, make sure to sand the contact surfaces flat to make the assembly easier
  • ther are model versions for D10xH3mm and for D8xH3mm cylindrical magnets
  • you need to print "base" 3 times and one "bladering"
  • model units are [mm]
  • https://youtu.be/Eks_HvOsT2U

Edit 20171203

  • after a few weeks, the steel balls creating the rotational joint seem to have flat spots which increase friction and stop the rotation of the bladewheel
  • I added a very small steel ball (one from a 608 skate bearing) in between to decrease magnetic forces and minimize contact area
  • It works better than before and spinns and spinns and spinns
  • might not work for everybody, depends on how strong your magnets are

Print Settings

Printer Brand:








0.2 for the base, 0.15 for the bladering




  • brim recommended for bladering part, due to thin blade structure
  • I had some issues with blade warping during my prints
  • printed in DasFilament PETG

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