Đồ Chơi Quay Tua-Bin "Turbine Fidget Spinner"

Turbine fan-blade style fidget spinner.  A good puff of air sets the spinner in motion. Center hole is 9mm and sized for a pencil or wooden dowel.  You can also hold gently by hand.  

This is an easy to print design with no supports needed.  Make sure you have good bed adhesion to ensure the thin blades don't release during the print.  I recommend a .4mm nozzle.  PLA works well.  ABS may require a heated chamber to prevent blades from warping.  35-50 minute print time depending on number of blades and your printer speed.  Design can be scaled-up for a larger print size.

Now including files for 8, 10, 12, 18, and 30 blade versions.  Which one works best for you?