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Inflatable Costume Air Fan Ring — image 1
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Inflatable Costume Air Fan Ring

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A replacement locking ring for the inflation fan on inflatable costumes.

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Creative Commons — Attribution — Noncommercial

Print with standard supports for the threads.  You may want to print at a fine layer height to maintain detail on the detents on the threads.  I printed at .12mm layer height and they look great and hold well.

This is a remix of a model found on Thingiverse.  Changes made:

Added a flat flange at the bottom to increase clamping area and keep the fabric from slipping over the ring.

Most importantly added the detent bumps on top of the threads so that the tab on the mating threads locks in place.  (The last photo is of the locking bump on the mating thread on the fan housing.)

I also cleaned up the model some as it had several bodies which were overlapping and Cura wanted to print them all, in the same place, which was a disaster waiting to happen, A few other small refinements to the model were made as well.