by msruggles, published
In case you missed it in the comments, the original screw and video were made by VeryWetPaint (http://www.thingiverse.com/VeryWetPaint).
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Filed down the large threads of the bolt a bunch, and now it works. Very cool trick, the reverse threads are much less noticeable on the physical object than in the 3D model rendering. (I printed at 50% scale)
Hmm. The "trick" thread and nut work perfectly, but the real nut won't work at all. Strange. I'll try scaling up the nut tomorrow.
Sure! I'd been holding back the STL files to keep people guessing how it worked, but now that the cat's out of the barn I'd be happy to share. But I'd still encourage people to try to guess how it works and try making your own version as msruggles did here.
My files might be challenging for hobby FDM printers, I'm not really sure. I used an unconventional sinusoidal thread profile, while msruggles used a more typical V profile.
Tonight I built an improvement that makes the nuts look even more alike without affecting the way they work. (Only the 'c
onventional' nut was changed.)
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