The Impossible Bolt

You don't Loctite anything. The object of the puzzle is to get the nut off and back on again. I made one a few years ago from Brass. I think one of the grandkids has it. It was taken to school for show and tell.

"Billy G"

Oh, I thought the puzzle was how is it made, not how do you get the nut off. Of course you don't want to loctite the pieces if you want to take it apart.
 
I have one where the nut holds the two threaded parts together. Each of the threaded parts has a shoulder that locks the other part, and keeps them from rotating. I'll have to find it and post photos, it's a similar, but different puzzle than the OP.
 
I'm going to make one of them ...I had seen one in the past and thought it was next to impossible to make , now I think I could pull it off.
 
Well folks, i think its been long enough. This is the site that I was inspired, but made a couple of tweaks.

http://www.frets.com/HomeShopTech/Projects/CaptiveNut/captivenut.html

The main difference is that there is no threaded stud, so I can truly say it was made from one piece of material. Two pieces, but MADE from A solid piece of material! Here are some photos.

image.jpg
image.jpg
image.jpg
image.jpg
image.jpg

The real "trick" is to make the seam invisible. The threads disguise the split, and even I can't find it! If you plan on making one, make sure that your shoulders are VERY square and flat before you start turning the major diameter, and threads.

Hope everyone enjoyed!

-Cody

image.jpg image.jpg image.jpg image.jpg image.jpg
 
I made one of these myself (well, similar, anyway), but I guess I cheated, as I didn't make it out of a single piece. I used two large diameter bolts with 1/2 of the shanks being plain, then cut off & discarded the threaded portions. I drilled out the end of one "bolt" & threaded it internally, then turned down the end of the other & threaded it externally, so the two screwed together, appearing to be a straight, plain shank with bolt heads at either end. I under cut the female end slightly, so as to end up with a really tight, seamless fit.

I then screwed them together, and threaded the outside of the shank between the bolt heads, resulting in a continuous thread with no visible seam. Took it apart one last time, threaded a nut onto it, then put it back together, nice & tight. Nut spins from one end to the other, no visible joint anywhere, and the bolt heads are clearly not added on or anything. Makes for a real head-scratcher!
 
Back
Top