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Discussion Starter #1
I have made a leering skeleton that has worked for about 2 days and now is constantly unscrewing itself at the pivots.

Here is how I make my pivots.

new1.jpg

picture of the mechanics

move.jpg

video of when it stays together and the mechanics running.

 

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Funeral Crasher
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7,443 Posts
When I make the pivots on any prop I build, I always use the [Nut-Lock Washer-Nut] combo on EACH SIDE of the moving part.
I tighten the first nut loosely against the moving part, hold it in place with some needle nose pliers, then add the lock washer and the second nut. Tighten the second nut (while holding first nut in place). Then repeat on other side of moving part.

I've never had one come loose yet.
 

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3,521 Posts
When I make the pivots on any prop I build, I always use the [Nut-Lock Washer-Nut] combo on EACH SIDE of the moving part.
I tighten the first nut loosely against the moving part, hold it in place with some needle nose pliers, then add the lock washer and the second nut. Tighten the second nut (while holding first nut in place). Then repeat on other side of moving part.

I've never had one come loose yet.
That works too but the nylon insert lock nuts are easier.
 

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Funeral Crasher
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We did a group build one time and those nylon nuts kept coming loose.
I don't trust them, but that's just me.
 

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We did a group build one time and those nylon nuts kept coming loose.
I don't trust them, but that's just me.
The only way those will come loose is if there's not enough of the bolt or rod past the nut. There has to be at least 3 or 4 threads showing.
 
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