[TowerTalk] 8 pin rotor quick disconnects

Bill Turner wrt at dslextreme.com
Fri Aug 29 21:18:11 EDT 2003

On Fri, 29 Aug 2003 16:38:30 EDT, K7LXC at aol.com wrote:

>    I've never been able to get an M2 Orion rotator mast clamp to stay tight 
>for very long so I've started pinning them too. My opinion is that the bolts 
>stretch so no matter how secure the nuts are, the mast is eventually gonna slip 


Several years ago Loctite put out an engineering bulletin explaining
how bolts and nuts that are fully tightened can still work loose when
the load varies, especially when thrust is perpendicular to the bolt
axis.  Essentially, the bolt "levers" the nut loose over a period of
time, regardless of whether lockwashers are used or not.

Their solution, of course, was to use Loctite threadlocker, and my
experience is that it does work.  I'm retired from the avionics
business and when something had to stay tight absolutely, Loctite was
mandatory.  At least in our applications, I've never know it to fail.

73, Bill W7TI

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