[TowerTalk] dxengineering U-bolts froze??

[Charlie Gallo]

On 4/13/2010 Bob AD5VJ wrote:

> The threads are ruined on the nut and the U-bolt since it seemed to cross
> thread as it came loose for no apparent reason.

> I would have hated to have been trying this on top of the tower hanging from
> a strap trying to get it apart.

> Has anyone else had a problem like this, I remember it wasn't hard to
> tighten when I assembled it as it went on very easily, just taking it off
> was very difficult.

It's not cross threading - it's called "galling", and it comes from the same alloy of stainless rubbing under pressure against the same alloy of stainless.  The 2 parts literally weld together.  One way to prevent it - coat the threads with neverseze (sp) before you remove the U-Bolt - BTW there is actually a copper based version that works really well too


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