[TowerTalk] Mast alignment was:refurbish a Thrust bearing
?
Stan Griffiths
w7ni@teleport.com
Mon, 14 Sep 1998 18:14:37 -0700
Just let me say there is an incredible amount of good sense in this post . . .
I absolutely agree with Pete's choice for a top section as well as the method
he has described to get things lined up. The only objection I have ever heard
of regarding the pointy top is that it is harder to stand on if you are trying
to do something with the top beam in a stack on a tall mast. Even then, you
can install some steps on it . . .
Stan w7ni@teleport.com
Pete Smith wrote:
> One of the best tips anyone ever gave me for ensuring mast-to-rotor
> alignment was to first carefully center and tighten the rotor-to-mast
> clamps, then tighten the rotor-to-shelf bolts, and finally tighten the
> shelf-to-leg u-bolts. It's self-aligning that way. By the same logic, you
> would want to tighten any mast bearings last of all.
> For that matter, the local big tower guru talked me out of using any sort
> of bearing at all for my tribander, suggesting instead that I use a Rohn
> pointy-top. As he says, a bearing that isn't there can't seize. They even
> come with a location for a set-bolt, so that when you need to remove the
> rotor you can just pry the mast up, set the bolt, and pull the rotor at
> leisure.
>
> 73, Pete Smith N4ZR
> n4zr@contesting.com
>
> "That's WEST Virginia. Thanks and 73"
>
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