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[TowerTalk] To pin or not

To: <>
Subject: [TowerTalk] To pin or not
From: (WA9ALS - John)
Date: Mon, 6 Sep 1999 18:58:28 -0500
Glad to read Barry's testimonial.  It seems like the ideal design would
be a pin that breaks before the rotator case or gears!  (Reminds me of
my bush hog - shear pin (AKA #5 bolt) breaks before the gearbox, but no
slippage under "normal" abuse, I mean use.  ;-)

WA9ALS - John

----- Original Message -----
From: Barry Kutner <>
To: <>
Sent: Monday, September 06, 1999 6:35 PM
Subject: RE: [TowerTalk] To pin or not

> I also pin the mast which holds a TH7 and Cushcraft 402CD turned
> by a T2X. Been up there almost 10 years. A few years ago, while
> up on the tower, I noted the bolt was cracked in half! I forget the
> exact alloy, but it was a high strength steel with some Beryllium in
> it. I did replace it with another bolt, and so far, it's still in one
> last I checked.
> Regarding drilling, I first tried with a standard bit - wouldn't dent
> stuff. Then, bought a Cobalt tipped bit labelled "for hardened metals
> including stainless steel." With some cutting oil, went thru like
> butter.
> 73 Barry

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