[TowerTalk] Motorized Crank Up for US Tower

[FireBrick]

I bought one, and it died within weeks.
When I called them about the warranty, they said that rating is for a
'horizontal' pulling load and not a vertical lift.

Grainger would not stand behind it.

I then bought a mechanical winch from Thern Winches, fitted the shaft to
take a Milwaukee Hole Hawg Drill.
Works much better, and I can take the drill inside out of the weather.
http://www.thern.com/product/worm/worm.htm


The Grainger Winch DID hold the position. The 'free wheel' and 'brake'
levers made me nervous.

It had a very short duty cycle, not long enough to fully raise or lower the
tower without stopping to let the motor cool down.

----- Original Message ----- 
From: "Michael Hatzakis, Jr" <mike at hatzakis.net>
To: <towertalk at contesting.com>
Sent: Sunday, June 08, 2003 3:49 PM
Subject: [TowerTalk] Motorized Crank Up for US Tower


>
> I had a thread on here a while ago about motorizing a US Tower MA-550
crank
> up tubular tower.  I am about to buy from Grainger a Dayton model 4Z327B
> (115vac 6amp) electric winch to replace the hand crank.  Before I do, I
want
> to be sure the thing can sustain the cable in a static position and am
> reviewing the specs.  It has about 4000lb pulling capacity dynamically.
>
> Does someone happen to know what the pull down force is on the MA-550 or
> even the MA-770, statically and dynamically?
>
> Michael K3MH
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
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>