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.
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" <email@example.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
> 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
> 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.
> TowerTalk mailing list