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Re: [TowerTalk] Cutting 2" Heavy Wall Cr-Mo Mast Up on Tower

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Cutting 2" Heavy Wall Cr-Mo Mast Up on Tower
From: Pete Smith N4ZR <n4zr@contesting.com>
Date: Sun, 27 Jul 2014 10:55:40 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I would leave it - in case you ever decide to do something else, you can't uncut the mast.

73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.

On 7/27/2014 1:24 AM, Grant Saviers wrote:
If the CrMo is heat treated (and as hard as it should be) then all you will get is a dull blade in a portable bandsaw. A carbide tipped blade may work, but are fragile, a tungsten carbide abrasive coated blade will definitely work, but $$. Several cutoff blades 4 1/2" grinder will also get it done, but why and how safely, and where is the cut off piece going to go?

Grant KZ1W


On 7/26/2014 10:56 AM, Charles Gallo wrote:
Cordless portable bandsaw

--
73 de KG2V
Charlie

On Jul 26, 2014, at 1:47 PM, "Victor Walz" <n2pp@frontiernet.net> wrote:

I have a 22 ft (2" OD) heavy duty Cr-Mo mast presently installed up on a 100 ft Rohn 45 tower. It weighs 200+ pounds. I previously had a 4 el 20 meter yagi stacked 12 ft. above a 40 meter F12 yagi. I just finished removing both antennas for repairs and have decided not to reinstall the stack due to the complexity of the installation. I will be re-installing the 40 meter yagi and some VHF antennas on this tower. Consequently, I would like to
shorten the 22 ft mast by 10 ft.



I am looking for advice on the most efficient way to cut this very thick high strength mast in place. I would prefer to use battery-operated tools
such as a reciprocating saw(metal blade?) or a grinding tool (cutting
wheel?). I can run 120 VAC (about 200 ft extension cord) up the tower if
needed.



What would be the optimum method for cutting this mast without excessive
tower time?  Thanks in advance for any responses.



Vic,  N2PP

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