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

[Pete Smith N4ZR]

I would leave it - in case you ever decide to do something else, you 
can't uncut the mast.

73, Pete N4ZR
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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 at 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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