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

[Grant Saviers]

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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