Have already cut the rod with a hacksaw with a new blade .. no
degradation of performance from first cut to last.
I tested the first 6+" length by stressing it with the lower tower
section and the tower base. Very strong stuff.
I agree that some kind of lacquer needs to be put on the insulator to
protect it from the 'weather demons' even though less than 1/4" is
exposed to the elements.
I'll let you know next Summer how it's holding up.
Don
N8DE
Quoting jimlux <jimlux@earthlink.net>:
> n8de@thepoint.net wrote:
>> FYI:
>>
>> I discovered a new source for insulator material that I will be using
>> on my 80m tower verticals.
>>
>> At the local 'feed store', I found 1+1/4" fiberglass ROD with a few
>> small pre-drilled holes ... it's designed to be used as an electric
>> fence post. The rod is VERY STRONG and should hold up quite well.
>>
>> The cost for a 6' rod is about $6 .... quite inexpensive. Cutting it
>> into 6+" lengths is quite easy.
>
> I used to use a lot of structural fiberglass in various forms. Whatever
> you cut or drill with will get dull very quickly when working with glass
> composites.. The glass is quite hard (harder than the steel in your
> cutting blades).
>
> If you have a diamond grit blade that works real well (like a tile saw).
> A carbide toothed blade works fairly well, too. An abrasive cutter
> also works, but is messy, melts the plastic matrix, and makes dust to
> boot (which as was pointed out, is nasty stuff).
>
> Don't contemplate taking a 6 foot rod and hacking it into 6"
> insulators.. the rod might be cheap, but the sharpening costs or new
> blades won't be.
>
> I haven't tried it, but cutting it with a shear, axe, or tree branch
> loppers might actually be a better strategy, since it would tend to
> "cleave" the glass fibers, and it's easier to sharpen the blade when it
> gets dull.
>
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