[TowerTalk] Increasing the Inside diameter of a 1 inch outside diameter Alum pipe.

[Grant Saviers]

If it really is PIPE - NPS dimensions then there is no slip fit inside 
or outside that fits without machining one or both parts

If it is TUBING - exact inch size od (usually 0.125" steps in od) then 
the 1" wall thickness needs to be about 0.060 so the 7/8 0.875" od tube 
will fit inside.  Tube walls unless specifically sourced as telescoping 
will usually be in exact multiples of 0.125 - 1/8, 3/16, 1/4 etc.

Metric size tubes do not telescope.

Other wise a lathe and thicker wall materials are needed turned to size.

There are some very rare exceptions of tube/pipe fits in other than the 
standard schedule 40 pipe standard od and wall, since pipe comes in same 
od but different wall thickness from schedule 10 to 120 and beyond.

DXengineering sell telescopic tubing in 3 and 6ft lengths.  Plus it has 
to be drawn round, handled carefully, or it won't telescope.

Grant KZ1W

On 8/31/2022 00:40, John Birken wrote:
> I need to increase a beam section inside diameter about .06 inch.
> The outside diameter of this Al pipe is1 inch.
> Mosley was not receiving the element section for a few months.
> Amazon had the right Al inch pipe made by an antenna company.
> The new  6 foot long section needs to slide in 12 inches to the thinner
> section.
> The pipes won't slide together because the new pipes ID is a little too
> thick
> .
> Thanks for advice,
> John, K2SFS
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