[TowerTalk] Loosening Al tubing to Al Tubing

[StellarCAT]

generally I find its not only corrosion but metal bits from holes that 
weren't cleaned on the inside (how would one do that!?) ... THEY put the 
breaks on BIG time... the one I did manage to separate with lots of time and 
effort had scratches around the tubing from the fragments. If indeed that is 
the case, with corrosion acting as a dry agent (LOTS of friction) - its 
nearly impossible to separate them.

g.



-----Original Message----- 
From: Patrick Greenlee
Sent: Sunday, June 12, 2016 8:49 AM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Loosening Al tubing to Al Tubing

Put some ice  inside the smaller ID tube, cap the end and apply plenty
of heat to the outer tube while trying to dislodge it. If available, dry
ice is better.  Many Walmart stores used to sell it. The trick is to
heat the outer tube quickly after letting both be chilled by the ice.
If the workpiece will fit in the freezer chill it there before adding
the ice and heating the outer tube. The tubes are often hard to separate
due to some corrosion but that corrosion will partially insulate the
inner tube from the outer tube and helps keep the inner tube cool while
you are heating the outer tube to expand it.

Patrick        NJ5G


On 6/12/2016 7:29 AM, StellarCAT wrote:
> I have a few sections from a used yagi purchase that are like this - a few 
> of them I managed to get apart with lots of effort using a screw driver in 
> an existing hole and lots of pulling ... the rest just wouldn't budge. 
> Heating I don't believe works - its near impossible to heat them 
> independently - so they expand together... I tried WD-40, and the slippery 
> stuff - can't remember its name but for this purpose - nothing worked. 
> These pieces are now in my scrap pile replaced with new material from DXE.
>
> Gary
>
>
> -----Original Message----- From: Don W7WLL
> Sent: Saturday, June 11, 2016 7:31 PM
> To: Towertalk
> Subject: [TowerTalk] Loosening Al tubing to Al Tubing
>
> Want to restore a small inherited tribander for portable activity.
>
> Have a couple of tube to tube joints that are not coming apart with 
> ‘gentle persusian’. They been sitting in a coast air environment for a few 
> years (maybe 10).
>
> What recommendations here on TT of best solutions (s) to work into the 
> joints.
>
>
> Don W7WLL
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk