[TowerTalk] Loosening Al tubing to Al Tubing

[Patrick Greenlee]

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
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