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Dry Ice
- RobertFrith
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Dry Ice
Postby RobertFrith » Fri Nov 16, 2012 1:16 am
I want to try dry ice down the seat tube to release a stuck seatpost in a vintage frame. Knowing I had some work in Welshpool this arvo I called BOC Gas & Gear Welshpool this morning to see if they sold it - yep, they sell it, just bring your esky or whatever -all good. Except when I got there at 2:30pm I get the blank stare aaannnd "nah mate, run out"
BOC are a real hike from both work and home for me, does anyone know where else I can buy dry ice? Sellers of dry ice apparently have insignificant to zero contact with the interwebs and google
Thanks, Rob
- WestcoastPete
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Re: Dry Ice
Postby WestcoastPete » Fri Nov 16, 2012 1:25 am
Sent from my GT-I9100 using Tapatalk 2
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Re: Dry Ice
Postby R12RT » Fri Nov 16, 2012 9:27 am
2010 Malvern Star Oppy C6
2014 Giant Propel Advanced 1
- RobertFrith
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Re: Dry Ice
Postby RobertFrith » Fri Nov 16, 2012 10:05 am
R12RT wrote:BOC Gas and Gear have other outlets at Malaga and Canning Vale.
Thanks, the BOC outlets are roughly equidistant from me - all of them represent a 40km round trip, long way to go if they've just run out. I'll either phone immediately prior to going or try this mob in Myaree who sell dry ice for blasting.
Edit; just called them, min quantity 10kg at $6/kg

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Re: Dry Ice
Postby cant_stop » Fri Nov 16, 2012 12:09 pm
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Re: Dry Ice
Postby RobertFrith » Fri Nov 16, 2012 2:28 pm
- Aushiker
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Re: Dry Ice
Postby Aushiker » Fri Nov 16, 2012 3:20 pm
Andrew
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Re: Dry Ice
Postby MyNameIsNoone » Fri Nov 16, 2012 5:03 pm
Second up I don't know if this works (good post so far!), but maybe try some of the wart/veruca removal stuff that you can get from the chemist. Not cream, but some remedies are an aerosol spray that you attach a sort of cotton bud to which you then press against the wart to freeze off.
I think this is some sort of liquid nitrogen solution or some kind of liquid/gas freezer. Maybe this might work on the bike?? Might be easier to apply too given it's designed to be applied to a small specific area.
Good luck
- BandedRail
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Re: Dry Ice
Postby BandedRail » Sat Nov 17, 2012 1:34 am
RobertFrith wrote:Edit; just called them, min quantity 10kg at $6/kg
Go this option - HUGE rave at your place later




Sorry, couldn't resist - I'll go away now
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Re: Dry Ice
Postby ghostpoet » Sat Nov 17, 2012 1:34 am
http://www.reece.com.au/plumbing/products/7620265
Let me know when you want to have a go and I'll drop it in. Just need to get some conducting paste...
- RobertFrith
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Re: Dry Ice
Postby RobertFrith » Sat Nov 17, 2012 9:47 am
BandedRail wrote:Go this option - HUGE rave at your place later![]()
![]()
![]()
now you're talking

ghostpoet wrote:Rob, what about this?
Looks cute, how does it work? I want to chill from the inside of the seatpost out.
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Re: Dry Ice
Postby orbeas » Sat Nov 17, 2012 10:52 am
RobertFrith wrote:R12RT wrote:BOC Gas and Gear have other outlets at Malaga and Canning Vale.
Thanks, the BOC outlets are roughly equidistant from me - all of them represent a 40km round trip, long way to go if they've just run out. I'll either phone immediately prior to going or try this mob in Myaree who sell dry ice for blasting.
Edit; just called them, min quantity 10kg at $6/kg
throw some beers in the left over dry ice, bingo cold beers on a hot day

Orbea Erandio Hybrid
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Re: Dry Ice
Postby Joeblake » Sat Nov 17, 2012 1:42 pm

May need to modify the nozzle to get a thick stream of gas rather than a cloud.
Joe
Bertrand Russell
- ColinOldnCranky
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Re: Dry Ice
Postby ColinOldnCranky » Sat Nov 17, 2012 7:10 pm
They did have limits on who and how much for a while after the Varanus explosion.

- RobertFrith
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Re: Dry Ice
Postby RobertFrith » Sun Nov 18, 2012 12:10 am
As of this writing the seatpost is still stuck

Thanks for the generous offers of help

- ColinOldnCranky
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Re: Dry Ice
Postby ColinOldnCranky » Sun Nov 18, 2012 10:05 am
RobertFrith wrote:Ended up going to Canning Vale this morning. It was very quiet, I reckon they were happy to have some company. Colin, I saw you just south of Leach Highway on my way home.
As of this writing the seatpost is still stuck![]()
Thanks for the generous offers of help
It was a clever idea though.
I don't know exactly how you attempted to do it but, logically, it would be necessary to chill the post relative to the frame. The post shrinks in and AWAY from the junction of the two. If you chilled from the outside (ie the frame) then you would not get that separation.
How about then trying to chill the post (apply the ice inside) while also applying some extra warmth to the frame (hot water?). Frame expands, post contracts, tendency to separate is increased. If that doesn't work then at the end of it you can always apply a little water to rapidly return things to a normal state of affairs and hope that the sudden shock may do something.
And if all else fails, try removing the seat and then sharply tapping the top of the post through a block of pine or deal.

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Re: Dry Ice
Postby GraemeL » Sun Nov 18, 2012 11:45 am
http://sheldonbrown.com/stuck-seatposts.html
http://www.parktool.com/blog/repair-hel ... -and-stems
What about heating it and then using iced water?
Graeme
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- RobertFrith
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Re: Dry Ice
Postby RobertFrith » Sun Nov 18, 2012 12:30 pm

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