New subject: Frozen seatpost - stem removal tips by Jobst Brandt

31 Aug 2008

      I have run into this a few times with aluminum seatposts/steel frames. 
I've tried the ammonium route before but found it much to stinky/messy 
and didn't get results. I have had success with a sheldon method of 
taking a longish hacksaw blade and cutting a vertical slit in the 
seatpost from the inside, stopping once you get near the frame. Then I 
grabbed onto it with a monkey wrench and it just sort of collapsed into 
itself as I twisted it. Very, very time intensive but effective. I've 
also heard the CO2 heating/cooling trick works as well.
-Andrew
FM Community Bicycle Workshop
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Today's Topics:

Re: Frozen seatpost - stem removal tips by Jobst	Brandt
(Rigel Christian)
Re: Frozen seatpost - stem removal tips by Jobst	Brandt
(Arlen Cooke)

Message: 1
Date: Sat, 30 Aug 2008 21:33:09 -0700
From: "Rigel Christian" rigelc@gmail.com
Subject: Re: [TheThinkTank] Frozen seatpost - stem removal tips by
   Jobst	Brandt
To: "The Think Tank" thethinktank@bikecollectives.org
Message-ID:
   d47aa47d0808302133h343be5bcm4f56b1b27876d95b@mail.gmail.com
Content-Type: text/plain; charset="iso-8859-1"
the people on the framebuilders list suggest two things when everything else
has failed:

ammonia
lye (red devil has been removed from the market because of meth hysteria,

but drano works - anything with sodium hydroxide as the primary ingredient)
these work for aluminum-seatpost-with-steel-frame only, AFAIK. the latter
will actually eat away at the seatpost itself (and produce probably-nasty
fumes). the former stinks really bad.
i have never tried either of these, but they seem reasonable from a chemical
standpoint.
On Sat, Aug 30, 2008 at 9:08 PM, Ethan elabowitz@gmail.com wrote:
...
For a seatpost (or any aluminum part that fits into a steel tube), I would
think one would prefer to cool down the offending aluminum seatpost rather
than heat the (painted steel) seat tube.
Cool seatpost = smaller seatpost, ya?
I hear this can be done with a CO2 cartridge, but I've never had to try it.
Ethan
Richmond, VA
--
http://bikebuilding.blogspot.com
On Sat, Aug 30, 2008 at 11:42 PM, joshua muir muirjoshua@gmail.comwrote:
...
I didn't see anything abut heat in there- I have had a fair bit of success
heatng stuck joints, and pulling stuck aluminum stems and seat posts.
just don't overheat (or use the auluminum parts again).
josh
On Sat, Aug 30, 2008 at 6:30 PM, dragonfly@mac.hush.com wrote:
...
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Kyle McKinley, I love that I can open an e-mail and read that
anyone is someone's "favorite living bicycle thinker".
Thank you for having a catagory of "bicycle thinkers" in your
head, for having favorites, and for having so many favorites that
they must be subcatagorized into "living" and, presumably, "dead"
'bicycle thinkers'.
Reading your post cheered me up and made me feel that the world
is a good place.
I think I'll go read Mr. Brandt on wheels right now. It just
became the most important thing on my to-do list.
Kudos to all Americans for your historic Presidential slate--
Obama-Biden, McKinney-Clemente, Nader-Gonzalez, even McCain-Palin,
despite the shudder that one gives me--has everyone seen the photos
of Barak Obama riding his bike around Chicago like a regular
commuter cyclist?
                              Sasha

On Sat, 30 Aug 2008 16:48:30 -0400 kyle mckinley
bicirider@gmail.com wrote:
...
Mr. Brandt is my favorite living bicycle thinker. His posting on
wheels
(fully catalogued on the web) make for incredibly interesting and
entertaining reading. Unlike most everyone else out there, Brandt
is a
engineer, with no links to the industry. He's exactly the kind of
grumpy old
codger that we need in this scene, and I've never known him to be
wrong.
Thanks for these reposts... His gruff responses make me laugh out
loud.
-kyle
On 8/6/08, Mark Rehder mark@re-cycles.ca wrote:
...
Speaking of Jobst, he has an FAQ on Sheldon's site:
http://www.sheldonbrown.com/brandt/index.html
Lots of good reading (and opinions) there.
Mark Rehder
http://re-cycles.ca
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Re: [TheThinkTank] Frozen seatpost - stem removal tips by Jobst Brandt