Pete & Steve make good points about the seatpost. I think the final question would be, "Was the smaller wall thickness Garth described still above the design minimum wall thickness required for the seatpost to perform it's design function of supporting the seat and the rider?"
John Hawrylak Woodstown NJ
-----Original Message-----
From: classicrendezvous-bounces@bikelist.org
[mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of Pete Geurds
Sent: Saturday, March 26, 2005 12:10 PM
To: Classic Rendezvous
Subject: Re: [CR]Garth's seatpost
> Garth wrote:
> "The second fault was Campagnolo, who cast this particular seatpost
> unevenly. The width of the aluminum walls were so obviously uneven.
One
> part of the wall was nearly double the
> width of another part 360 degrees around, and the crack happened at
the
> thin part. This seatpost could never stand up to a strong twisting
action.
> If it had been >properly cast this post would be out now, in its
> entirety."
While the post may not be "defective" you can't call it their best piece of work. It would seem that the inner drilling being concentric with the outside diameter would be a given. If done on a lathe I'm not sure how you'd drill off-center unless it wasn't setup properly. Still if you get the post (or stem) out without ruining something else you've done good. Chalk it up to expeience. I love my Kroil for rusty stuff but it doesn't seem to help on stuck aluminum. Probably makes it worse since it no doubt hinders ammonia or Coke form reaching the oxidation. Been there, done that.
Pete Geurds
Douglassville, Pa