Re: [CR] lug thinning

(Example: Framebuilders:Chris Pauley)

Date: Wed, 05 Sep 2007 19:46:09 -0400
To: classicrendezvous@bikelist.org
From: "John Betmanis" <johnb@oxford.net>
Subject: Re: [CR] lug thinning
In-Reply-To: <C304B16F.EF69%fatticbicycles@qtm.net>


At 07:18 PM 05/09/2007 -0400, Doug Fattic wrote:
>My opinion is that
>thinning lugs is mostly about aesthetics and how to do it is mostly about
>what works best for the builder with the equipment he has.

It is also logical that thinning the lugs out towards the points would reduce stresses on the tubes at the transition.
>still recommend to my framebuilding students that they do most of their lug
>thinning after the frame is brazed. For one thing a lug can be held very
>stably as part of a frame and for another, I can control the precise angle I
>hold the file by comparing it to the tube.

If a long point lug were completely thinned before brazing, would there be any danger of the point warping and springing away from the tube during brazing? I kind of thought that would be one reason to file them after brazing.

John Betmanis
Woodstock, Ontario
Canada