Dropouts chainstay water wash. Interesting thing happened see notes.
Water wash.
At first I thought, oh no!!! the dropout shifted in the chainstay...evidence is the ridge where I knifed the dropout. O.k. DONT PANIC, find out exactly what when wrong be prepared for major rework.
I do the knifing quite accurately so that I reduce (at least in concept) post Brazing filing to a minimum, so here it certainly looks like something shifted, which can be really bad.
Well actually, nothing shifted. Fits fixture as well as it did before Brazing. I compared the O.D. Of the end of the brazed chainstay to my yet unbrazed one. Looks like the chainstay tips basically changed shape or roundness with the application of heat, the two outside edges came closer together, sort of sucked in. Didn’t take a pic, but around a mm or two in total. Position of the brazed dropout is right where I want it. What a relief.
This hasn’t happened to me before, that I’ve noticed. I suspect the very short taper in these particular chainstays have a lot of built in stresses from the manufacturing process at Columbus and some of them were relived during Brazing.
It’s actually O.K. Just a bit of filing should look nice.
Dropouts chainstay water wash. Interesting thing happened see notes.
Water wash.
At first I thought, oh no!!! the dropout shifted in the chainstay...evidence is the ridge where I knifed the dropout. O.k. DONT PANIC, find out exactly what when wrong be prepared for major rework.
I do the knifing quite accurately so that I reduce (at least in concept) post Brazing filing to a minimum, so here it certainly looks like something shifted, which can be really bad.
Well actually, nothing shifted. Fits fixture as well as it did before Brazing. I compared the O.D. Of the end of the brazed chainstay to my yet unbrazed one. Looks like the chainstay tips basically changed shape or roundness with the application of heat, the two outside edges came closer together, sort of sucked in. Didn’t take a pic, but around a mm or two in total. Position of the brazed dropout is right where I want it. What a relief.
This hasn’t happened to me before, that I’ve noticed. I suspect the very short taper in these particular chainstays have a lot of built in stresses from the manufacturing process at Columbus and some of them were relived during Brazing.
It’s actually O.K. Just a bit of filing should look nice.