More Experienced Brazing Techniques

[Dave Kirk]

Thanks for all the input. Some of what you all said i have been doing however many times I get caught up in the brazing and forget to rotate one direction or the other.
I also put the frame back in the jig after finishing and reheat all the joints and this has helped quite a bit. Thanks again for all the info and I'd love to hear any more ideas someone may have.

This is something I would stop doing with your next bike.

Dave

[meech151]

Hey D. Kirk, just curious as to why this is a bad idea? My frames normally come out of the jig within 3mm of alignment and then cold setting is not that difficult.
I remember when I first started frame building I put my Scott CR1 on the alignment table just to see if it was perfect and the seat tube was 4mm off center at the top.

[Dave Kirk]

Hey D. Kirk, just curious as to why this is a bad idea? My frames normally come out of the jig within 3mm of alignment and then cold setting is not that difficult.
I remember when I first started frame building I put my Scott CR1 on the alignment table just to see if it was perfect and the seat tube was 4mm off center at the top.

Good Morning,

Two quick things before I head out on the snow for the day. 3 mm is a big number to me and I would really want that to be 1 mm or less. And the idea of locking a bike that is not straight into the jig and heating it so that the jig can then bend it into shape while hot seems risky to me.

I would work on getting it to come out of the jig very straight and then develop a brazing pattern that will not change the alignment.

I hope that helps,

dave

[Scheisserad61]

Meech 151 says : "I remember when I first started frame building I put my Scott CR1 on the alignment table just to see if it was perfect and the seat tube was 4mm off center at the top"

How sure are you that your alignment table is accurate ?

Putting a frame back in the jig and unnescessarily re-heating it, only to have it STILL be out of alignment when it cools down, is caveman framebuilding, at best.