Originally Posted by
Mike Mills
I never got an answer to my question. Is MAPP gas hot enough to de-braze cantilevered brake lugs from a frame?
Not hot enough, you'll need oxy-acetylene, even if they are attached with silver.
Originally Posted by
Grand Bois
Using a torch on paper thin tubes that have been brazed or soldered together is asking for trouble. This isn't something I read on the internet. I speak from experience.
Hmmm, I worked at a frame shop for 8 years and we used a torch all the time. We did use silver to attach braze-ons except cable bridges, canti-studs, brake bridges and dropouts...Those Euro 531 frames you crave used brass for the braze-ons....Why do you think it's OK to heat up a tube to braze a lugged frame but not a braze-on?