I don't know if this is too technical for the interwebs, but what sort of flame you're using for fillet brazing? I've had relative success with a soft flame and the sequence melt brass puddle, back away and let solidify, add on top, repeat going around... But my fillets are kinda small. Too strong a flame and the fillets melt away on the side, but even with the soft flame I can't stay long enough to build a large fillet...
Interestingly enough, I was experimenting with my flame on this joint. Started out with a smaller flame than I usually use and then got tired of it and went to a hotter neutral flame. The key is flicking the torch away at the right rate that the heat doesn't get away from you. It is a lot easier to manipulate the brass with a small flame, but the brass doesn't melt fast enough for me. But it should be possible to build as big a fillet as you want with a small flame; the problem I would have is getting it to melt smoothly. I didn't mention I am using 3/32" rod, so a little more heat is needed.
Originally Posted by
legalize_it
unter-
when im doing fillets to avoid the lip i like to check buy wiping away excess flux with my rod, then if i need to feather out the edges i hit em with the torch real quick just enough to wash it out a little.
That's what I do. I try to feather the edges as I'm going, but then when I'm done before I turn off the torch I go around the joint and look for problem areas. That's when it pays to have a fairly energetic flame. My goal is no sanding/polishing, but that hasn't happened yet.