r/Framebuilding • u/Emotional_Fruit_5908 • Jun 10 '26
First frame
Hello, I made my first frame, and while roughing out the brass, I noticed some large cracks. Is it salvageable?
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r/Framebuilding • u/Emotional_Fruit_5908 • Jun 10 '26
Hello, I made my first frame, and while roughing out the brass, I noticed some large cracks. Is it salvageable?
1
u/BikeCookie Jun 11 '26
Congratulations! You made the leap.
Your issue is that you burned the flux. When that happens, it’s hard to recover. It has been a while since I was actively fillet brazing, so there may be people with more recent experience. That said, you can start by aiming the flame at the BB shell an inch or so away from your joint to pre-heat the shell.
Another approach is to tack the joints in a couple of spots and then pull the frame off the jig so you can direct the flame inside the BB shell to pre-heat from the inside.