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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 03-09-13, 04:40 PM   #1
e.din
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Pre-cleanup Fillet Brazed joints?

I've been trying to practice my fillet brazing recently with just some scrap .035 4130 tubing I picked up and have been having some issues. Really clumpy, not that smooth...but I also haven't taken the time to fully clean up a joint yet. Kinda weighing my time between "spend tons of time to clean up this ugly braze" and "just get better so I don't have to clean up as much later" and I always pick the latter. Still, it would be really helpful to see other peoples' post-braze pre-cleanup joints. Anyone have pictures to share?

Cheers,
Eric
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Old 03-09-13, 07:13 PM   #2
calstar 
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Heres a linki to unpainted frames by pro builders, look around and you'll see lots of finished fillets.

http://api.viglink.com/api/click?for...13628779064126

this would be a worthy goal for finished fillets IMO:

http://www.kirkframeworks.com/gallery3.html
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Old 03-09-13, 07:35 PM   #3
unterhausen
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it's probably worth cleaning a few up to see how hard it can be, but you are aiming to make it so that there isn't a lot of cleanup, and that requires practice brazing
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Old 04-04-13, 09:40 AM   #4
philsci
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This is the unfinished headtube of a frame I made at UBI in May. I think the fillets won't take too much to finish. If your fillets are lumpy, try a little more heat and make sure you're really getting the brass to wet out and the puddle is consistent.

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File Type: jpg 06. fillet detail.jpg (81.2 KB, 52 views)
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Old 04-04-13, 09:48 AM   #5
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philsci, looks good. I agree that should clean up pretty well. Be careful not to undercut the tubing. I don't think lumps are hard to clean up at all, it's really the valleys in between the lumps that are the problem. The thing that really drives me crazy during cleanup is the sharp edge at the tube. So hard to get rid of without cutting into the tube. This is my main goal to avoid when I am brazing.
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Old 04-04-13, 12:54 PM   #6
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Quote:
Originally Posted by philsci View Post
This is the unfinished headtube of a frame I made at UBI in May. I think the fillets won't take too much to finish. If your fillets are lumpy, try a little more heat and make sure you're really getting the brass to wet out and the puddle is consistent.
Pretty good fillets. Would clean up easy.
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