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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 10-04-10, 11:21 AM   #1
shwb
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opinions on brazing quality please

Hi,

I've recently acquired a fillet brazed frame but I'm not convinced about the brazing around the back of the seat tube / bottom bracket. Also the seat stay bridge looks badly mitred to me (a non-expert). Any opinions on this? Photos link below.

http://picasaweb.google.co.uk/113140...eat=directlink

Last edited by shwb; 10-04-10 at 11:36 AM.
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Old 10-04-10, 02:46 PM   #2
mudboy
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Looks TIG'ed, not brazed. Looks like a not-bad-but-not-great made in Asia frame.
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Old 10-04-10, 03:25 PM   #3
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That is sorta like what an undercut weld looks like, except the concern is normally when it is a highly loaded part, the bead is small, and the undercutting indicated either cutting into the metal or that penetrations was not realized. In this case you sorta have an undercut like look in an excess attached puddle. I don't see a structural problem there. As far as the bridge is concerned I don't see any problem. Are you concerned it seems to be set into the stay? Looking at this on a netbook so I couldn't really see anything. Not a highly loaded part anyway.
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Old 10-04-10, 06:16 PM   #4
unterhausen
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the pictures of the bridge aren't really good enough for me to judge what is going on there. The brazing at the bb looks good except it wasn't cleaned up that well. There are no obvious issues with the brazing anywhere.
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