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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 06-02-11, 10:49 AM   #1
Cynikal
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JB Weld Strong Enough for Braze-ons?

I know it's a silly question but I'm looking to experiment. Would JB Weld be strong enough to hold a DT shifter boss and cable stop? I'm looking to put a DT shifter (indexed) on a head tube for an upright town bike. I know I could get it brazed on by one of our local framebuilders but I'm not 100% about how this would work and I'm just tinkering here.

Thoughts?
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Old 06-02-11, 12:22 PM   #2
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If you are just tinkering, see if you can use clamp-on shifter bosses instead to test function and adjust the position, then have bosses brazed-on later once you know where you want them. JB weld would probably be sufficiently strong for temporary testing but I doubt it would be a good long-term solution.
You dont necessarily need to find a skilled framebuilder for adding a few braze-ons. A local welding repair shop or a garage hack that knows how to braze could do this pretty easily.
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Old 06-02-11, 12:29 PM   #3
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If I could find a clamp-on boss for indexed shifters i would be happy enough. I've come up empty. Do they exist?
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Old 06-02-11, 01:42 PM   #4
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If I could find a clamp-on boss for indexed shifters i would be happy enough. I've come up empty. Do they exist?
Check ebay or ask on Classic & Vintage subforum. Know the diameter of your downtube.
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Old 06-02-11, 05:40 PM   #5
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JB weld isn't strong enuf to do that!
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Old 06-15-11, 03:16 PM   #6
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would jb weld be strong enough to hold guides for rear dyno lighting wiring...maybe two or three guides underneath DT?
4130 steel frame / powdercoat.
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Old 06-15-11, 04:54 PM   #7
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would jb weld be strong enough to hold guides for rear dyno lighting wiring...maybe two or three guides underneath DT?
4130 steel frame / powdercoat.
I think so, but your paint might not be.

Last edited by unterhausen; 06-15-11 at 07:34 PM.
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Old 06-15-11, 07:12 PM   #8
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http://www.rivbike.com/products/show...e-stops/51-020
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Old 06-16-11, 11:21 AM   #9
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I think so, but your paint might not be.
meaning?
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Old 06-16-11, 12:15 PM   #10
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powder coat doesn't have stupendous adhesion. It mainly stays on because it's tough. So if you yank on your wire, the powdercoat may fail.
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Old 06-16-11, 09:30 PM   #11
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gotcha.
guess I'll do this the right way...eventually.
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