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Search: Posts Made By: JohnDThompson
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Forum: Framebuilders
10-21-14, 09:14 PM
Replies: 64
Views: 23,182
Posted By JohnDThompson

Yup. Particularly if you're going to be slinging...

Yup. Particularly if you're going to be slinging that thing around all day. Several years of full-time brazing at Trek was enough to convince me to use a Smith "Airline" torch for my own building.
Forum: Framebuilders
09-24-14, 01:33 PM
Replies: 64
Views: 23,182
Posted By JohnDThompson

At Trek, I used propane/oxygen and a big...

At Trek, I used propane/oxygen and a big "rosebud" tip for lugs. I could heat the joint and get it fully brazed before it knew what hit it, with lovely glass-clear flux (no burning) and no clean up...
Forum: Framebuilders
09-21-14, 10:20 AM
Replies: 64
Views: 23,182
Posted By JohnDThompson

I'd do it the other way around. Brass for the...

I'd do it the other way around. Brass for the lugs, unless you're sure of the precision of your mitering and tube fit in the lugs, since brass bridges gaps better than silver. Silver for the...
Forum: Framebuilders
09-20-14, 07:47 AM
Replies: 64
Views: 23,182
Posted By JohnDThompson

While it is possible to build a frame with a...

While it is possible to build a frame with a fuel/air setup, it paradoxically can result in much larger heat-affected areas on the tubes. With a good fuel/oxygen setup you can heat the work to the...
Forum: Framebuilders
09-17-14, 08:50 PM
Replies: 64
Views: 23,182
Posted By JohnDThompson

It sounds like you've already invested a fair...

It sounds like you've already invested a fair amount in this. My concern is your torch: MAPP/air is unlikely to be able to provide enough heat for anything beyond superficial braze-ons. You'll want a...
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