Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

Reply
 
Thread Tools Search this Thread
Old 03-12-14, 11:25 AM   #1
jawnn
Senior Member
Thread Starter
 
jawnn's Avatar
 
Join Date: Aug 2004
Bikes:
Posts: 387
Brazing w/ out lugs?

I need some tips about brazing with out lugs. Should I tack weld first?

I watched a welder do a bike, and he had a good step procedure to keep it from warping. see the red numbers:

And what is the name of the brazing material that is almost as strong as steel?


http://nhojyesdnil.files.wordpress.c...e-plan-999.jpg too bad I can not up load this picture!

Last edited by jawnn; 03-12-14 at 11:29 AM.
jawnn is offline   Reply With Quote
Old 03-12-14, 12:30 PM   #2
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,087
Fillet brazing is traditional, laying down a big smooth fillet that wont need a lot of clean up to look best
is a skill.
the fillet is where the strength is .. the brass filler in not unusual sourced.
fietsbob is offline   Reply With Quote
Old 03-12-14, 02:10 PM   #3
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 16,244
If you have fixturing to hold the tubes in place, tack welding is unnecessary. Standard, low-fuming bronze is just fine for fillet brazing.
JohnDThompson is offline   Reply With Quote
Old 03-14-14, 06:51 PM   #4
velonomad 
Older I get, Better I was
 
velonomad's Avatar
 
Join Date: Nov 2003
Location: Greenfield Lake, Wilmington NC
Bikes: '14 BD Lurch Fatbike, '10 custom road,'06 custom expedition, '94 Yokota Tandem, '88 custom MTB
Posts: 1,655
I built one filet brazed frame in 1988 and never built another. Too much aggravation for a hobbyist. That said I still ride that bike most everyday and it is my favorite hardtail MTB.
I didn't have a jig that would allow me to braze all around the tube, So I tacked it with some nickel-silver rod that melts at a higher temp than brass rod. Worked very well.
velonomad is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 07:44 AM.