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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-11-10, 05:33 PM   #1
Aaron_F
A guy who rides bikes
Thread Starter
 
Aaron_F's Avatar
 
Join Date: Feb 2005
Location: Mid-Missouri
Bikes:
Posts: 459
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Want to start practicing with MAPP

I have some old steel frames to practice brazing with, and for now, I just want to get some experience with small braze-ons, such as seatpost clamps, bottle bosses, etc. My problem is, I'm totally confused about which flux and rod to buy.

I've read that silver rod burns at lower temps, and is easier to work with when it comes to tight spaces, plus it's harder to melt brass with a MAPP torch. So, I figure I'll go with silver, but I still have no idea which type to buy, or what flux to get with it.

There's just too much info everywhere to process at once, so help me out.
Aaron_F is offline   Reply With Quote
Old 08-11-10, 08:11 PM   #2
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,863
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
get some 56% silver cadmium free. Get Harris Safety-silv flux, the white stuff. If you're burning anything other than the MAPP, you're doing it wrong.
unterhausen is offline   Reply With Quote
Old 08-12-10, 03:08 PM   #3
Aaron_F
A guy who rides bikes
Thread Starter
 
Aaron_F's Avatar
 
Join Date: Feb 2005
Location: Mid-Missouri
Bikes:
Posts: 459
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks, I'll look into that.

Would this work, so I can just buy it locally? http://www.homedepot.com/webapp/wcs/...1&marketID=109
Aaron_F is offline   Reply With Quote
Old 08-12-10, 03:39 PM   #4
jmichaeldesign
Senior Member
 
Join Date: Sep 2007
Location: Colorado Springs, CO
Bikes:
Posts: 430
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm pretty sure that Home Depot doesn't stock that at their stores. Try to find a local welding shop. If they don't have it they can order it for you. My local Airgas stocks it.
jmichaeldesign is offline   Reply With Quote
Old 08-12-10, 03:41 PM   #5
erik c
Senior Member
 
Join Date: Feb 2010
Bikes:
Posts: 114
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Aaron_F View Post
Thanks, I'll look into that.

Would this work, so I can just buy it locally? http://www.homedepot.com/webapp/wcs/...1&marketID=109
yes
erik c is offline   Reply With Quote
Old 08-12-10, 05:53 PM   #6
ftwelder
Senior Member
 
ftwelder's Avatar
 
Join Date: Apr 2010
Location: vermont
Bikes: Many
Posts: 3,092
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by unterhausen View Post
get some 56% silver cadmium free. Get Harris Safety-silv flux, the white stuff. If you're burning anything other than the MAPP, you're doing it wrong.
You use Mapp for brazing?
ftwelder is offline   Reply With Quote
Old 08-12-10, 06:22 PM   #7
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,863
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I don't use MAPP except for plumbing. I tried using it for brazing once and it's horrible, but the OP is going to try it.
unterhausen is offline   Reply With Quote
Old 08-15-10, 02:48 PM   #8
clasher 
Senior Member
 
clasher's Avatar
 
Join Date: May 2009
Location: Kitchener, ON
Bikes:
Posts: 1,950
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 35 Post(s)
I like MAPP/oxy for cutting steel but it puts out a lot of heat, I imagine you could use it without an issue for brazing, assuming you have MAPP tips for the torch.
clasher is offline   Reply With Quote
Old 08-16-10, 09:40 AM   #9
erik c
Senior Member
 
Join Date: Feb 2010
Bikes:
Posts: 114
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think he's not planning on using an oxy/fuel process rather mapp gas in a type setup.
Attached Images
File Type: jpg MON3440..jpg (5.8 KB, 120 views)
erik c is offline   Reply With Quote
Old 08-16-10, 05:02 PM   #10
dogbitteneear
Senior Member
 
Join Date: Mar 2005
Location: MIAMI, OK
Bikes: TE CLONE AND TE CLONE WITH JACKSHAFT
Posts: 119
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Tried to use MAPP gas for my brazing job didn't make the grade.
dogbitteneear is offline   Reply With Quote
Old 08-16-10, 07:32 PM   #11
Aaron_F
A guy who rides bikes
Thread Starter
 
Aaron_F's Avatar
 
Join Date: Feb 2005
Location: Mid-Missouri
Bikes:
Posts: 459
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by erik c View Post
I think he's not planning on using an oxy/fuel process rather mapp gas in a type setup.
Yep, that's the plan.
Aaron_F is offline   Reply With Quote
Old 08-17-10, 09:00 AM   #12
bobbotron
Senior Member
 
Join Date: Dec 2005
Bikes:
Posts: 195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Post some of your practice brazes here if you try it!
bobbotron is offline   Reply With Quote
Old 08-17-10, 07:09 PM   #13
Aaron_F
A guy who rides bikes
Thread Starter
 
Aaron_F's Avatar
 
Join Date: Feb 2005
Location: Mid-Missouri
Bikes:
Posts: 459
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by bobbotron View Post
Post some of your practice brazes here if you try it!
They'll probably suck, but will do!
Aaron_F is offline   Reply With Quote
Old 08-19-10, 06:15 PM   #14
clasher 
Senior Member
 
clasher's Avatar
 
Join Date: May 2009
Location: Kitchener, ON
Bikes:
Posts: 1,950
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 35 Post(s)
I can't see how that will get things hot enough to work. Good on ya if it does though.
clasher is offline   Reply With Quote
Old 08-19-10, 08:37 PM   #15
tuz
Senior Member
 
Join Date: Dec 2006
Location: Toronto/Montréal
Bikes: Homemade mixte, track, commuter and road, Ryffranck road
Posts: 1,182
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Apparently some guys build entire frames with silver and an air-MAPP torch. That's what Talbot does in his book.

I used air-Mapp to build racks (w. brass) and other thingies. Haven't used it in a while nor touched a frame with it, but it was cool to get a feel for brazing. I'm sure it'll work fine for braze-ons and the silver you linked.

Besides the lower heat, the flame that comes out is quite big compared to an oxy-fuel flame. So joints may be a bit messy and building fillets is quite hard.
tuz 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 05:51 AM.