Go Back   RCCrawler Forums > RCCrawler General Tech > Tools, and Procedures
Loading

Notices

Like Tree1Likes
  • 1 Post By krillin

Thread: Another brazing thread

Reply
 
LinkBack Thread Tools Display Modes
Old 07-14-2018, 01:57 AM   #1
Newbie
 
Join Date: Jan 2018
Location: South Africa
Posts: 3
Default Another brazing thread

Hi Guys,

so after trolling a few forums, I have found some info here and there, but not all together.

So at the risk of being burnt, if anyone can assist with the below it would be great

If someone with the more knowledge, if you could answer a few simple questions would help

I would like to get into crawling, unfortunately my side of the world, we are very limited to what we have access to as the sport is not as big this side.

I am in the process of building a 3d printer for some parts that are unavailable, and keen to get into building tube chasis.

I've done the 3d printing thing before, and build many other devices, so not really my first rodeo in that sense.

Welding and brazing however, I have no clue whatsoever, so I need some assistance here.

So, from what I've gathered, you need a MAPP torch, some brazing rods, patience, and tubing.

A really noob question, why cant I use a butane torch, like a drememl versaflame/versatip? Does it not get hot enough? will the gass affect the solder? What temp do I need to braze at? is there a general guidline.

Tubing: I can get my hands on some brake line tubing, uncoated. Are there different types of tubing, or are they all the same metal? Apart from different sizes, is the actual metal the same?

Solder/brazing rods: Are there different types? so each melt at their own temps? ones that are stronger than others, ones that give a more rough finish etc? what would generally be the better one to use?

And then theres Flux, is flux flux, or are there differnt types of flux for different uses?

I have a general idea on the above, but I just want to get more peoples views on it if possible.

Cheers
K
krillin is offline   Reply With Quote
Sponsored Links
Old 07-14-2018, 05:56 AM   #2
Yashua
 
CREEPERBOB's Avatar
 
Join Date: Sep 2010
Location: Learn the parable of the fig tree
Posts: 3,619
Default Re: Another brazing thread

This place sells 3/16" OD DOM tubing, best stuff for your project
https://stockcarsteel.com/checkout/cart/
And yes, Mapp or oxy acetylene.
And you can buy brass brazing rod with flux inside.
CREEPERBOB is offline   Reply With Quote
Old 07-16-2018, 07:20 PM   #3
Rock Stacker
 
Join Date: Jan 2016
Location: NorthBay, Ca
Posts: 70
Default Re: Another brazing thread

I would go with oxy/acetylene. It is available everywhere and you can do much more with it than brazing. You'll need a mandrel-type bender so you don't kink the tubing when you make bends. Practice on cheap stuff, clothes hangers or whatever before you start brazing tubing. You need to develop a "touch". Go to the library and check out a welding/brazing book and study it. Go to the local welding supply store and ask questions. Oxy/acetylene rigs are available used. Look around at a flea market or swap meet or whatever you have in ZA.

Have Fun and Good Luck!
UncleJohn is offline   Reply With Quote
Old 07-18-2018, 02:09 PM   #4
Newbie
 
Join Date: Jan 2018
Location: South Africa
Posts: 3
Default Re: Another brazing thread

Noted, thanks
krillin is offline   Reply With Quote
Old 07-18-2018, 07:41 PM   #5
I wanna be Dave
 
BigSki's Avatar
 
Join Date: May 2008
Location: Baltimore
Posts: 4,392
Default Re: Another brazing thread

MAPP gas doesn't get hot enough by itself to do brazing, what you'll get is a solder joint. You can use a silver solder and get a decent strength joint. Oxy/Mapp or Oxy/actylene combo will melt silicon bronze filler rod to get a stronger "braze" joint. The main differences between a solder joint and a braze joint is how hot the flame is, which dictates what sort of filler rod it can melt.

If you have a local welding supply company, they can be very helpful to getting you setup with the right kinds of equipment and supplies. Don't forget brazing goggles, the UV light given off is bright enough to damage unprotected eyes.
BigSki is offline   Reply With Quote
Old 07-18-2018, 07:41 PM   #6
RCC Addict
 
Join Date: Jan 2012
Location: Clackamas
Posts: 1,668
Default Re: Another brazing thread

Here are some links I've bookmarked when I was researching about brazing.
Help with Brazing

Brazing torch suggestions

brazing question

Hope these will answer some of your questions.
hillbillyrc is offline   Reply With Quote
Old 07-22-2018, 12:28 PM   #7
Newbie
 
Join Date: Jan 2018
Location: South Africa
Posts: 3
Default Re: Another brazing thread

Quote:
Originally Posted by hillbillyrc View Post
Here are some links I've bookmarked when I was researching about brazing.
Help with Brazing

Brazing torch suggestions

brazing question

Hope these will answer some of your questions.
Thanks 👌🏽
hillbillyrc likes this.
krillin is offline   Reply With Quote
Old 07-23-2018, 06:18 PM   #8
I wanna be Dave
 
Mike Flea's Avatar
 
Join Date: Apr 2013
Location: Streamwood, IL
Posts: 2,047
Default Re: Another brazing thread

Quote:
Originally Posted by BigSki View Post
MAPP gas doesn't get hot enough by itself to do brazing, what you'll get is a solder joint. You can use a silver solder and get a decent strength joint. Oxy/Mapp or Oxy/actylene combo will melt silicon bronze filler rod to get a stronger "braze" joint. The main differences between a solder joint and a braze joint is how hot the flame is, which dictates what sort of filler rod it can melt.

If you have a local welding supply company, they can be very helpful to getting you setup with the right kinds of equipment and supplies. Don't forget brazing goggles, the UV light given off is bright enough to damage unprotected eyes.
I disagree. MAPP gas does well with silver solder and flux with tubing. I made my 1/6 Jeep cage with MAPP gas, Silver rod, Safety-Silv Flux, and steel brake line.

I've used brass filler rod and a Propane torch to braze coat hanger together for craft projects for my wife.

As long as you fishmouth the joints, & apply flux to the mating surfaces, the silver, or brass will flow into the joint, and in my opinion, the rod works better than a coil.


I do agree that you should find a reputable welding supply to help you decide which to use. Airgas has stores all over: Airgas | Home Page, click on "Find a Branch" to find a store near you...and no, I don't work for them, but I do have one near me that answers my questions.
Mike Flea is offline   Reply With Quote
Reply



Another brazing thread - Similar Threads
Thread Thread Starter Forum Replies Last Post
Brazing help kurt2938 Tools, and Procedures 2 11-20-2013 04:29 PM
Brazing bigdodge88 General Crawlers 6 07-22-2008 10:31 PM
brazing martinsimmons Tools, and Procedures 11 03-12-2007 06:14 AM
brazing thread aint scared Chit Chat 2 01-03-2007 11:39 AM
Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 12:48 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com