I love the old school videos showing field or emergency repairs with limited tools. I would like to see videos showing use of carbon torches (both welding and cutting) and brazing of aluminum. I have heard that you can weld aluminum with them using the right flux. Cheers and thanks.
i'm watching this for my welding class and his voice and the crackling of the torch is just, so, soothing, to the point where its hard not falling asleep.
As an A/C guy, I also enjoy brazing. This is not quite the same, as my brazing is non-ferrous, but that’s exactly why I’m here. I love your instructional videos! Thanks
I learned to braze almost 50 years ago and it is still a great way to repair broken cast iron..The problems people encounter usually stem from not cleaning properly, too much heat, not enough flux, etc.... Cheers; Mike in Louisiana
Glad you still stress the basics which gas welding teaches. I'm almost sixty and my first welding class in high school was gas welding and I'm thankful I learned, it made learning all other welding process easier. I also still do repairs and some artistic projects with brazing and soldering, I find it calming.
I'm not quite as old as you, but I'm up there. The first welding process I learned was MIG, followed by TIG. The reason for that is that my father was a certified aircraft welder for the Air Force, and we had MIG and TIG equipment in the garage when I was a kid. He taught me gas welding later as a teenager, and I learned stick welding on my own with the help of a welding textbook. I eventually became certified for different processes and specifications myself even though I never really worked much in the trade. This was back in the day when any college or vocational welding course still started with gas welding, and wouldn't let you touch any electric welding equipment until you had passed your gas welding course. While my situation was unusual, I am still of the opinion that a person should learn fundamental welding first using oxyacetylene. Compared to electric welding processes, OA is unparalleled for learning puddle and heat control and rod manipulation. It's also the most versatile process, since you can weld, braze, braze weld, solder (overkill, but it does the job) and heat metal for shaping or forging, and with the cutting attachment you can cut, gouge, bevel, etc. Even if you never weld with gas, no metal shop or hobbyist is complete without an OA outfit AND the skill to use it properly. Of course, if you do have it, you should occasionally forego the MIG, TIG, or stick on a non-appearance-critical steel weldment and use the OA, just to stay in practice. If you stay proficient it will look good and be as strong as the parent metal, and you will actually enjoy the process and won't get an arc tan :)
agreed. I'm 48 in a couple of months. Learned weld as a kid pre-teen from Dad. Went on to be a welder/fabricator in the Army..years later 2012 to be exact . For chits and giggles decided to take a college course in welding from the Local community college. Imagine my surprise looked, when the 27 year old instructor informed me the first day of class. The only OxyAcy we use is a cutting torch. I do not teach gas welding of that type. No one uses it anymore. Later I was informed he was actually a machinist who lucked into the role of teacher. After that I informed the class one day of what they were being screwed on and I would spend time with them after class showing them the real basics of welding. I've asked the college why they allowed this..they never reply..Just saddens me. Promote this kids to exceed in welding.. yet they are taught very little. And the college wonders why they are not hired.
i had a similar exp's when it took a welding program in college,,the teacher (a scotish chap who worked for rolls royce jet engine mfg) told me they wont teach gas welding no more despite there being a few rigs in the class he said it was used by some guys in refrigeration or some other class and that teacher would be pissed if gas was low in the tanks,so i learned mig and stick first then tig where we moved from ms to ss but the sob teacher would not let me work on SS (or was it al?)because it was too costly and he was worried about having the school waste money buying more of it and affecting his class budget or whatever ,so instead he tried to cheat us with steel saying it was the same ,no one else noticed or asked despite us paying for a tig course in that specific material,so i went to the dept and complained and the very next day he gave me the material ,i think he knew i was the one who must have complained lol but seriously they only teach you safety,some basics on electricity with the machines and how to run the machines and basics in welding techniques and its mostly you on your own hands on ,no metallurgy science or nothing like the old days ,all that stuff you need to pick up on your own
Welding with a torch first is the best way because as I have seen it makes you more aware of heat transfer and what it takes to heat up metals. Most of the places I have worked and most of the knucklehead welders I have worked with don't seem to pay any attention to heating of metal or heat flow or anything. They think just strike an arc on an ice cold heavy block of metal and everything will be fine. Or lay down a nice fast cold MIG weld that you can peel up with a chisel.
Bob, you made that braze look simple and clean. I think that if I practice about 47 bazillion hours, I might come close. Thanks for your excellent videos!
It doesn't take long to learn, but when you practice be CONSISTENT and practice the same joint until you're proficient, then perform other joints. Spend say an hour between breaks so you can work without interruption.
I learned brazing in High School, took me about a week to get good at it, maybe 5-6 hours total. If you've done regular oxy-acetylene welding, this is about like that but with less melting the steel.
AHH the great smell of brazing ,The oxy acetylene process/ brazing was the first welding process I learned in vo tech. Many people dont realize the incredible strength of brazing I remember brazing broken gear teeth that saved thousands of dollars. To replace the gear was over $2700 dollars and to repair it was about $20.... great job.
Yup. It's still the only process commonly used on saw blades. Have you see what a well made saw blade costs? Check out Forrest blades, they're the best made in America blades you can get and you pay for it, too! I was surprised to see even the diablo blade I bought from Freud for my sawzall even has brazed carbide teeth on it. She's an absolute beast with that blade on it!
@@jamesavery6671 50,000psi typical, up to 65,000psi for a good braze weld with low fuming bronze. Silicon bronze and the aluminum bronzes are even stronger, but less ductile and shock resistant.
@ARCTURUS "...The oxy acetylene process/ brazing was the first welding process I learned in vo tech...." Same with my son. He did some very nice braze welds, as well as steel. When he got around to TIG welding, it was a cinch.
this guy is a great teacher. one detail for those who are interested - it is not capillary action that joins the surfaces, they join as a result of molecular interaction of the liquid metal with the solid metal, caused by wetting.
Thanks for doing this video Bob. Haven't brazed in about a thousand years but can remember using it on a lot of things in the past and recall admiring how surprised I was at the strength of the bond. I hope the students attending your class realize how lucky they are to have someone like you teaching them.
Oxy acetylene, or gas welding and brazing is great! I learned it first along with cutting. Then I learned using propane. It is still my failsafe go to. I will never forget the comments the first time someone watched me literally weld a copper heat exchanger with gas. I use a lot of high tech today but still love old school gas. Keep your great videos comming! You are doing the trade a great service by being a excellent teacher!
What is the difference with Propane? What pressures do you use for oxygen and propane, do you use the tip of the cone? Do you get more blackening of the tubes? Love the answers to those questions please.
Genuinely love your guy's videos, old and new. Your use and expertise of not only the welding methods and knowledge but also the camera footage you provide makes it so much easier for me to learn how to do these processes myself. Thank you!
Very enjoyable seeing little used techniques. I was taught at General Motors Fisher Body in NJ in 69 oxy acetylene wire weld and lead joints and using weld wire to make rivets on metal to join panels . I miss it and really enjoy seeing a welder doing his craft well. I am always telling young kids there is so much out there And it pays well and you have a nice product when you are done . Such a Blessing !Thanks you for providing Good resource.
Thank you for showing us all how to make brazing happen. This was taught when I was in school metal shop. Some of the fondest time spent in shop class. Today they do not even have shop classes or even music class so i am told. Nicely done fella too.
So happy to see and hear someone still teaching base welding tech. Gas [oxy-act] along with brazing. Low Fuming Bronze brazing is what I learned first back in '75. Glad I rolled into your channel.
I took a welding class in adult education and loved it. Our class was divided in half...one side learned stick and Mig...the other oxyacetylene and stick. Unfortunately, I didn’t get the opportunity to learn the oxyacetylene because we ran out of time. I’m thinking of just going and buying a set and teach myself. Your vids help immensely!
Bob. Thanks for this. Thanks for what you do here and how you teach. Your teaching style is nicely refined. Your knowledge and talent being shared is greatly appreciated by me and by many I'm sure. This 60yo firefighter is learning a bunch from you. I have a 1200 sq ft "man shed" that has just gained a budget arc welder. With your assistance, I am teaching myself how to weld and work with metal. Something I've always been interested in but never had the funds nor time to pursue. Now? Bring it on, buddy. I'm ready.
I truly dig this tutorial, it shows or teaches so much in such short time, the distance of the tip not being constant was the biggest tip I learned. I also watch your videos more than others because being left handed, I can mimic/ follow your movements easier. overall, everything makes more sense. thank you.
It seems that if you'd have put higher heat into it, you would get partial drips on the other side. I appreciate the tight camera shots showing the technique.
Perhaps. Honestly I'm only familiar with copper and silver rods used for HVAC brazing. The rods he,s using seems to be almost 40% zinc. Its practically brass. It looks much less fluid than the silver rods used for brazing copper HVAC pipes.
My father in law restored his 1957 by brazing all the replacement panels in. We worked on an old 68 Chevelle we pulled out of the weeds and we started to strip the body. The quarter was replaced and at some point in the past, once we got down to the seam...by George it was brazed! Very very strong!
Thank you for taking the time and effort to make an educative video in which we can learn the science behind “welding”. You show that it’s not just what you learned watching others weld but the fact that there is a science behind all. Thank you.
So good to see these videos, Bob! I learned these things in high-school and by teaching myself, and now that I'm retired, I'm picking them back up to keep busy, and fix things for family members. Thanks again!
This is a really good skill to have under your belt as a welder. This was one of the first things I learned as a young kid with a full set of bottles and a butt load of time. I learned a skill and kept out of trouble at the same time. Idle hands being the devils workshop. Thanks for the look back.
You are a wonderful teacher sir. Thank you! Do you always hold the torch in the left hand and manipulate the rod with your right? I’m right handed and feel more comfortable with the torch in my right and the rod in my left, but I’m not the greatest, so I was curious as to whether or not I’m selling myself short. Thank you again.
Very nice presentation! Excellent video recording! This takes me back about 40 years to auto body school and as you stated the progression of torch first and then wire welding MIG. I later in life learned silver brazing with 15% and 45% silver depending on the application. I cannot thank my junior year teacher for teaching us the techniques! (Never learned to TIG but assuming at 55 the need to learn is pretty low)
Learned braze welding in navy weld school years ago. We were taught a different technique that that leaves the bond looking like a really nice weld bead. I see that you pull the flame outward. What we were taught was more similar to SMAW with say a 6011 rod. The filler rod and the flame move back and forward together like a dance. We'd move the flame back (not out), bring the rod in and "dip," then move the flame and puddle forward. The rod always remaining in the flame envelop as well. A very intimate dance. In this way, the flame envelope seems to better prevent contamination and I found that it allows you to control the process better and without as much manipulation. It also seems faster to me. Like 6011, one might maneuver a bit side to side to wet in stubborn edge point, but generally a back and forth motion. We also got to do this in the over head position on . . . ahhhh! Cool video. Thanks
Amazing video. I watched a few videos earlier and they just didn't get quite in depth. And explain things like pressure or thickness of wire and such. THANK YOU!!!
That is how I learned. Bare P bronze with AntiBorax flux. Victor 100. The phosphor bronze rod is eutectic so once it reaches melting point, it flows like water. Also used food grade silver bearing for stainless matching. Still have that flux in my tool box.
I've just got into brazing. I am trying to braze some steel legs for a bench but the steel always gets covered in a black soot from the torch. Could anyone tell me what I'm doing wrong? Great video very helpful 👍
Brazing has a lot of haters in people who don't even know much about it. It's my go to. I've found it easy to learn, less distractions with no metal popping all over and just generally cleaner and less stressful to begin with. A lot of it is almost as strong and best of all it never rusts!
What you are demonstrating is "Bronzewelding" Brazing involves a different joint design (lap/socket ) joint and a different composition filler metal (nearer the Eutectic).
How strong is brass brazing? For example what would you use this application for? I imagine not any heavy duty structural applications but I would love to know what brass brazing would apply to. Thanks for the knowledge friend. I appreciate you sharing.
If I can do silver soldering, I should be able to braze? I have a lawn mower deck I need to repair, can I patch holes and braze them? I really like the way you explain things. Calm, collected, very sure of yourself, got my attention early and kept it. Thanks for showing & sharing
Good video. Here is one little tip for you. This works especially for lighter gage materials say 14 gage or 12 gage. Should work on any thickness though when brazing. To control the width of a brazing bead try using a No.2 pencil and mark out lines say 3/8" wide and run a bead inside the lines. The brazing material won't cross the pencil lead. Don't ask me why lol. An old timer taught me that 30 years ago. Helps make a nice straight bead. Try it out and let me know what you think. It should work for you.
very cool video~ just did some brazing to make a condensate pan at work for hvac job. While working at a body shop years ago seen the foreman do some brazing on a wrecked truck and I was amazed at how it looked just like a row of dimes from a tig weld . I have tried over and over but could never get that look of the row of dimes
I do silver solder for a living. I work with stainless,copper,brass.....sometimes all in the same part! I often wondered what more i could do with this skill? Doing something neat like this looks like a lot of fun!
2nd best channel to learn anything related to welding brazing soldering. Your students are lucky to have such a great teacher with a wealth of knowledge. Who is 1st.................😃
So glad I bumbled upon this channel. I have been thinking of learning to do some basic welding, just hobby, decorative stuff. I have found good welders to be more $$$ than I can put out at this time. Brazing will do great to meet my needs. Thank you so much.
thanks i learned oxy acetylene in high school ,long ago,now im a beekeeper and want to braze copper to make a oxalic acid vaporizor for mite treating hives,solder too low melting,so im going to try oxy / map little brazing kit,i like your explanations,soon im going to harbor freight for a tig set up, to compliment my mig,ill be following...
Hey Bob, Great video you have here. I realize it is a couple years old, but I just stumbled across it. I am a "amateur" welder. I have a small stick welder and a small MIG welder just for small jobs around the farm/homestead. I wanted to ask you "how strong is the brazing as opposed to say a 70,000 psi welding rod?" I have never tried brazing, but could see it as a very useful tool in certain applications. Thanks, RR
Great video. Really interesting to see some brazing being done. You did a great job of filming the molten puddle, very clear. It really helped in seeing what was going on. Thanks!
Great Video. Shows how its done. Did a lot of Brazing in the late 60s, early 70s and then got away from it. It is like Tig and it looks so Pretty when your done.
Some people watch basketball, baseball or football, but I could watch this stuff for hours. I might be building a Legal Eagle XL and brazing is the main method for connecting all the frame pieces together.
I have a table made out of 1" Sq tubing and it is all covered in brass made by the best weldor I ever met his work was amazing wish I had met him sooner
I worked for a gentleman that loved using a torch. he was amazing with it. so of course I was excited and not disappointed in this video. if you get a chance check his company out. it's TM technologies. I no longer work there but still love the idea of using the torch. it is amazing what you can do with a torch that most people don't know you can do. Love your video's. Maybe I'm a dork but I always look forward to what comes out
I live in the rust belt so brazing is a very valuable skill to have. Could you guys do some cladding oxy/fuel videos using filler metals with melting temps much higher than the base metal. This comes in handy for valve seats. Stoody makes some nice bare wire for that sort of thing.
I'm loving the videos! I have a jeep Wrangler with a ton of rust. Frame is a normal 1/8" thick but the body rails are thinner and the floor pans are like 19 gauge metal. Will this product work on thinner metal? Or is there a more sufficient product to use for thinner metal? I've brazed and soldered copper my whole life, so I'm more comfortable with a torche.
I'm curious... Why would you braze and not weld? I just completed a basic welding class and brazing was not covered. We did oxyfuel cutting and welding, stick and MIG.
John McDermott well, to answer your question. you may find yourself in a situation that requires the joining of steel to brass or copper, something like that. I. which case welding is impossible, thus brazing becomes necessary to complete the task at hand.
Cool technique. I've always wondered about using dissimilar metals for projects like this. Do you find that brazing like this will subject the piece to electrolytic degradation? Also, I assume the brazed joint is somewhat less structurally sound than a similar welded joint? Thanks for uploading this.
What are the advantages of brazing over tig or mig? is the weld more flexible for high stress joints? why would i choose brazing over another type of welding?
There are different advantages for different applications, but probably the widest reason it's considered is because of its lower melting temperature for heat sensitive materials.
Great video,my question is,I have a gas tank off of a motor cycle that has a small crack in the seam.Is it possible to Braze it,using LP and make a good repair?I think the metal isn't very thick and a welder would burn it.The tank has been empty for several months now and aired out in preparation for the try,don't want it to blow up on me.What do you think and,or would you do or advise for me to do.Thanks.
brazing is easy if you got the technique down. although i struggle with it i still lay down pretty good welds for a beginner at brazing. love the video you should do brazing on t-joint.
Great videos as always. Bob, rather than oxy acetylene I want to use a oxy propane setup for heating brazing and occasional cutting. Are there any notable cons to this alternative method and do I need different hoses with an oxy propane setup or can I use my existing oxy acetylene hoses. I do have an oxy propane torch?
Thanks for the information. I "learned" how to gas weld back in high school, as you said, before we went to stick and wire feed welding. However, 30 years later I find myself in a situation were gas welding is preferential for my job. What is the strength difference of brazing, and gas welding, and stick welding? Thanks again.
Thanks for this. There are some of us who can't weld anymore because the welders can interfere with implanted pacemakers and defibulators. Yep, that's a thing.
That was great insight, thanks fir your time. I really enjoy watching your videos. Unfortunately I don't have time to go to a school to learn the proper way so I need to rely on these RUclips videos and I'm glade I came across this channel. Thanks again. When my kids are big enough they will learn welding at a school prior to any college.
I learned ocyact welding on my own in my Dads garage on customers vehicles usually on exhaust systems. I eventually was able to patch a hole on rusty tailpipe with baling wire. On a hole the size of a quarter I would tack a piece of wire on one side then the other then lay one next to that one. The next thing would be to weave the two together. You had to get in and out just like you demonstrated. Rinse and repeat until the hole was plugged. In later years a guy told me if I could do that, I could weld anything. Perhaps. I am 68 and find myself still trying to be the welder my dad was. Your videos might actually get me there. A problem that I have is with my Hobert beta mig setting the voltage and wire speed is not nearly as accurate as your machines.
Believe it or not I learned about brazing in jr high shop class in the mid 80s. I don't know how many districts offer that sort of thing, but it seems rare nowadays. I didn't pick it up again until about 9-10 years ago when I got a hold of a torch rig as payment for moving my mother in law out of her house. (It was her late hubby's so she didn't need it) I have found brazing to be very useful in repairs and fabrication in my garage workshop. I've used it to repair a cast iron well pump and my shop vise. The pump repair outlasted the motor on the pump.😄 I also use it to join thin walled tubing when trying to weld it would just burn holes through it.
I came here to learn a brazing technique so I can braze a piece of rebar to the bottom of my firepit cooking grate. It is 36" in diameter and has no support under. I'm worried about it sagging over time with weight of food on it and the heat. That being said, I think I'll only need to spot braze the end of the rebar to the outside of the grate and maybe spot braze 3 or 4 places in between. I have a propane / mapp torch that I think will work, which would you recommend? Also, as far as eye protection is concerned, would you think it necessary to get specialty dark glasses, or would my polarized sunglasses work, since this is a very small project? Thanks.
I have finally got of my ass to learn what the definition of “brazing “ actually is and was oh so fortunate to find your video. I know nothing about welding and am developing an interest to pursue it. You sir, are an excellent instructor. Wish I was in your area (wherever that is ) so that I could take a class from you. Excellent, comprehensive video. Thanks so much.
I like what you said, "When do we see braising projects? Never." I need to cut some 1/4 inch copper hose out of a proprietary brass fitting, and braise it to a normal propane fitting, and be assured it doesn't leak. I am now searching your videos.
2 questions Is brazing as strong as other welding processes? Is there anything you personally can't, don't, or won't weld? I asked in this manner because everyone has something that they just don't prefer to do. Thank you for this great video. I've been wanting to see some brazing techniques.
Ben Lee brazing doesn't melt the parent material, your essentially melting the filler and joining the two pieces of metal with it. Brazing can be immensely strong, however it isn't as strong as welding. It does have the ability to join materials that are incompatible to weld. If you were to weld stainless to aluminum, the weld would crack/junk. However you could braze it.
Bob Moffatt that's definitely a project that should be done by the person trying to pass it off. I remember hearing about a fatal osha investigation where a guy tried to weld on a empty drum that previously held acetone. Supposedly it was cleaned/rinsed. The guy was welding on some casters and either blew through the drum or it got hot enough to ignite. There was enough remaining acetone that it blew up and threw the man a few feet away. Definitely not worth the risk.
I am attempting to repair a small leak in a copper heat exchanger for a marine Diesel engine. I am using phoscopper rod. This the first time in 15 years I have lighted a torch, so have much to remember. After the first attempt, there is a very small drip from a location that I can’t isolate. At 60 psi, a tsp of water with dissolved flux leaks out in a couple hours. The weld surface of full of pocks so I must have applied to much heat and or let the flame drift to oxidizing. Should I grind the weld back and do second run with smaller tip, or is there a better way forward?
I use to deliver 1000 newspapers when i was 13 used to have 3 big bags hanging off me with multiple trips back home for refills my dad introduced me to the world of fabrication and we made a trailer all brazed together to go behind my bike to carry all my papers it was awesome!!
1000 hunh? You would have needed that trailer. I delivered 350 on Sunday and when offered it had to turn down my 4th route because my dad didn't weld/braze. I'm forever designing things in my head, some make it to paper and even fewer to real life. I'd love to build a long electric trailer. Got some 20 bmx wheels & a black rooftop suv carrier made by Porsche. Not sure what motor/s to use. Would like to have it push me and camp out of it.
Building a cab for my tractor, my mig seems to be screwing up. I am a plumber/pipefitter and i do have medical gas braze certs but was wondering if i can bronze braze this square tube frame but im wondering about annealing the steel too much and losing the rigidity of it. I know when i braze copper the end result is a very strong joint but the surrounding tube is very soft now
I would like to try this technique, could I join stainless steel or silver plated cutlery this way using propane ? what type of rod would I need ? I don't own a welding machine.
This was great, what kind of applications would be best to braze over weld? I would be interested in details and a demonstration of soldering. Thanks very much
I need to join a 3/8" thick exhaust flange to 2.25" tubing. The tubing is very thin compared to how thick the flange is. Both are stainless steel. I knew an exhaust fabricator who preferred brazing because it was easy to make a perfect air tight seal. I don't have a TIG machine. The other end of the pipe will fit into a resonator with and overlap fitting. The tubing is 409 stainless and the resonator is 304. What type of flux and brazing rods do I need?
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I love the old school videos showing field or emergency repairs with limited tools. I would like to see videos showing use of carbon torches (both welding and cutting) and brazing of aluminum. I have heard that you can weld aluminum with them using the right flux. Cheers and thanks.
Just to clarify (I am not sure on the terms), when I say carbon welding, I meant using a twin carbon arc torch.
Which videos? please post a link as I see alot of this stuff in old PM magizines. Thanks.
i'm watching this for my welding class and his voice and the crackling of the torch is just, so, soothing, to the point where its hard not falling asleep.
As an A/C guy, I also enjoy brazing. This is not quite the same, as my brazing is non-ferrous, but that’s exactly why I’m here. I love your instructional videos! Thanks
I learned to braze almost 50 years ago and it is still a great way to repair broken cast iron..The problems people encounter usually stem from not cleaning properly, too much heat, not enough flux, etc.... Cheers; Mike in Louisiana
Glad you still stress the basics which gas welding teaches. I'm almost sixty and my first welding class in high school was gas welding and I'm thankful I learned, it made learning all other welding process easier. I also still do repairs and some artistic projects with brazing and soldering, I find it calming.
I'm not quite as old as you, but I'm up there. The first welding process I learned was MIG, followed by TIG. The reason for that is that my father was a certified aircraft welder for the Air Force, and we had MIG and TIG equipment in the garage when I was a kid. He taught me gas welding later as a teenager, and I learned stick welding on my own with the help of a welding textbook. I eventually became certified for different processes and specifications myself even though I never really worked much in the trade. This was back in the day when any college or vocational welding course still started with gas welding, and wouldn't let you touch any electric welding equipment until you had passed your gas welding course.
While my situation was unusual, I am still of the opinion that a person should learn fundamental welding first using oxyacetylene. Compared to electric welding processes, OA is unparalleled for learning puddle and heat control and rod manipulation. It's also the most versatile process, since you can weld, braze, braze weld, solder (overkill, but it does the job) and heat metal for shaping or forging, and with the cutting attachment you can cut, gouge, bevel, etc. Even if you never weld with gas, no metal shop or hobbyist is complete without an OA outfit AND the skill to use it properly.
Of course, if you do have it, you should occasionally forego the MIG, TIG, or stick on a non-appearance-critical steel weldment and use the OA, just to stay in practice. If you stay proficient it will look good and be as strong as the parent metal, and you will actually enjoy the process and won't get an arc tan :)
agreed. I'm 48 in a couple of months. Learned weld as a kid pre-teen from Dad. Went on to be a welder/fabricator in the Army..years later 2012 to be exact . For chits and giggles decided to take a college course in welding from the Local community college. Imagine my surprise looked, when the 27 year old instructor informed me the first day of class. The only OxyAcy we use is a cutting torch. I do not teach gas welding of that type. No one uses it anymore. Later I was informed he was actually a machinist who lucked into the role of teacher. After that I informed the class one day of what they were being screwed on and I would spend time with them after class showing them the real basics of welding. I've asked the college why they allowed this..they never reply..Just saddens me. Promote this kids to exceed in welding.. yet they are taught very little. And the college wonders why they are not hired.
i had a similar exp's when it took a welding program in college,,the teacher (a scotish chap who worked for rolls royce jet engine mfg) told me they wont teach gas welding no more despite there being a few rigs in the class he said it was used by some guys in refrigeration or some other class and that teacher would be pissed if gas was low in the tanks,so i learned mig and stick first then tig where we moved from ms to ss but the sob teacher would not let me work on SS (or was it al?)because it was too costly and he was worried about having the school waste money buying more of it and affecting his class budget or whatever ,so instead he tried to cheat us with steel saying it was the same ,no one else noticed or asked despite us paying for a tig course in that specific material,so i went to the dept and complained and the very next day he gave me the material ,i think he knew i was the one who must have complained lol but seriously they only teach you safety,some basics on electricity with the machines and how to run the machines and basics in welding techniques and its mostly you on your own hands on ,no metallurgy science or nothing like the old days ,all that stuff you need to pick up on your own
Welding with a torch first is the best way because as I have seen it makes you more aware of heat transfer and what it takes to heat up metals.
Most of the places I have worked and most of the knucklehead welders I have worked with don't seem to pay any attention to heating of metal or heat flow or anything. They think just strike an arc on an ice cold heavy block of metal and everything will be fine.
Or lay down a nice fast cold MIG weld that you can peel up with a chisel.
Bob, you made that braze look simple and clean. I think that if I practice about 47 bazillion hours, I might come close. Thanks for your excellent videos!
It doesn't take long to learn, but when you practice be CONSISTENT and practice the same joint until you're proficient, then perform other joints. Spend say an hour between breaks so you can work without interruption.
I learned brazing in High School, took me about a week to get good at it, maybe 5-6 hours total. If you've done regular oxy-acetylene welding, this is about like that but with less melting the steel.
Should have said brazillion
AHH the great smell of brazing ,The oxy acetylene process/ brazing was the first welding process I learned in vo tech. Many people dont realize the incredible strength of brazing I remember brazing broken gear teeth that saved thousands of dollars. To replace the gear was over $2700 dollars and to repair it was about $20.... great job.
Yup. It's still the only process commonly used on saw blades. Have you see what a well made saw blade costs? Check out Forrest blades, they're the best made in America blades you can get and you pay for it, too! I was surprised to see even the diablo blade I bought from Freud for my sawzall even has brazed carbide teeth on it. She's an absolute beast with that blade on it!
Damn your right thinking about it. Never thought brazing was that strong
@@jamesavery6671 50,000psi typical, up to 65,000psi for a good braze weld with low fuming bronze. Silicon bronze and the aluminum bronzes are even stronger, but less ductile and shock resistant.
@ARCTURUS "...The oxy acetylene process/ brazing was the first welding process I learned in vo tech...." Same with my son. He did some very nice braze welds, as well as steel. When he got around to TIG welding, it was a cinch.
I learned more in 14.5 minutes here than I have in the last year trying to learn this through practice. Thank you so much!
Its such a pleasure to watch your videos. Its obvious that you are passionate about your trade and a great teacher. Thanks for doing what you do!
this guy is a great teacher. one detail for those who are interested - it is not capillary action that joins the surfaces, they join as a result of molecular interaction of the liquid metal with the solid metal, caused by wetting.
Started gas weldng/brazing this weekend. Your video has helped in knowing what I SHOULD be doing and what to expect when it is done correctly.
Thanks for doing this video Bob. Haven't brazed in about a thousand years but can remember using it on a lot of things in the past and recall admiring how surprised I was at the strength of the bond. I hope the students attending your class realize how lucky they are to have someone like you teaching them.
Oxy acetylene, or gas welding and brazing is great! I learned it first along with cutting. Then I learned using propane. It is still my failsafe go to. I will never forget the comments the first time someone watched me literally weld a copper heat exchanger with gas. I use a lot of high tech today but still love old school gas.
Keep your great videos comming! You are doing the trade a great service by being a excellent teacher!
What is the difference with Propane? What pressures do you use for oxygen and propane, do you use the tip of the cone? Do you get more blackening of the tubes? Love the answers to those questions please.
Genuinely love your guy's videos, old and new. Your use and expertise of not only the welding methods and knowledge but also the camera footage you provide makes it so much easier for me to learn how to do these processes myself. Thank you!
Very enjoyable seeing little used techniques. I was taught at General Motors Fisher Body in NJ in 69 oxy acetylene wire weld and lead joints and using weld wire to make rivets on metal to join panels . I miss it and really enjoy seeing a welder doing his craft well. I am always telling young kids there is so much out there And it pays well and you have a nice product when you are done . Such a Blessing !Thanks you for providing Good resource.
Thank you for showing us all how to make brazing happen. This was taught when I was in school metal shop. Some of the fondest time spent in shop class. Today they do not even have shop classes or even music class so i am told. Nicely done fella too.
So happy to see and hear someone still teaching base welding tech. Gas [oxy-act] along with brazing. Low Fuming Bronze brazing is what I learned first back in '75. Glad I rolled into your channel.
Same technique for our shipboard repairs back in the 80's. Nice job.
I took a welding class in adult education and loved it. Our class was divided in half...one side learned stick and Mig...the other oxyacetylene and stick. Unfortunately, I didn’t get the opportunity to learn the oxyacetylene because we ran out of time. I’m thinking of just going and buying a set and teach myself. Your vids help immensely!
Bob. Thanks for this. Thanks for what you do here and how you teach. Your teaching style is nicely refined. Your knowledge and talent being shared is greatly appreciated by me and by many I'm sure.
This 60yo firefighter is learning a bunch from you.
I have a 1200 sq ft "man shed" that has just gained a budget arc welder. With your assistance, I am teaching myself how to weld and work with metal. Something I've always been interested in but never had the funds nor time to pursue.
Now? Bring it on, buddy. I'm ready.
I truly dig this tutorial, it shows or teaches so much in such short time, the distance of the tip not being constant was the biggest tip I learned. I also watch your videos more than others because being left handed, I can mimic/ follow your movements easier. overall, everything makes more sense. thank you.
It seems that if you'd have put higher heat into it, you would get partial drips on the other side. I appreciate the tight camera shots showing the technique.
Perhaps. Honestly I'm only familiar with copper and silver rods used for HVAC brazing.
The rods he,s using seems to be almost 40% zinc. Its practically brass.
It looks much less fluid than the silver rods used for brazing copper HVAC pipes.
My father in law restored his 1957 by brazing all the replacement panels in. We worked on an old 68 Chevelle we pulled out of the weeds and we started to strip the body. The quarter was replaced and at some point in the past, once we got down to the seam...by George it was brazed! Very very strong!
in school my old agg teacher was a retired pipeline welder this was my first weld he taught me
Thank you for taking the time and effort to make an educative video in which we can learn the science behind “welding”. You show that it’s not just what you learned watching others weld but the fact that there is a science behind all. Thank you.
So good to see these videos, Bob! I learned these things in high-school and by teaching myself, and now that I'm retired, I'm picking them back up to keep busy, and fix things for family members.
Thanks again!
Good to hear.
Got my first welder for christmas and I am so excited to get fully into it
This is a really good skill to have under your belt as a welder. This was one of the first things I learned as a young kid with a full set of bottles and a butt load of time. I learned a skill and kept out of trouble at the same time. Idle hands being the devils workshop. Thanks for the look back.
You are a wonderful teacher sir. Thank you! Do you always hold the torch in the left hand and manipulate the rod with your right? I’m right handed and feel more comfortable with the torch in my right and the rod in my left, but I’m not the greatest, so I was curious as to whether or not I’m selling myself short. Thank you again.
Ben Rifkin Wondered that myself!
Not an expert here but holding the rod with my dominant hand worked best for me.
Some of the best brazing I've seen in a while. Excellent technique and control. Thank you!
Very nice presentation! Excellent video recording! This takes me back about 40 years to auto body school and as you stated the progression of torch first and then wire welding MIG. I later in life learned silver brazing with 15% and 45% silver depending on the application. I cannot thank my junior year teacher for teaching us the techniques! (Never learned to TIG but assuming at 55 the need to learn is pretty low)
Learned braze welding in navy weld school years ago. We were taught a different technique that that leaves the bond looking like a really nice weld bead. I see that you pull the flame outward. What we were taught was more similar to SMAW with say a 6011 rod. The filler rod and the flame move back and forward together like a dance. We'd move the flame back (not out), bring the rod in and "dip," then move the flame and puddle forward. The rod always remaining in the flame envelop as well. A very intimate dance. In this way, the flame envelope seems to better prevent contamination and I found that it allows you to control the process better and without as much manipulation. It also seems faster to me. Like 6011, one might maneuver a bit side to side to wet in stubborn edge point, but generally a back and forth motion. We also got to do this in the over head position on . . . ahhhh! Cool video. Thanks
Amazing video. I watched a few videos earlier and they just didn't get quite in depth. And explain things like pressure or thickness of wire and such. THANK YOU!!!
Good video. Very easy to listen to...no pointless rambling. Learned lots already....Thanks!!
That is how I learned. Bare P bronze with AntiBorax flux. Victor 100. The phosphor bronze rod is eutectic so once it reaches melting point, it flows like water. Also used food grade silver bearing for stainless matching. Still have that flux in my tool box.
I've just got into brazing. I am trying to braze some steel legs for a bench but the steel always gets covered in a black soot from the torch. Could anyone tell me what I'm doing wrong? Great video very helpful 👍
More oxygen
When I still lived in England my home country I used to build race car chassis we used use sifbronze its a dying art great to see you doing this
Brazing has a lot of haters in people who don't even know much about it. It's my go to. I've found it easy to learn, less distractions with no metal popping all over and just generally cleaner and less stressful to begin with. A lot of it is almost as strong and best of all it never rusts!
What you are demonstrating is "Bronzewelding" Brazing involves a different joint design (lap/socket ) joint and a different composition filler metal (nearer the Eutectic).
Great video. It’s nice to see a technique that can be utilized without using a lot of expensive equipment.
How strong is brass brazing? For example what would you use this application for? I imagine not any heavy duty structural applications but I would love to know what brass brazing would apply to. Thanks for the knowledge friend. I appreciate you sharing.
I just purchased some tanks and torches because of this awesome tutorial. Thanks for sharing
If I can do silver soldering, I should be able to braze? I have a lawn mower deck I need to repair, can I patch holes and braze them? I really like the way you explain things. Calm, collected, very sure of yourself, got my attention early and kept it. Thanks for showing & sharing
Great close up of the flame and rod intersection!
Good video. Here is one little tip for you. This works especially for lighter gage materials say 14 gage or 12 gage. Should work on any thickness though when brazing. To control the width of a brazing bead try using a No.2 pencil and mark out lines say 3/8" wide and run a bead inside the lines. The brazing material won't cross the pencil lead. Don't ask me why lol. An old timer taught me that 30 years ago. Helps make a nice straight bead. Try it out and let me know what you think. It should work for you.
very cool video~ just did some brazing to make a condensate pan at work for hvac job. While working at a body shop years ago seen the foreman do some brazing on a wrecked truck and I was amazed at how it looked just like a row of dimes from a tig weld . I have tried over and over but could never get that look of the row of dimes
Which of those chemicals is the built-in flux please?
Excellent video.
I do silver solder for a living. I work with stainless,copper,brass.....sometimes all in the same part! I often wondered what more i could do with this skill? Doing something neat like this looks like a lot of fun!
"pretty good size gap, if you can (say) see that on camera"
he said if you can see
2nd best channel to learn anything related to welding brazing soldering. Your students are lucky to have such a great teacher with a wealth of knowledge. Who is 1st.................😃
So glad I bumbled upon this channel. I have been thinking of learning to do some basic welding, just hobby, decorative stuff. I have found good welders to be more $$$ than I can put out at this time. Brazing will do great to meet my needs. Thank you so much.
thanks i learned oxy acetylene in high school ,long ago,now im a beekeeper and want to braze copper to make a oxalic acid vaporizor for mite treating hives,solder too low melting,so im going to try oxy / map little brazing kit,i like your explanations,soon im going to harbor freight for a tig set up, to compliment my mig,ill be following...
Hey Bob, Great video you have here. I realize it is a couple years old, but I just stumbled across it. I am a "amateur" welder. I have a small stick welder and a small MIG welder just for small jobs around the farm/homestead. I wanted to ask you "how strong is the brazing as opposed to say a 70,000 psi welding rod?" I have never tried brazing, but could see it as a very useful tool in certain applications. Thanks, RR
Love this I still braze a good deal . Thank you for this video to refresh me with the basics.
Really enjoy your instructional techniques find them very informative . Keep up the great classes. Thanks
Great video. Really interesting to see some brazing being done. You did a great job of filming the molten puddle, very clear. It really helped in seeing what was going on. Thanks!
In my two year course, I started with OAW, went to TIG, SMAW, then MIG.
Great Video. Shows how its done. Did a lot of Brazing in the late 60s, early 70s and then got away from it. It is like Tig and it looks so Pretty when your done.
Bob, you rock! Love watching your videos. Lots of variety from a guy who really knows his stuff. Keep up the great work.
You always tell me exactly what I need to know just when I realise what I need to know.
This was everything I could have wanted in an instructional video sir. Thank you very much!
Some people watch basketball, baseball or football, but I could watch this stuff for hours. I might be building a Legal Eagle XL and brazing is the main method for connecting all the frame pieces together.
I have a table made out of 1" Sq tubing and it is all covered in brass made by the best weldor I ever met his work was amazing wish I had met him sooner
We'd love to see a picture. If you've got an Instagram or facebook account, do share! Be sure to tag us so we know to look.
I worked for a gentleman that loved using a torch. he was amazing with it. so of course I was excited and not disappointed in this video. if you get a chance check his company out. it's TM technologies. I no longer work there but still love the idea of using the torch. it is amazing what you can do with a torch that most people don't know you can do. Love your video's. Maybe I'm a dork but I always look forward to what comes out
That's what we love to hear! Thanks for the support
The type of teacher teaching the kids chemical comp of metals before striking an arc.
I live in the rust belt so brazing is a very valuable skill to have. Could you guys do some cladding oxy/fuel videos using filler metals with melting temps much higher than the base metal. This comes in handy for valve seats. Stoody makes some nice bare wire for that sort of thing.
I appreciate your knowledge and how you show others the skill of brazing. Very informative .Thank You
I'm loving the videos! I have a jeep Wrangler with a ton of rust. Frame is a normal 1/8" thick but the body rails are thinner and the floor pans are like 19 gauge metal. Will this product work on thinner metal? Or is there a more sufficient product to use for thinner metal? I've brazed and soldered copper my whole life, so I'm more comfortable with a torche.
I'm curious... Why would you braze and not weld? I just completed a basic welding class and brazing was not covered. We did oxyfuel cutting and welding, stick and MIG.
John McDermott well, to answer your question. you may find yourself in a situation that requires the joining of steel to brass or copper, something like that. I. which case welding is impossible, thus brazing becomes necessary to complete the task at hand.
Cool technique. I've always wondered about using dissimilar metals for projects like this. Do you find that brazing like this will subject the piece to electrolytic degradation? Also, I assume the brazed joint is somewhat less structurally sound than a similar welded joint? Thanks for uploading this.
What are the advantages of brazing over tig or mig? is the weld more flexible for high stress joints? why would i choose brazing over another type of welding?
There are different advantages for different applications, but probably the widest reason it's considered is because of its lower melting temperature for heat sensitive materials.
Great video,my question is,I have a gas tank off of a motor cycle that has a small crack in the seam.Is it possible to Braze it,using LP and make a good repair?I think the metal isn't very thick and a welder would burn it.The tank has been empty for several months now and aired out in preparation for the try,don't want it to blow up on me.What do you think and,or would you do or advise for me to do.Thanks.
I like the hand slide technique @7:14 lol. Awesome work, we're lucky to have your videos to learn
brazing is easy if you got the technique down. although i struggle with it i still lay down pretty good welds for a beginner at brazing. love the video you should do brazing on t-joint.
Great videos as always. Bob, rather than oxy acetylene I want to use a oxy propane setup for heating brazing and occasional cutting. Are there any notable cons to this alternative method and do I need different hoses with an oxy propane setup or can I use my existing oxy acetylene hoses. I do have an oxy propane torch?
My first brazing class for my apprenticeship is in 1 month. Time to learn.
Thanks for the information. I "learned" how to gas weld back in high school, as you said, before we went to stick and wire feed welding. However, 30 years later I find myself in a situation were gas welding is preferential for my job. What is the strength difference of brazing, and gas welding, and stick welding? Thanks again.
Thanks for this. There are some of us who can't weld anymore because the welders can interfere with implanted pacemakers and defibulators. Yep, that's a thing.
That was great insight, thanks fir your time. I really enjoy watching your videos. Unfortunately I don't have time to go to a school to learn the proper way so I need to rely on these RUclips videos and I'm glade I came across this channel. Thanks again. When my kids are big enough they will learn welding at a school prior to any college.
I learned ocyact welding on my own in my Dads garage on customers vehicles usually on exhaust systems. I eventually was able to patch a hole on rusty tailpipe with baling wire. On a hole the size of a quarter I would tack a piece of wire on one side then the other then lay one next to that one. The next thing would be to weave the two together. You had to get in and out just like you demonstrated. Rinse and repeat until the hole was plugged. In later years a guy told me if I could do that, I could weld anything. Perhaps. I am 68 and find myself still trying to be the welder my dad was. Your videos might actually get me there. A problem that I have is with my Hobert beta mig setting the voltage and wire speed is not nearly as accurate as your machines.
Believe it or not I learned about brazing in jr high shop class in the mid 80s. I don't know how many districts offer that sort of thing, but it seems rare nowadays. I didn't pick it up again until about 9-10 years ago when I got a hold of a torch rig as payment for moving my mother in law out of her house. (It was her late hubby's so she didn't need it) I have found brazing to be very useful in repairs and fabrication in my garage workshop. I've used it to repair a cast iron well pump and my shop vise. The pump repair outlasted the motor on the pump.😄 I also use it to join thin walled tubing when trying to weld it would just burn holes through it.
I came here to learn a brazing technique so I can braze a piece of rebar to the bottom of my firepit cooking grate. It is 36" in diameter and has no support under. I'm worried about it sagging over time with weight of food on it and the heat. That being said, I think I'll only need to spot braze the end of the rebar to the outside of the grate and maybe spot braze 3 or 4 places in between. I have a propane / mapp torch that I think will work, which would you recommend? Also, as far as eye protection is concerned, would you think it necessary to get specialty dark glasses, or would my polarized sunglasses work, since this is a very small project? Thanks.
I have finally got of my ass to learn what the definition of “brazing “ actually is and was oh so fortunate to find your video. I know nothing about welding and am developing an interest to pursue it. You sir, are an excellent instructor. Wish I was in your area (wherever that is ) so that I could take a class from you. Excellent, comprehensive video. Thanks so much.
I like what you said, "When do we see braising projects? Never." I need to cut some 1/4 inch copper hose out of a proprietary brass fitting, and braise it to a normal propane fitting, and be assured it doesn't leak. I am now searching your videos.
2 questions
Is brazing as strong as other welding processes?
Is there anything you personally can't, don't, or won't weld? I asked in this manner because everyone has something that they just don't prefer to do.
Thank you for this great video. I've been wanting to see some brazing techniques.
Ben Lee brazing doesn't melt the parent material, your essentially melting the filler and joining the two pieces of metal with it. Brazing can be immensely strong, however it isn't as strong as welding. It does have the ability to join materials that are incompatible to weld. If you were to weld stainless to aluminum, the weld would crack/junk. However you could braze it.
Lake School Restoration Channel
What filler rod is good for brazing SS to Al?
I've been ask (and told) to weld on gas tanks. Won't do it. Ever.
Bob Moffatt that's definitely a project that should be done by the person trying to pass it off. I remember hearing about a fatal osha investigation where a guy tried to weld on a empty drum that previously held acetone. Supposedly it was cleaned/rinsed. The guy was welding on some casters and either blew through the drum or it got hot enough to ignite. There was enough remaining acetone that it blew up and threw the man a few feet away. Definitely not worth the risk.
I am attempting to repair a small leak in a copper heat exchanger for a marine Diesel engine. I am using phoscopper rod. This the first time in 15 years I have lighted a torch, so have much to remember. After the first attempt, there is a very small drip from a location that I can’t isolate. At 60 psi, a tsp of water with dissolved flux leaks out in a couple hours. The weld surface of full of pocks so I must have applied to much heat and or let the flame drift to oxidizing.
Should I grind the weld back and do second run with smaller tip, or is there a better way forward?
thanks for all your efforts making these videos , this one took me back to my grand dad and memories that I cherish ! thank you
I use to deliver 1000 newspapers when i was 13 used to have 3 big bags hanging off me with multiple trips back home for refills my dad introduced me to the world of fabrication and we made a trailer all brazed together to go behind my bike to carry all my papers it was awesome!!
Good stuff! Are you still fabricating?
still fabricate none of my tickets are alive anymore majority of my time is spent designing.
1000 hunh? You would have needed that trailer. I delivered 350 on Sunday and when offered it had to turn down my 4th route because my dad didn't weld/braze. I'm forever designing things in my head, some make it to paper and even fewer to real life. I'd love to build a long electric trailer. Got some 20 bmx wheels & a black rooftop suv carrier made by Porsche. Not sure what motor/s to use. Would like to have it push me and camp out of it.
Love your teaching style. Thanks for this.
Love the 2 cam shots, Bob. Excellent vid!
Great to see this, I still do quite a bit of gas brazing and always enjoy it
Where can I buy the tanks, hose etc?
Great method! I use it alot on exhaust manifolds insted of welding. Works great!!
Great videos. Top notch instructor. Skilled, old school craftsman. Awesome.
Building a cab for my tractor, my mig seems to be screwing up. I am a plumber/pipefitter and i do have medical gas braze certs but was wondering if i can bronze braze this square tube frame but im wondering about annealing the steel too much and losing the rigidity of it. I know when i braze copper the end result is a very strong joint but the surrounding tube is very soft now
I would like to try this technique, could I join stainless steel or silver plated cutlery this way using propane ? what type of rod would I need ? I don't own a welding machine.
This video helped me alot I had never done it and had to find out for work and by the 4th pass I had it looking great
Informative, technical, and easy on the ears. Yeah man, you're good.
This was great, what kind of applications would be best to braze over weld? I would be interested in details and a demonstration of soldering. Thanks very much
Brazing can be used for joining chromoly pipes together or dissimilar metals. It's pretty much similar to bolting and riveting, but hot.
I need to join a 3/8" thick exhaust flange to 2.25" tubing. The tubing is very thin compared to how thick the flange is. Both are stainless steel. I knew an exhaust fabricator who preferred brazing because it was easy to make a perfect air tight seal. I don't have a TIG machine. The other end of the pipe will fit into a resonator with and overlap fitting. The tubing is 409 stainless and the resonator is 304.
What type of flux and brazing rods do I need?
That reminds me when I was young used to braise in patch panels