🔥 Flame Cutting with Oxy Acetylene
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- Опубликовано: 5 окт 2024
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Learn how to cut steel freehand with an oxy / acetylene torch and a burn bar. A burn bar is a tool you can build that will help you cut straight lines and bevels nearly perfect.
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I glad you cover the Oxy/Acetylene torch I feel it is an over looked tool that is still very popular especially with the home shop. I would like you to cover the torch in more detail if you could. pressure settings, tips sizes, flame tip adjustments. From what I've seen on you tube is many welders assume that using a torch is common knowledge. Maybe a series on torch usage 101 would be good.
Bob is really knowledgeable and I enjoy watching his videos, keep this guy around.
Bob Moffett left weld.com a few months ago I think he posted on the wall. Com facebook page. Not sure.
I like you style. I find it very, extremely useful. Taking welding at a Trade Tech School in Vernal, Utah. Thank God, I am not in the Big City anymore. I'm originally from L.A. through the Pandemic. Now here bcz of my family. Wanted to be next to them. Having an aging mother. Met a kid from Klamath, Oregon. Interesting how it is a small world.
Thank you very much for all that you do. :)
Back when my Old Man was a union carpenter, he showed me how to mark stock accurately. Sharp pencil, pointed like a wood chisel, and each location is marked in 2 slightly different directions, so that one knows to measure from the point of one "V" to the point of the other.
I had earlier unsubscribed but returned and remain since Bob has started instructing. I find his style, depth of knowledge and experience, and demonstrated skill are second to none.
Clean tips makes things so much nicer for welding & cutting with a torch! Can you guys do videos talking about the max withdrawl rates for oxy/acetylene rigs and talk a bit about what different sized tanks are useful for. That would be SUPER helpful!
To prevent withdrawl of liquid acetone out of an Acetylene cylinder youre allowed 1/7th of the bottles capacity per hour. Is what i was always taught. And if you lay the bottle down for an hour stand it up for an hour before you use it
You do an excellent job, Bob! I have the "high speed shimmies" too. I like to call it "auto oscillation" or "whip-n-rattle".
Hey Bob just wanted to tell you that i really enjoy your videos ive spent over 30 years as a pipefitter in that 30 years ive had to weld and worked around some incredible pipe fitters and fabricators. Ive never been near a strong a fabricator as i am a PF there is a big difference. Im currently trying to become a CWI I take a 10 day seminar and a test in may. Im doing the 1104 i think you would be great at doing seminars to become a CWI. I caught your video where you welded cupons and did a bend test root and face and got so much out of it. When im studying and want to refresh my memory on a welding process or whatever ill look at one of your videos and always get something out of it that always applies. Thanks for that. You are definently one of a kind and I mean that in a good way keep those videos going you are helping alot of people out there Bob including me and im a 51 year old craftsman.
"blowin up the corner of the pentagon" ... aaaand demonitized.
Gets a visit from the fbi
Gets a visit feom the f b i
We warned him
When I was learning to oxy fuel cut around 45 years ago we had to use a ascribed line with dot punch marks along it. After cutting we were expected to have just half the dot punch marks left. if the whole mark was there or none at all we had to do it again until it was right.
I learned the same way, but thats only 12 years ago...
I do this for MACHINING! Say, on a milling machine. Or even some hand work, when you file down to a line and see the half punch marks. I never would have dreamed that you could do this with a TORCH! I do a little torch cutting, and when it's done I'm just glad I didn't get hurt. It usually looks like a bad accident when it's over. WELL, let's watch this a few times and try to be better! If I was good at torch cutting, there's lots of it to do! Plus, I can have some free material when it's all over.
hey Bob, I just about fell outta my chair at the end of your video. I also worked at Columbia Plywood on the graveyard shift as i went to O.I.T. (probably 1979-ish). Coincidentally, i am now retired and learning how to weld as a hobby. Small world, huh!? I enjoyed your video and look forward to more. Thanks for the info..........................Bill
I was there in 79
Those cuts are so clean.
Great demonstration! Always prided myself with my torch cutting work. My go to guides for over 40 years are a 2' and a 3' foot one. Made with 6 sided drill stock from jack hammers with 1/4" steel flat tabs welded on along with 2 die maker magnets welded on the 2 footer and 3 on the 3 footer. They rods are positioned so one pointed side is facing towards the side that the torch will be guiding on for straight down cuts and also the angle can be used as a bevel cut guide. Tabs allowed the bar to be clamped when needed but most of the time the magnets did the job on steel. I must have made over 20 of them for guys when they saw me using mine. My go to torch has always been my favorite Oxweld W17 combo torch, which no one else was allow to use, which teed off a lot of guys- but too bad. I notice your guide was also marked instructor only. I can see other torch videos you can make showing how to cut off bearing races with out ever nicking the shaft or cutting off frozen nuts without ever touching the threads or burning out bushings controlling the oxy. by feathering the lever. Your students are very fortunate to have an instructor that is not only technical but very field experienced. Thanks Ed K. Cleve. Oh.
Hey if its your tool you dont lend it to anyone unless they treat their tools better than you do.
There is a saying; Never lend your tools or your wife, 'coz they both will come back fucked!
My late grandfather instilled in me a principle: Leave things better than the way you found them.
My previous boss contributed to this principle: If someone lends you a tool, you return it to them in better shape. (This applied once specifically to a Bosch rotary hammer drill.)
That said, know the person you lend your tool out to. And choose which tools you want to risk lending ;)
Oxy-Acet....I had a welding shop in the early 1980's...cut a lot of plate up to 1/2" ....The first plasma cutters were just showing up...they were too big to put in the back on a pick-up truck....usually on a trailer...... I bought a Koike Handy- Auto....great investment...I think they still make them.
His students are very fortunate indeed! A picture of your cutting guide would be awesome, although I have a fair idea of your setup through your wonderful description!
i had no idea you could cut that fast and cleanly with a torch........... holy crap
waderedsox yes you cut quickly with a torch. You must preheat your metal. You must the correct oxygen and acetylene pressures for a given thickness. You must also have the correct cutting tip size. You can also weld and brave with this same torch. All you need is a welding tip and lower had settings.
Really enjoy your video's and all the helpful hints. I don't have any formal training so everything I do is sort of trail and error which is not really ideal. Love the idea of a burn bar. Most of my oxy cuts are done by hand and like you my steadiness has diminished as I've gotten older and don't always look like I'd like them to. Just learned something new watching you - I've never preheated the entire cut before hand which apparently I should have been doing. Thanks again look forward to your next video
You can sharpen soap stone with a regular old hand crank pencil sharpener. I've one mounted to my welding table.
Excellent. Thank you.. now I need to watch all your videos. I have been welding some, but now want to get better at using the torch.
Most useful info Paul - I have tried to switch to plasma cutting but still think back to oxy cutting days - must say if attention is paid as you described, it truly can be a super method... mine no way as good as yours. Must try it again!
Nice video lefty! Thanks for posting it.
I ended up going with Oxy/Propane. I was reading through my Home Owners Policy and according to it (SFarm), I can't have Acetylene on my property. Something to think about for those using or considering an Oxy/Fuel torch.
Very good video I work in the steel Bridge fabrication industry. I run torches for a living. Doing various types of copes, bevels etc.
i like Oxy / Acetylene gouging over arc air after a older journeymen showed me how to do it so much cleaner and easier then arc air i found
Thank you Sir for sharing your talent.
Nice cutting, torch sounds about right, clean that tip often.....I used to take a cold-chisel and raise a small burr on the edge of stuff....often got a faster preheat, especially heavier plate.
Make a video about oxy acetylene welding for different metals.
Thanks for the great videos.
Do you know if he does aluminum OFW?
John Ratko no, where is the link of the video?
Bring it here please.
toolman talal I was thinking the same thing. I always thought that if you could learn to weld with a flame and a stick of wire, then TIG would be an easy transition. Also it is a lot easier to get a couple bottles out to a field then a generator, a TIG set-up.
The Oxy-fuel process does not work on non ferrous metals. You can melt aluminum and blow it away with the cutting jet, but it will splatter all over the place and look horrible (I know, I tried it). Oxy-fuel works on steel because the iron oxide formed has a lower melting point than the steel, also unlike other metals, iron oxide is much more fluid and runs out of the cut exposing fresh metal to the cutting jet. Aluminum on the other hand has a melting point of 1,200 degrees F, but aluminum oxide melts at 3,600 F and is goea and sticky, it's whats called a refractory oxide. Stainless steel and copper have the same problem, but that's what plasma cutting is for.
+David Marquardt bullshit. Aluminum is non-ferrous and I've OFW'd it many times. How do you think they welded aluminum on early aircraft? Even up into WWII most aircraft fuel tanks were OFW'd. It's not easy, but definitely doable.
This lefty girl appreciates you.
Thank you man. I have this torch and never I tried because I am worry of any recoil of the flame. Could you share any video that teaching to operate this kind of torch safe?
it is so difficult for me to make a long consistent cut. I cut about 4 inches and reposition. I really rely on a guide, even for plasma cutting. I love my track torch btw. haha!
Awesome videos!!! I'd like to see your setup on your other burn bars and how you use them. Do you factor in the kerf when you design your burn bar?
I use an auto center punch and then swipe it with a red or gray perma-marker.
My instructors were Richard F. Larkins and Charlie Overfelt....The irony is that them growing up in two different worlds aircraft and flatheads were a common theme. Swamp or drag strip ? No problem. Just Do It
you say alot about fitting up on beams. I'd really like to see your take on all that fun stuff. I'm a class A fitter and I started in welding school learning how to burn up steel. I'm the do it all, fix everyone's crap guy. and I want to learn it all. I've told so many ppl the importance of a sharp soap, it's good rederic. throw some more info at me
I mean nothing by it but its spelled rhetoric
Excellent tutorial 😊 very helpful
Challenge a track torch to a bevel ?
Hmmmm 🤔🤔 I'm not that good, but have seen guys do it !!
Nice video Bob !!
Excellent cuts. Much better than mine.
I'm just starting , thanks for the
wonderful info!
This guy gets it. Work smarter, not harder. Old school dude using his noggin and not his back.
great video! could you post a sketch of the burn bar? what is the purpose of having the second plate on the bottom? how do you line up you cut ?
My Dad could cut a tail pipe off a muffler. Burn the outside pipe off and leave the inside pipe intact.
He died before he could teach me.
very nice , thanks for the lesson,, gonna make myself one or two ,, thanks again,,
As always a great video. I’m curious about the forward direction you always favor. I’ve always pulled the torch when cutting. Is it better to push it ? Thanks
Great video and really useful information thanks.
Excellent video! I think you should do a video on the basics of the oxy-fuel cutting process. Such as setting the pressures on the regulators, flame adjustment, proper shutdown procedure, etc. Just like ww_big_al says below.
Great tips bob👍 hey where has Wyatt been mister tig has been sorely missed
Being faced with the logistics of managing two people and two video series, and after receiving very positive feedback on our new MIG Monday host, Bob Moffatt, we decided to instate Bob as the new host of both our Monday and Friday shows. Wyatt (aka Mr. TIG) has been an exceptional host and has provided a wealth of knowledge to the welding community through videos and articles, but unfortunately having two hosts was not logistically sustainable. We hope you will continue to follow us and find the content we provide each week as educational and informative as ever. If that is true, please share our videos with your friends and thanks for watching!
TheMixmastamike1000 bob is way better than that fake mr tig that runs shitty looking beads
Most guys watching this wish they could cut that good with there plasma cutter
I have 2 plasma cutters but still prefer the acetylene torch
Interesting comment, can you elaborate on it further about your experiences?
Doing freehand cuts I can get a smoother cut that cleans up easier than with a plasma. I think it has to do with the weight of the gas torch verses the very light weight plasma torch. That weight adds stability in your movement.
ww321 that makes a lot of sense. Kind of like the steady-cam rigs camera operators use to stabilize their shots, versus just hand-holding the camera.
I love using my everlast plasma cutter but I'm getting older and I find that I'm not as steady as I used to be. Thank goodness for torch standoffs!
Same here. The torch simply gives a cleaner cut with less dross. In fact, done properly I can consistently get cuts as clean as a saw. Plasma always leaves much more dross/slag, and since it isn't as well oxidized it often doesn't simply knock right off, but instead has to be ground away. I relegate the plasma machine to the rare times that I need to make odd cuts on aluminum or stainless.
Will you PLEASE tell us what has happened to Wyatt, MR. TIG, is he sick or just gave up doing videos, I think we all want to know.
Being faced with the logistics of managing two people and two video series, and after receiving very positive feedback on our new MIG Monday host, Bob Moffatt, we decided to instate Bob as the new host of both our Monday and Friday shows. Wyatt (aka Mr. TIG) has been an exceptional host and has provided a wealth of knowledge to the welding community through videos and articles, but unfortunately having two hosts was not logistically sustainable. We hope you will continue to follow us and find the content we provide each week as educational and informative as ever. If that is true, please share our videos with your friends and thanks for watching!
I find that very hard believe. Bob is great but Mr. Tig is a youtube legend and I always thought of of him as the face of Weld.com, no one in their right mind would stop doing videos with him for "logistic" reasons. Either way its a huge mistake in my mind, especially if it really was solely weld.com's decision.
Steve just Steve mr. Tig was limited and All he did was tig it seemed to me that he had zero knowledge of any other welding process
+torcher78 Whats your point? lol jk
Bob is an excellent instructor with a wealth of knowledge in all processes. Being an excellent welder is one thing. But being able to articulate it into an instructional video is defiantly Bob's niche. You got a keeper here for sure.
great video you should do a cigweld 140 weldskill lift tig review keep up the great work
I really need a good oxy fuel set up. I also want to get myself a powerplasma cutter. Then I think Ill be set for cutting metal.
If you're cutting thinner stock and getting melted material back-filling your cut, is it simply a matter of lowering your temp? I tried speeding up, but then I lose the cut. I do notice that I've been setting my flame by adding more oxygen, and the cones are small and discreet. When I depress the oxygen lever, it substantially shortens the flame. I'll try setting my flame to what you show in the vid.
I no use a bar for cutting, hand cutting 30,40,50 or even a 100mm thick either round or flat stock need to be cut by hand only providing higher concentration and deeper respiration technique to achieve straight and perfect cuts even when cutting 1.6 and 3mm thick plates
when it comes to root pass on pipes tig welding is mostly used or a 6010,6011 or 7016 for smaw depending upon the wps. now my question: is fcaw can be used to root pass a 6g pipe? if so, can you please make a demo how to properly do it? thanks
thanks for the great information please keap the vids coming
Just saw your video on this I'm to old to cut with out the old age shakes and I us a 1/4 piece of angle with soap stone powder on the angle and try to cut without slag.
!!!!!! Hello just wondering Why is it So hard to Tell some one the Pressures on the Gauges If this is for Beginner,s not good Plan So I Could set mine Up thank you for your time
Im a millwright in canada. And an iron worker taught me a lot of slick torch tricks
Nice cutting!
Great video-what size tip would you use for automotive use cutting fasteners and such on vehicles?
I am sure Mr Tig is on vacation.
Can you do a mig hard facing video? I think it would be very interesting. Thanks.
We will get this one out next week. Thanks for the request.
What kind of metal are you using?
Bob, another video. Thanks.
Real weld.com fans will remember "Welcome to weld.com, I'm Bob Moffatt with Cowley College"
Can you please do how to use a pipe bevels
Share the tip size 👍
Great vid, 👌🏻... God bless🙏🏻
Propane is a cleaner cut
How deep would these cut?
Whats the pressure set at?
hi bob, i saw in your cuts you heat with the tip straight up and cut with a slight angle, i have a oxy-propane rig i use mostly for preheat but i will buy a cutting tip, is the technique the same, also you seem to keep the preheat cones(?) about 1/8 off the plate while cutting (sorry for the terminology if wrong) is this ok too with oxypropane?. if you have made a video about oxy propane sorry for the questions if you can share the link i haven`t been able to find it. thanks again for the education. take care. pete. ps these cuts look awesome
Yes, it should be the same. Travel speed may vary slightly. Cut quality should be the same. I lean the torch slightly forward to maintain preheat and have the sparks go away from me during the cut.
SHARP SOAPS ONLY IN 2022 💪💪💪💪
hi what is the name of the cut size called when using an oxy?
kerf
What is doing the cutting the oxygen or the acetylene?
Anthony Giordano the oxygen
The extra oxygen blows the molten metal away
Is this cat from oregon?
0:50 yeah yeah I've been told 🙄
Great video. What brand of tig gloves are you wearing? And where can I get some? seen the name Ton Flex/ Tig. Thank you.
They are Steiner Gloves and can be found at just about any Steiner online retailer.
Doughboy was a salesman. Bob is a fabricator...like Jody
Let's say that I have a oil barrel and I got ask whu happened to if I get at a torch and I hover flame up above a oiliy residue barrel with water and, I get torch and hover it over the oil + water, is a explosion is waiting to happen?
DO NOT CUT ON DRUMS!
Bob Moffatt i didnt say cut, i said heatup/
My bad. Let me put it this way - Let me know when you get a torch around a drum that has an oily residue present. I don't want to be around! Don't want to read about anybody doing it either.
Why risk it? Oil + Fire don't mix...
+Weld.com because it shoudnt explode you know why, water is a coolant and a solvent and 4wk ago i cut pipe ongas bevler, all it didvwas flare up a flame, unhooked it, dipped in water, refitted and resumed cuttinf, no flameback
This can be difficult to learn.
seriously tho, 5 whole minutes of this video that had EXACTLY NOTHING TO DO with using an oxy acetylene torch. i learned so much! c'mon ... entering the realm of click bait
He def said butthole
Oops I fell asleep ok
I like to run a 1mm cutting disc over my chalk line. You get three advantages, you don't lose your line, it gives you clean metal to cut and if you keep your flame just off the keep side of the cut, it gives you a nice straight finish.
Ron Hickmott that’s a good tip, I’ll keep that in mind for thick cuts!
you are truly a master