Sorry if this video hit ur inbox multiple times. We had an issue when we were uploading it where only about half of the video was actually making it onto KZread. Took some time to get it all figured out.

@rlund3

5 жыл бұрын

Anticipation.

@leebarnhart9725

5 жыл бұрын

Weld.com I just got one and it was all there. And I liked it👍

@Taskarnin

5 жыл бұрын

Great videos. Can you guys do a video on welding stainless with oxy-acetylene? I'm a hobby welder and cash for an arc welder is not in the cards. The current project is a car exhaust, 316 stainless, 16 gauge 1.5 inch tube. I've had limited success using a flux to cover the front and back of the weld. However I'm sure my technique is lacking because the welds are pretty ugly!

@WTFChuk

5 жыл бұрын

Taskarnin what are you using for a flux? Backing fluxes for TIG welding may work, but I have never tried it (if anyone wants to donate a small amount of Solar Flux B to the cause, I will make a video :-) . One of, if not THE, mainstays of flux for OA welding of stainless is Oxweld Cromaloy flux. It has been variously branded Oxweld, L-Tec, ESAB, and All-State over the years, but it has always been called Cromaloy. It is no longer made, but Netwelder.com still shows some new-old stock L-Tec Cromaloy flux in stock: www.netwelder.com/cromaloy-brand-flux-for-welding-chromium-containing-alloys-1-pound-can/ There is a one-man outfit called TM Technologies that specializes in OA welding of most metals. They are primarily geared towards aluminum welding, and sell fluxes and filler rods of various aluminum alloys. However, they also support the OA welding of ferrous metals, stainless steel, and copper. On their stainless steel flux page, they list OA welding flux for both stainless steel as well as nickel alloys (i.e. Inconel) as well as TIG backing fluxes for both stainless and nickel alloys. At 4oz, the containers are only 1/4th the size of a container of Cromaloy, but it is much cheaper as well. IIRC his fluxes are made by Superior flux, and they have a good reputation. www.tinmantech.com/products/welding/welding-flux/stainless-steel-welding-flux.php In my opinion, I think a 4oz container of the TMTech stainless steel gas welding flux would be the best bet for starting out due to the reasonably low price. Follow the directions on mixing and use given with the flux. You mix it to a thin paste, cover both sides of the weld joint, and brush some on your filler rod as well. You probably already know this, but you should be using 316L filler on 316 parent metal. Stainless doesn't conduct heat as fast as steel, so use a torch tip one size smaller than you would for steel of the same thickness, and adjust the torch flame to just a hair on the carburizing side. I mean just the faintest bit of an acetylene feather thinly "coating" the inner cone. This will ensure that any minor pressure fluctuations don't accidentally make the flame oxidizing. On oxidizing flame on stainless will form very refractory chromium oxide, which is A Bad Thing™. At the same time, you don't want excess carbon for the stainless to pick up as it will encourage carbide precipitation at the grain boundaries. If you have 2-stage regulators of good quality and you are good at setting the flame, you can go ahead and adjust to a truly neutral flame, but when in doubt always go just a skosh to the carburizing side. After you get the torch and flux squared away, it's all practice, practice, practice. Stainless welds much like carbon steel. Easier in some respects. Remember, inner cone closer to puddle=more heat, inner cone further away=less heat. Do not, under any circumstances, flick the flame off to the side to reduce heating. It will reduce heating, but it will also expose the molten metal to the atmo, making a bunch of nasty chromium oxide. Bob has a couple videos in the Weld.com playlist where he demonstrates OA welding on mild steel both without and with filler. Aside from the necessity to keep the joint and filler rod fluxed, stainless welding is pretty much the same. Here's Bob doin' some gas welding: Gas Welding Technique: kzread.info/dash/bejne/nXqNz6SPZs_Flps.html Gas Welding part 2 (with filler rod): kzread.info/dash/bejne/Z5alxpurmLzeds4.html Gas welding with filler wire: kzread.info/dash/bejne/i3VpsKyqg7TYicY.html Once you become proficient with it you may even lose your desire to buy a TIG machine :-D

@Taskarnin

5 жыл бұрын

@@WTFChuk I'm currently using the solar flux type B. Wish I knew about the alternatives you listed above, the stuff is expensive but seems to work well. A pound was $40, figured I'd waste a quarter of it learning how to use it and a quarter on this project. I also figured learning how to weld with flux may help with aluminum in the future. TIGs are nice but with how often i weld (every day for 1 or 2 weeks on a project then I'll set it down for 6 or 8 months) its hard to justify the cost. The oxy-acetylene required no infrastructure also provides other services in my shop (damn the rusty bolts). When I bought my outfit I had no electrical in my garage except a light. I'm still waiting for the old man to give up his old Lincoln buzzbox then I'll be set!

Bob is old school...One of the best in the business!

After all the years I've been using a torch to cut (about 54 years) I learned some new stuff! One can always learn something new by watching someone else. Thanks! Richard

I thoroughly enjoy watching Bob’s video’s. Great workmanship, clear informative instructions with a touch of humour.

Been welding in the construction equipment repair field for 30 + years and really enjoy and learn something neat or a reminder of something I've forgotten from all your videos. Thanks , Great instructor

@leebarnhart9725

5 жыл бұрын

s w ....You've been out in the real world. Give me a cutting torch, a 350 amp. transformer stick welder, a broken rock bucket over a mig or tig glue job any day.

We're only human Bob the video was still great, Thank you for all you do.

Bob, your delivery of the subject matter is spot on. I do miss when you guys don't do any out-takes though.

@Welddotcom

5 жыл бұрын

We still do them. Just so happened that when we filmed this video we didn't have anything for the blooper reel.

@Welddotcom

5 жыл бұрын

check out the outtakes on the recent video "7018 overhead"

@farmalltomf

5 жыл бұрын

just did. Too funny. Man Cub is a great sidekick for Bob. I was a trainer for the company I worked for, and I loved poking the good trainees in the ribs. Makes for a great video when you couple solid content with good natured fun with the student. Great combination.

I cut beams for a living for a big trailer company we use plasma cutters and jugs but free-hand some things like going in to the curve of the beam and piercing out of the back end then use a block to cut down the beam. Still looks very similar to how we do things. Great video!

Seeing this great channel multiple times gives the opportunity to see an awesome teacher multi-times.

Bob is the best ! I am a professional equipment mechanic, and I weld and torch a lot and enjoy your videos. It is nice to see the similarities in your techniques ..

@Welddotcom

9 ай бұрын

Thanks 👍

Great video, I used to work in a structural fabrication shop, I did a lot of torch cutting on I beams, it was fun, I enjoy torch cutting in general...

Even though I'm in canada learning to weld Bob taught me alot just from watching his videos

The best way to learn is watching a pro. You made it look so easy. I bought a plasma cutter as I never had much success with the Oxy trying to self learn. Did not have Internet 30 years ago.

That is how a ole fella showed me how to cut I beams. Good stuff

I like your professionalism and laid-back attitude, you make a great teacher.👍👍

Great video Bob! Easy way to tell the W beams from the I beams is the W’s don’t have tapered flanges. 👍

Hey Bob sometime you need to show us sometime how to build a burn bar for torch work

Really helpful video Bob. Particularly where you show how to transition from the web to the straight cut across the beam. Best Regards Sarah

Great video, demonstrates mastery of oxy-fuel cutting torch, which is educational to us torch novices. This demonstration shows some serious fabrication skills. Cutting thick steel can be intimidating.

Great work. I like how your starting to bring in structural steel and it's practices.

You're the man, Bob!

Nice. I've been hanging around waiting for this vidjeo to get posted properly.

@Welddotcom

5 жыл бұрын

Took us a little longer than we hoped, but we got it all figured out. Thanks for hanging around.

@MrLucidity

5 жыл бұрын

Thanks for uploading! This channel is awesome

@Welddotcom

5 жыл бұрын

Appreciate the support.

One of the best oxy cutting videos I've seen. Video quality is outstanding. I don't do this often and I need a refresher when I do. This ones a keeper.

One of the best... thanks for sharing the details of the setting of regulators....

Great vid!

brilliant! never saw that method before, made it look easy bob!

Thanks for the awesome video I don’t really do a lot of oxy fuel cutting and don’t know the settings to set at and it’s helpful when you show how to set it and check everything going over all the steps even when you showed them in other videos thanks again great video 👍

Great pointers for us just getting started. Thanks

Nobody is perfect buddy looks good even if you made a boo boo lol. I am not a welder yet i am trying lol. I am a landscaper just mowing and i still can screw a up a straight line lol . Everybody makes mistakes thats how we learn right . Thanks for telling me about weld.com on fb people really like helping new bees . Thanks Daniel

Thank you for this. I have a couple of I beams I need to cut, smaller or thinner but used as supports f or solar racking. I got the extras from a job and was going to try to d*ck around with my band saw and a cut off wheel, but even tho I a lowely electrician can see your skill, my cuts will be junk, but I can practice now till I get it right with my torch.

As always thank you for sharing your knowledge with us

Thanks sir! Always like your videos!

This reminds of my first job working with steel I would cut huge I beams and H beams for 14 hours a day with a torch. Good times

@chrisfricker7025

4 жыл бұрын

Sounds fun, I love cutting with the oxy torch

Great video Bob, thank you. :)

I enjoyed it thanks for sharing

Great contents and very educational, thanks Bob

Great video. I-beam cuts can be intimidating

@muikthemad3933

5 жыл бұрын

🤣🤣🤣🤣😘😘

Good video Bob! Thanks 😀

Great how to, keep it going !

Thanks Bob

Great lesson, thanks! Can you please do a follow-up video to compare other options to make this cut? I want to see how a cut-off band saw does in speed and accuracy. Maybe compare a hand-held band saw also?

Nice cuttin Bob clean, your right about using a helper it's helps when cutting.

I would like to add a tip that has worked for me plenty of times. When cutting I-beams with a torch, I found I like to cut the web first and then cut the flanges. It really helps not getting those notches in the face of the beam.

Good job Bob

I wish you made this video 4 months ago when I cut my first i beam lol

Yeah I do fab work and that's the best way to do it. I like your Channel reminds me of stuff I do. Thanks

Bob reminds me of my science teacher.

I'd like to spend a couole years with you just learning everything I could pull out of that pretty little head of yours lol awesome tips

Amazing! Good job! Another video of GREAT shots from the "camera guy"!

Nice work Thanks

Nice luxury having that little cheat for a straight cut. I’ve cut hundreds of them. Never used a straight edge yet. But then again as you know, when in the field there just isn’t enough time for that. Liking your videos. Keep em coming.

Thank you !

Awesome. Thank you sir

Great video! I’ve never seen how to avoid piercing the web! Thank you!

Old And Shakey Does Pretty Dam Good , I Guess You Think We Will Believe Anything !!!!

your videos are excellent! I like the way you tell me what you are thinking and why you are doing something a certain way. I would love to see a video on stretching an i beam or a piece of C channel like a truck frame I have my thoughts but would like to see how you would do it there is more than one way to skin a cat

Good video! Next you should show a mouse hole cut for a welder to do a weld through.

seems like you went constant speed on the second mid section cut? guess it was going smooth enough for ya not to need to slow down ,,great cut,,btw you have done almost all kind of cutting techniques using gas and arc,,would you ever think of showing thermic lance technique? hehe

Great vid. Now I wonder what system have more productivity in the field......oxi fuel Vs angel grinder or plasma cutting. Planning to get one o other option for my job

Hi Bob love the vids I haven't seen anyone post a video about stick welding gaps. Especially in position as in vertical up. Would u only be able to use a 6010 fast freeze rod or could you use any other type of rod for this application. I'm in UK so everywhere is just boxes of 6013 s hanging around. Thanks again bob!!

Nice 👍

Bob, thanks again for some time saving tips. Now, I'll be, hopefully, able to get my rework pile whittled down. Your flap wheel smoothed that beam face pretty quickly. What are you using for your flap wheels? Thanks!

Goll dang field dog mr moffatt.

Nice how you cut away from yourself so the slag from the kerf is not aimed at your feet !

Yeah propylene is the new acetylene,can you do a vid with some scarfing tips? Much appreciated.

Cool

Awesome videos, to the point and full of great info and tips.

Great video as always. I've noticed though, when switching cameras, there's a pretty severe reduction in quality. See the transition around 0:52. The closeup of Bob adjusting the torches looks very sharp and in focus. Afterwards, it looks fuzzy.

The eye level shots may be a lil fuzzy but those close-ups never disappoint. Bob may have to start hassling the camera guy again if he doesn't tighten up his three quarter shot game ; )

Great video, love the bread and butter parts of the trade!! What would you have done if you couldn't have flipped it over, you wouldn't over head the underneath would you, or would you shoot through from the top, hit web down??

@bobmoffatt4133

5 жыл бұрын

Exactly!

I was taught to hold the cutting flame just barely at the surface of the metal being cut when I was an Ironworker apprentice. You hold it quite high over the cut. I wonder if there is any advantage either way?

I cut a many a beam in my construction days !! I shake too BOB !!

I like the technique. I’ve butchered that cut several times.

Good day. I would post a few questions about aluminum welding naturally if I can. Thank you

Excellent video Awesome cut. Great technique. Superb... and very educational! Sweet

Great video, do you ever do any cutting with propane?

@bobmoffatt4133

5 жыл бұрын

Not much. Since shops use it, I don't.

Bro... you are damned talented.

Old and shaky.... I’m pretty sure your doing just fine there Bob. Thanks as always.

That was textbook!

the face time portion seems blurry to me but everything else is crisp and clear could just be my eyes but I'm watching in 1080p so yeah not sure what the problem is

@SuperchargedMustang5

5 жыл бұрын

I had that same problem

Do a plasma cut! (Or for fun twin carbon arc)

Im planning on building a steel building using i beams. How do you deal with angles and roof pitch?

Would you cut a piece of railroad track the same way, just curious, trying to cut that material for a friend is going to be a challenge I believe. Still undecided if I should us the gas axe or plasma.

Any tips on how to weld with 3/32nd Flux core wire

And got it only once, so I’m repeatting the complete video over and over.

thank for your educational video. i'd like to know if you can explain how do you make the straight edge used to cut with the torch and where do you exactly place it to cut . is that possible please ? thank you

@oxygen454

5 жыл бұрын

Peter Welder the straight edge can be made from a piece of 3/8 or 1/2 flat bar. I weld on round bar to the bottom to keep it up off the work piece. That also keeps slag off of the burning bar. The offset for a torch is normally around 3/16 from the cutting line to the burning bar. Measure and adjust as needed.

@pawes2266

5 жыл бұрын

don't cheat just keep practice I cut only free hand

@bogdan_n

5 жыл бұрын

Why, you will get expelled if you cheat? I think anything goes as long as you do the job neat and quick

@pawes2266

5 жыл бұрын

if use always straight edge (cheater) u will never get stady smooth moving hands same with tig welding only practice makes u really good . first few cut are bad but after while u getting better and better when I started few years ago old guy told me same thing and after few day/weeks my cuts was ok now after few years Is way easier and faster free hand cut

@bogdan_n

5 жыл бұрын

@@pawes2266 I agree with you that practice makes perfect, but i doubt that you can arm wrestle that torch after, let's say, 8 hours of stick welding in weird positions, and win. The ideea here is presenting a good beam cutting technique, not learning to wield a torch

Why only turn the acetylene tank on one turn? Might be something I missed in another video, just wondering.

When do we get a vid of u out on the golf course???

@champtree

5 жыл бұрын

NEVER! Bob doesn't want to show the "camera guy" whipping his a$$.

@Welddotcom

5 жыл бұрын

Camera guys golf skills would make Tiger blush

Mr. Bob... you make that look too easy,, I know it is not,, thanks for the lesson,,

Would a plasma cutter do better or worse than this torch?

What size tip for this

Is a plasma cutter any good for cutting I beams ? I've never tried it. Anyone?

How do the different fuels affect cut quality? At my workplace we are running natural gas with 00 tips, 20 psi of fuel, and 70 psi of gas. (Pressures are high so we can run large rosebuds)

@thatgoodnutt6764

5 жыл бұрын

in my experience you just have to run more fuel for the colder burning gasses or cut slower but the quality is the same

I have an old Harbor Freight torch that that hoses are leaking. What brand or type of torch do you suggest for a part time metal worker?

@fetus9281

5 жыл бұрын

Mark Holbrook victor

@markwholbrook

5 жыл бұрын

@@fetus9281 Thanks. I'll look for one.

@tubeonline629

5 жыл бұрын

Why not just replace the hoses? If the torch is ok.

@markwholbrook

5 жыл бұрын

@@tubeonline629 The torch works but is under powered for cutting over 1/2 steel.

Finally seen someone cut going away from their body like i do. Propane works better in my opinion great video yet again timeless talent.

How to weld thin rotted metal like for a vacuum truck with stick

Can you please continue this and show how to fit I-beams and weld them. I know there are different techniques, some cut into the web to get full penetration on the flange and some don’t. Can you share your ideas and experience?

@Welddotcom

5 жыл бұрын

It's coming out on Friday.

Why do you open high pressure cylinders all the way?

@bobmoffatt4133

5 жыл бұрын

Because of the type of valve.

@beachboardfan9544

5 жыл бұрын

Thanks Bob 👍 For anyone else interested I did google this after posting the question and came across this Virgina PSA type of article. Apparently high pressure cylinder valves have a double seat which takes the cylinder pressure off of the valve packing, so not opening the valve fully may cause it to leak. www.dmme.virginia.gov/dmm/PDF/TRAINING/REFRESHER/MaintenanceRepairTopics/AR-oxygen-acetyleneuseandsafety.pdf

Why do we open the oxygen valve fully instead of one turn like the acetylene

@daviddemoise3526

5 жыл бұрын

Joel Edwards it’s a double seat valve, needs to be opened all the way to prevent leaks.

@joeledwards6412

5 жыл бұрын

David DeMoise thanks for the explanation. The seniors at my job gave me a hard time when they saw me setting up and fully opening the valve of the oxygen. I couldnt justify why i did it other than thats what i taught. Now i know

@davidmarquardt2445

5 жыл бұрын

And with the Acetylene you only open it partially so you can quickly turn it off in case of a flash back. True, nowadays you have check valves and flash arresters on the torch (or should have) but they can fail too. That tank valve is your last chance to prevent a explosion.

cut a circle hole in the in the "throat" or "web" then cut the top and bottom of the beam, much less chance of making a poor cut