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This is by far the best explanation of this topic I've ever seen. Keep up the good work.

First video I've watched where someone actually explains this properly, been struggling with getting the finer details of learning to tig weld ally and this has helped massively, thanks mate

Thanks for the in-depth explanation like always Justin! Glad to see you back we all know you had a very busy summer but definitely looking forward to the next video! Definitely missed you! Keep it up brotha 🤘

Great video! It’s funny, I pretty much always use a standard collet body and 5 cup on aluminum. Earlier today, I had some aluminum to run and there was a gas lens on the torch so my lazy self threw on a 7 cup and let’er rip. Half way through, I thought this works pretty good.

Holy crap!!! That was super informative. I started experimenting with #12 cups with a gas lens on stainless steel and thought it would be good on aluminum. Sir, I am super grateful for the tip!!!!

Great Video. This actually solves a problem that I've been fighting. I never considered that my cup being to large was causing my issue. Excellent information. I noticed the issue but wasn't sure how to correct.

Hey welcome back Justin been missing your videos! Love the how you explain everything exceptionally well keep up the great work!

Great explanation of what I have experienced running an 8 gas lens.

Being a self taught tig welding rookie, I learn so much from your videos. Thank you for the awesome content.

Great video. I've been using a #7 gas lens since forever and I can't even remember why anymore. It has always just worked form me. This has motivated me to try a #5 and see what I can see. I completely understand the "boring" technical theory here which I would like to see in practice for myself.

Great video! I was talked into a large gas lens a couple years ago. After watching this, I threw my original set up on my torch with a #5, and laid down one of my better aluminum welds.

This was an exceptional explanation man, thank you. You have that rare ability to explain stuff so regular humans can understand, thank you.

You were/are the gateway to my welding life. Thanks so much man for giving me the joy of knowledge to create

Happy to see you back! I’ve learned a lot from you Justin. Thank you.

Excellent video! These are things I already knew, but the reverse dartboard explanation was just great; and I’ll definitely be stealing that when I have to explain this in the future👍🏻👍🏻

I've been Tig welding for many years and never really put thought into the cup size for aluminum. Your explanation makes perfect sense. Thanks for taking the time to explain to us mortals!!

such a simple concept that can completely change the look of your welds. ive always wondered why i kept getting more and more cleaning action on my welds despite having bigger cups and higher CFH lol well now i know!

You have just explained some of the problems I'm having. Thank you. 👍

Thanks Justin, this really helped a lot. In areas where I absolutely can’t get rid of gaps, I’ll run a #7 gas cup and stuff filler, but took your advice and the standard 5 is such a tighter and better look. Always appreciate your videos. Thanks! 👨‍🍳 💋

Great video. I only have a stick start DC tig so I can't do aluminum, but these vidoes help me to know for the future. You are top notch for teaching videos.

I’ve watched 2 videos so far and have learned more then I have ever about welding in the 2 years of experience I have.

I love the short and sweet videos packed with tons of info!

Glad you back. Merry Christmas to you and your family

While I always enjoy your videos, this one was especially informative! Thank you very much! Please keep them up!

Thank you for sharing! I usually use the #8 cup. I'm going to try the #5 tomorrow! 🤘

Very good and informative video. Giving the theoretical explanation and examples goes so much further to explain.

as always very informative and straight to the point! thanyou so much you are literally the best welding teacher on the net by a long shot!

one of the best aluminum welding explanations I've seen. bar none. what was great is that your explanation matched my observations in the last month where i tried a number ten furick cup.... needed twenty five cfh... random arcs... etc. thought i was doing something wrong. also noted, like you said, i increased the stick out... helped. but needed an additional 2-5 cfh... so by the time i get it running right... it sounds like a hissing snake spitting money during post flow lol... awesome to see you making new vids... thanks!!!

Glad to see you again.

Again, excellent explanation and makes total sense. Keep all your tips coming!

Heck yeah Justin!!! Keep em comin still Savin up for that prime weld

I could and HAVE watch ur videos all day lol. So much good info and learning. Keep up the great work man!

As usual, a very clear and excellent lesson.

So good for a beginner like myself. Top shelf production too!

thanks for clearing that up.

Thank you for this! I always used way to big a cup and now I see why I had problems..

This was a most excellent and helpful discussion. Thank you for taking the time. PS just ordered the stubby 5 non-gas lens package.

Great stuff Justin... thnks buddy I really appreciate the sharing of your knowledge... Some day I'm hoping to make the short trip up to take a class from you and finally meet you....

These videos never disappoint me, who agrees?

We've missed you! Welcome back. Great video.

Always informative! Thanks Justin!

Thanks for all the information on all the Videos!!!

I find myself watching this video, without any preexisting plans to start welding. I don't know how I got here, still I have watched several of your videos. I don't have any reason why I need to weld, still I'm trying to persuade myself not to buy a TIG/MIG-welder... But it is tempting! I think the way you present the subjects and the format you choose contribute to that success. So keep up the great work!

Makes total sense now! I was using a Fupa cup on stainless but then switched to alum and noticed it was very hard to put down good welds. Now I know why, I'm going to try this later today!

I’ve been combo welding for 17 years now. Struck my first arc when I was 10 years old. But This is the most detailed explanation video I’ve seen. Makes me wonder if I should be a KZfaqr lol. Well done man. Keep burning and earning

Awesome thanks for explaining, i was using a #5 and got my weld ok, but was told I should be using a #12 cup and have been struggling with it ever since (I have about 15mins total tig welding with the new machine). ill switch back to the #5 now thanks!

Glad to see you back Justin.

Nice vid, i had a hard time figuring this out when i first started

great explanation, I had never heard before

Great tip! I have been using a #8 cup with gas lens and my welds look just like yours with the same gear - well close anyway. Filet welds especially are difficult to get into the root without excess width. I'm off to the shop to try the #5 cup and standard body with high hopes.

Best cup explanation on youtube . Ty sir.

Thanks for the info! I was just wondering about this the other day, guess I need to get some new cups!

Awesome table set up there. Thanks to Nick for getting that aluminum up off the table so I wasn’t so hunched over last week in my class.

Holy crap! I never knew! This all makes complete sense. I never would've thought of that. I've always used a #8

Well explained …. That was my problem from the beginning. Thanks man 👍🏻

Thanks Justin, awesome as always

All I can say is thank you! Simply explained!

Makes perfect sense & like you said in other video's, stick to the basics that have been tried & true since the beginning.

Interesting - I've been running a #6 at 15CFS Argon on 16gauge coupons, but I'll try a #5 today and see how it works out. Thanks :-) solid explanation.

Justin , always great stuff.....cheers from Florida, Paul

Natural teacher. Wish I had him in high school.

I'll try this instead of my no7 standard cup then. great video

Thanks Justin Great info

Interesting. I've ended up with a number 8 gas lens as my preferred setup, mainly because I like the extra coverage as it helps stop impurities, especially when working with old bits of cast. I'll try the 5 again though, it's been years since I did.

Order some more metal from Weld Metals the other day. Just came in the mail yesterday. Trying some of the thin metal this time.

For the love of all that is weldable, please keep doing these aluminum tips and explanation videos.

I like your style! Simple and thorough. Subscribed and thumbs up.

That explains why my 6 looks better at my shop than my weld at a friends with his 8. I need a smaller yet obviously. My buddy's welds all look like your #8 examples. Thank you sir.

Couldn't agree more. Cup size has always been very important to me as well.

Top notch explanation.

another great video justin, thanks pal

This is a really good video, thanks!

Great video! Thanks for sharing. I would live to see this setup on a CNC. That way there is absolutely NO difference other than the cup. I'm sure yours is close but you can tell the dip was different at a minimum. Regardless. Thanks!

Just started to Tig aluminium it's been 3 days adjusting amps, AC Hz, AC balance I'm getting better but it wasn't till I put a No 5 cup on that I saw improvement. Thanks

I make hardtop cabins for 30 foot aluminum fishing boats, and I generally use a #6 with a little bit of stickout for TIGing grab handles, corners, etc. Seems to work alright. Used to use a 5 but it just never turned out quite right.

Man this video came at the perfect time!!!

I was running a #6 on 15cfh argon. I'll switch it to a #5 and 12cfh and give it a whirl. Save a few cfh... literally, lol. My issue was dirty aluminum that I got out of a scrap pile. Cleaned it with a stainless steel brush and some acetone but was still getting black shit in my weld pool. I put my torch down and put in an order for 40 coupons from Weld Metals Online. It's on it's way. Thanks for the tip!!!

A great video , lots of information shared.

I think it’s always useful to know the why’s and how’s and not just the rule of ‘if-this-do-that’

Thank you very much for this informative video.

Thanks !! I just learned something ! 🤘🏻😎🤘🏻

Really good video!

With the help of your videos I was able to get proficient enough with my TIG setup to custom make a twin turbo kit for my 350z. Cheers.

Great video thanks for the input 👍

I've tried all the cups, there is about 2mm etching difference between 5-12 with the stubby gass lense however if you turn the amps up the smaller cups don't cool the weld enough so my findings are if you use more gas you end up with a shinier weld which I'd prefer over 1mm of etch line

This video answered a lot that I always wondered about welding aluminum. Glad to see a TFS video again!!

i simply cant run a Ally5 as good as 8 pro glass. especially on outside corner joints where gas coverage is harder to achieve. i could care less about a etching line cause in a few months it all looks the same.

Awesome, thanks for the knowledge dump!

well done.... thanks. I love a #5 on aluminum

Thanks for all the great content. Could you make a recommendation on a tungsten sharpener? Thanks again!

Really good. Thank you

Lol... I had no idea that a #5 or #8 was the preferred cups by seasoned aluminum welders... I've been welding for 20+ stick, mig, fluxcore... 4 years ago I returned to a old job and noticed a lincon 370 precision tig machine just collecting dust. So I hooked it up and became the aluminum welder lol, long story short I run a 1/8" gas lenz with a #8 cup just because it felt right😂

Good to see you posting again - I knew you were still above ground from your feature on Rob Dahm's channel a week or two back 😎 How is the truck build going?

Great information Thank you

Exelente videos! Gracias por compartir!!!!!! Sería bueno que los traduzca a español! Un gran abrazo desde Argentina!

Thank you for the information, YOU have been missed....

Holy shit! You’re back bud! 🤘🏻

thanks! good stuff.

Depends what your gonna do though , if im welding something really thick on crazy high ampa that small 5 cup is gonna glow like crazy