Need guidance/suggestions on TIG collet & electrode sizes for getting started

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I've been Oxy-Acet welding since '70's, MIG & stick since '80's... and I'm finally jumping in with both feet into TIG.I bought a 350A water cooled 18-25 torch.  It looks like a gas lens collet body is the better way to go, but I haven't a clue as to sizes of electrodes, and type of cups, (pyrex v alumina).  Here's a chance to wildly spend someone else's money, if they wanted to be able to weld SS, aluminum, at the least. Likely, once I get technique down, I'll weld steel, instead of using the MIG.Here's the deal, my wife works for a VERY large US industrial supplier, and I get to buy via their Employee Purchase program, (cost + 10%). At the prices I'm looking at for Gas Lens Collet bodies, collets, etc..., I was tempted to just buy one of each size, but that just seems wasteful, as I'll likely not use most of them.I've got a MIG/TIG/Stick box with a bad relay given to me; It kicks out when it turns on, I wanna say it's a 325A box. It's from that (Lincoln-based?) company Rent to Weld, or something like that.  I also have a small MIG box, with a bad wire feed motor. I figured I could get it to make a small arc.  I also have an Esab 250A box someone has gave me, last year, during my 'Covid & Cancer' period, (kinda like some European painter had their 'Blue Period'), 2020 was Covid in Jan, turning into HPV throat cancer in the Spring. But a couple of Summer surgeries & some experimental meds to give me a super-immune system against the cancer, and I'm just about 90%. That's pretty good for me, 'cause I normally only run about 80% duty cycle.  I'm gettin' too old, and too cantankerous to kill off, yet; I got **** to do, still.So, look at the situation as if I got a box to push an arc off the electrode, because if I don't already have what will do the job, something will come my way.  Just how it works.  (If anyone in the NW wants a BIG MIG/Stick Lincoln 3 phase w/ a divorced Wire feed gun set up for 0.048", I'll give someone a 'too good to refuse' deal. It's big and heavy, but is on a real nice wheeled cart.  I've got manuals I can send to you.)  I don't see myself doing a bunch of thick SS, or even thick alum welding; last time I really had to weld some SS, I used my gas torches, flux and some old bicycle spokes. It was just roof flashing, anyway. I'm looking for some guidance and suggestions on what to buy so I'm prepared, without having to go to a local supply shop.If anyone has experience crimping welding type hoses, I'd love to pick your brain, since I have a crimper needing some dies, but I'm gonna have to make them.I appreciate anyone willing to share their TIG know how and experience.  I'll do what I can to give back, as I can, to the community.Thanks, in advance,GeoD
Reply:While I don't know part numbers for your torch, I'll say 1/16, 3/32 (most) & 1/8 will put you in good stead. I'd skip the standard stuff & go with only gas lens. Depending how big your welder is, you might skip the 1/8". Cups: I don't have any Pyrex cups, but I'm tempted. Mine are all alumina. I use a #7 cup most of the time, having a #5 might come in handy, and a #12 for stainless.Tungsten: 2% lanthanated will meet almost all needs. Thoriated is arguably equal to lanthanated, but has very low level of radioactive content. If you have a sine wave welder, some pure for aluminum is nice. I'd order a ratio of 3 to 1   3/32".Don't forget collets. Again 3 to 1.An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.
Reply:

Originally Posted by Willie B

While I don't know part numbers for your torch, I'll say 1/16, 3/32 (most) & 1/8 will put you in good stead. I'd skip the standard stuff & go with only gas lens. Depending how big your welder is, you might skip the 1/8". Cups: I don't have any Pyrex cups, but I'm tempted. Mine are all alumina. I use a #7 cup most of the time, having a #5 might come in handy, and a #12 for stainless.Tungsten: 2% lanthanated will meet almost all needs. Thoriated is arguably equal to lanthanated, but has very low level of radioactive content. If you have a sine wave welder, some pure for aluminum is nice. I'd order a ratio of 3 to 1   3/32".Don't forget collets. Again 3 to 1.
Reply:For my use 3/32" is the go to. I also have 1/16" and 1/8" for rare occasions, which are nice to have but you can get a lot of range with 3/32" unless you are doing tons of high amp work.  Look up a chart on tungsten size vs amps, like the miller chart.-DaveXMT304 with: 22A Feeder, or HF251 Hi Freq DC TIG air cooled
Reply:Wp 18 takes the same consumables as an aircooled "17" torch. Get s stubby gas lens kit for 3/32" 2% lanthanated tungsten, and a regular gas lens kit for 1/8" 2% lanthanated tungsten and you are good to go. TecTorch is high performance, made in USA, but only can get from your local weld supply special order. Worth it. http://www.tectorch.com/http://www.tectorch.com/PDF/Parts%20...%20OPTIONS.pdfhttp://www.tectorch.com/PDF/Parts%20...%20OPTIONS.pdfhttps://midwesttungsten.com/tig-weld...rodes-10-pack/Last edited by shovelon; 07-08-2021 at 01:40 AM.Weld like a "WELDOR", not a wel-"DERR"

MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:Following. Good info.Miller Syncrowave 250Millermatic 251Millermatic 180Thermal Dynamics Plasma Cutter
Reply:

Originally Posted by shovelon

Wp 18 takes the same consumables as an aircooled "17" torch. Get s stubby gas lens kit for 3/32" 2% lanthanated tungsten, and a regular gas lens kit for 1/8" 2% lanthanated tungsten and you are good to go. TecTorch is high performance, made in USA, but only can get from your local weld supply special order. Worth it. http://www.tectorch.com/http://www.tectorch.com/PDF/Parts%20...%20OPTIONS.pdfhttp://www.tectorch.com/PDF/Parts%20...%20OPTIONS.pdfhttps://midwesttungsten.com/tig-weld...rodes-10-pack/
Reply:

Originally Posted by Oscar

My LWS's have no idea about TecTorch products, so I special order from Weldfabulous.com
Reply:TecTorch makes nice stuff. I use their WT-20H on my Sync250. I think the company was started by a guy who used to work for WeldCraft, who made improvements to the WeldCraft designs and incorporated those improvements into the WeldTec versions.
Reply:Thanks to everybody.  I'll have to take some time to go through all of your helpful advice, in more detail, but in a quick read, it looks like just what I need, and most all of you are in the same ball park, which validates the recommendations, IMO.@OscarI was reading about porosity in brass components, somewhere, just a few days ago, and it was not related to welding.  It's a problem a with cheaper brass casting(s) process.  I don't recall the details why, but it can be a by-product of cutting corners during the process.As far as the torch body, it is a bare Radnor 18, the only thing it came with IS the insulator.  I'll try their gas lens collet bodies, but keep my eyes open for porosity problems.  Should be a way to test for the problem, I'll have to give it some thought.===My wife works for a large US industrial supplier, like I said. They sell Esab TIG torchs & components, and their private named line, (they have a couple dozen private lines, across the spectrum of products).  What I found in the 10+ years she's worked there, is while their private named lines are sometimes the least expensive, some are hidden gems.  One of the company's stated goals, internally, is to offer a range of price points in any given category of products.  When they can't source an already produced brand to hit the price point, they outsource it, and give it a house label.They don't like to tell anyone who makes their house brands, but I've figured out a lot of them, just because of familiarity with the equipment, and because of Google's habit of flooding you with ads AFTER you've bought something.  I bought a house brand set of simple wire crimpers, (uses the body of 6" diagonal cutters).  I few days after I'd been looking at it on their site, I had an ad for it pop up at some other site.  Then, right next to it was an ad for Kleins just like it. When I saw them side by side, I did a double take; they were identical.  I checked the Klein website for specs, and the only difference was one was in fractional dimensions and the other was in decimal inch dimensions. I got the house brand for about a 1/3 of the Kleins.  (This one I can tell, because they stopped selling the house brand crimper. Went to buy a pair for a friend, and they're gone.)So, when you see house brands at big suppliers, don't immediately reject them. Do a bit of research, and you might find a gem, in hiding.There are not THAT many US manufacturers of TIG torches, as I've come to discover.  There are a LOT of brand names which say they are US manufactured.  They probably are US made, but many are coming from the same place.  Air Gas bought Radnor, Radnor was named after the town their plant was in, Radnor, PA.  There's another brand I found which actually shows a manufacturing plant on their site, (WeldTec, I think). Not so for a lot of others.====re: welding amp levelThat's still an uncertain factor.  I've got a small 100amp DC box I'm gonna play with, since I can use it as soon as I get the torch assembled, and cooler built, (I have a small ice maker, (18 x 18 x 36" tall), that has a ice production problem, not related to the refrigeration portion, which is destined to be my cooler. I've fixed refrig & freezers for a long time; my step-dad was in the commercial side for decades, and I never had a chance to NOT learn about them. I've scrapped so damn many frig's and freezers in my life! Both commercial and residential.  Ice machines can be a nightmare when their ice maker mechanicals go goofy. It should make a nice unit, once I breed in a pump.I have those other boxes I mentioned in my OP. My goal is to get the torch and cooler set up, so I can do light stuff with the little box, get a feel for it, and some 'helmet down' time in, then figure out just what where I want to/need to go.All of your input will get me going on that road much faster than if I tried to figure it out on my own.Thanks, again, to all.GeoDLast edited by GeoNOregon; 4 Weeks Ago at 05:18 PM.Reason: paragraph out of place