I have not operated a TIG machine since I was in my early 20s (now approaching my 40s), and back then we had a shop manager that kept our parts available for us.
Recently, I purchased a TIG torch for an Inverter machine, so I will be limited to DC welding (no aluminum).
My TIG torch is the Lincoln PTA-17V, and won on eBay:How do I select tungsten?
Looking in Harbor Freight's catalog, I see 2 options for 1/16" tungsten:1) #93724-0 - EWTH-2 "1.7-2.2% thorium dioxide" 2) #93725-0 - EWCE-2 "1.8-2.2% cerium oxide"
What's the difference between thorium dioxide and cerium oxide? The price is the same. Is one for aluminum and one for steel?
Here is part 2: I have an argon/CO2 tank that I use for MIG. Since I do not intend to do a lot of TIG or MIG, I had planned to use this same cylinder for TIG welding. However, a guy at the local welding store said that I must use argon only for TIG welding and that I needed a separate meter for TIG welding than the meter I had for my MIG setup. I've never heard this! Is this true? I see meters on eBay that say they are for MIG and TIG, so I think the guy at the welding store did not know what he was talking about. Can someone verify this?