Punkskalar
Hugh's HandBuilt
OK, there are alot of people here who are a little bit misconstrued.
You CAN weld that frame just fine with a 135 Amp machine. I've built several roll cages and rock crawler chassis with just the same machine when I was yuounger. I own a 180 Now, and a 200 Amp TIG, but that 135 is always on standby. That said, the frames and chassis's and roll cages took major beatings and never once did we have a weld failure from using the small machines. Mutliple rolls, drop offs, crashes, etc...
Usually figure on 1 amp per .001" of material thickness for a single pass. So on these frames, you might have .125 tubing, needing about 125 Amps.
I ALWAYS weld with .025 wire, .030 gets too nasty for me and I don't like the amount of filler it requires. I like to use gas, but with flux core, using the .035 is just fine. With flux I like to weld HOT and use a slower wire speed.
Don't listen to all these guys that say your hardtail will fall off. It WON'T you might get a broken weld if you weld it extremely cold and get ZERO penetration, but that would be obvious. And it would take 5 or more weld to brake completely for the tail to "Fall Off" and you should keep an eye on ANY hardtailed frame for cracks and failures throughout the riding season...
This ENTIRE rig was built with a 135 Amp MIG, on Flux Core wire, outside in poor weather. It was barrel rolled several times, flopped once and slid down the road on the freeway, rolled over backwards, and beat off of every tree and rock on the South. No weld failures, but plenty of dented tubes.
You CAN weld that frame just fine with a 135 Amp machine. I've built several roll cages and rock crawler chassis with just the same machine when I was yuounger. I own a 180 Now, and a 200 Amp TIG, but that 135 is always on standby. That said, the frames and chassis's and roll cages took major beatings and never once did we have a weld failure from using the small machines. Mutliple rolls, drop offs, crashes, etc...
Usually figure on 1 amp per .001" of material thickness for a single pass. So on these frames, you might have .125 tubing, needing about 125 Amps.
I ALWAYS weld with .025 wire, .030 gets too nasty for me and I don't like the amount of filler it requires. I like to use gas, but with flux core, using the .035 is just fine. With flux I like to weld HOT and use a slower wire speed.
Don't listen to all these guys that say your hardtail will fall off. It WON'T you might get a broken weld if you weld it extremely cold and get ZERO penetration, but that would be obvious. And it would take 5 or more weld to brake completely for the tail to "Fall Off" and you should keep an eye on ANY hardtailed frame for cracks and failures throughout the riding season...
This ENTIRE rig was built with a 135 Amp MIG, on Flux Core wire, outside in poor weather. It was barrel rolled several times, flopped once and slid down the road on the freeway, rolled over backwards, and beat off of every tree and rock on the South. No weld failures, but plenty of dented tubes.