How do they "Measure" Welding Capacity?

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Morning everyone...I've got a potentially dumb question to ask of y'all...Ever looked at a welder, especially a wire-feed machine, and seen that its "Rated" to weld 1/4" material for example?How IS is rated?One might think a fillet weld... I bet I could get a nice big fillet weld with a 110 volt mig on 1/2" plate if I moved slow enough... It would be a big, ugly, useless weld, but I bet I could hit 1/2"...Anyone know what type of joint they rate machines on, or how they do it? I've always wondered that...Thanks in advance, guys [Account Abandoned 8/8/16 Please Do Not Attempt Contact Or Expect A Reply]. See you on YouTube! -ChuckE2009
Reply:well I've always thought in the 1amp per .001" for most welding, It doesnt seem to hold true for mig machines though seems to me they rate them at 1amp per .002 so a 140amp machine tends to be "rated" for 1/4" (140a peak, probably closer to 125 for sustained output) That just my guess on things
Reply:I suppose it would be 1 amp per thousandths of an inch single straight stringer bead,flat no bevels for full penetration.The duty cycle of a 90amp welder at full tilt is probably only 10-20% at best,the 90 or 100 amp rating is at 15% usually but they will run hotter for a very short duty cycle.Were you going to repair the hitch on a mobile home or something.
Reply:the weld machine manufactures build it. then test it. then say well it welded 1/4 thick steel " with no problem lets rate it at 1/4 inch. how does it do with 3/8? not so good. yep lets rate it for 1/4 that will be good enough for the guy who wants to fix his broken lawnmower in his garage.   for us that use welding equipment for a living we ask will this equipment burn 1/4 7018 rod?  will it burn .045 dual shield wire? can i run my air carbon arc gouge from it? is it big enough to run 3/8 carbon arc rods? will it last? O it is rated for 1/4" better put that in my garage for the next time my kids breaks his bike. good thing it plugs in to a 110v outlet.jorian1959 lincoln sa 200/yanmar4tne86miller bobcat 250ntmiller 180 easy set
Reply:The capacity of a welding machine Is is based on amperage and voltage and duty cycle. saying quarter inch capacity is misleading. it all depends on Joint configuration type of material being welded and position of weld . so I hope that answers your question?Miller Trailblazer 280 ntS 22 p 12 suitcase wire feeder Miller high frequency box dynasty 200 Millermatic 252 Millermatic 211 Miller XMT 300 Miller spectrum 2050 plasma cutter Cutmaster 42 plasma cutter. Miller dynasty 350
Reply:All welders work and can weld anything the only problem is low heat imput in the weld zone and preheat and interpass temp are critical to weld quality. You can hang on with your 85amp. 023 or 1/ 16 rods and try filling it up or join the real world with. 045 and 5/32 min and join the real weld.Build bridges and buildings and weld with 900 amps twin 5/64 wire and put down 250 pounds a day.
Reply:Originally Posted by LanseI bet I could get a nice big fillet weld with a 110 volt mig on 1/2" plate if I moved slow enough... It would be a big, ugly, useless weld, but I bet I could hit 1/2"...
Reply:Originally Posted by jorian... yep lets rate it for 1/4 that will be good enough for the guy who wants to fix his broken lawnmower in his garage.
Reply:C'mon guys!Lets be real!80% of what the "Hobbiest" welds is less than 1/4"!Anything more, then they hopefully have a buzz box?