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Old 06-29-2003, 06:09 PM
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Arc welder ~VS~ Mig Welder

Hey yall I dont have a mig welder. My dad has an ark welder in his garage. Whats the difference? Im thinking about buying new bear claw latches for the pinto and woundering if I can use ark welder instead of the mig.

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Old 06-29-2003, 06:21 PM
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arc(stick)uses a fixed electrode(rod), you feed it to the work. the rods have flux in/on them, creating a sheilded environment for the arc to occur in..... regular atmosphere (air) has impurities that cause problems in the actual weld itsself( excess splatter, crappy looking beads), hence the flux.
mig uses a variable electrode(wire), you pull a trigger, it feeds itself to the work. mig uses argon/co2 mix to create its inert field..
(no welding infront of heavy fan or outside on windy days)

mig has less spatter, generally produces a cleaner weld.....
if your good with the stick welder, you'll be fine.
just make sure you match your rod with the work your doing.....

Last edited by crazy larry; 06-29-2003 at 06:28 PM.
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Old 06-29-2003, 06:37 PM
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I was being told the other day by some folks that the arc welder will eat right through that metal though is that true?
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Old 06-29-2003, 06:39 PM
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if you dont set the amperage just right and use the correct rod.....
too damn many variables in stick welding for me, that's why i bought a sissy ol' mig
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Old 06-29-2003, 06:49 PM
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Thanks for your help
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Old 06-29-2003, 08:58 PM
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You have to be really good to weld sheet metel with a stick.
really,really good.

Wire is the way to go.hth

Troy
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Old 06-29-2003, 09:27 PM
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I have a trusty old Lincoln buzz box (stick welder) I have used for over 25 years. Also have had a mig for the last 5 years or so. Both have their place. I have done miles of thin metal welding with the stick welder. Just get 1/16" or 3/32" rod and use low amp settings and burn through won't be any worse than with a mig. Concentrate the heat on the hinge if it is heavoer metal.

I think the rod you want is 7018 ( I get them mixed up - there is a number designation for reverse polarity and one for straight polarity. Ask for the 70XX for straight polarity). The 70XX series rod has iron in the flux and lays down a very pretty bead, almost spatter free, with little practice. Whole key is to use small rod and low amp settings for light material. But that is just common sense!
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Old 06-29-2003, 11:04 PM
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I think ima print this one out. Yall are a big help thanks
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Old 06-30-2003, 12:10 AM
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Sounds like a winner to me.
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Old 06-30-2003, 05:18 AM
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Good tip is to take a welding class. Teaches you alot of things, even at highschool level. (I used to know what each number stands for with rods)

Gas welding is my favorite.... so smooth, so easy, all you gotta do is set your flame and you are good to go. Plus FIRE!!!!!!!!!!!!!!!!!!!!!
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Old 07-01-2003, 01:46 PM
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Quote:
Originally posted by stonedchihuahua
Good tip is to take a welding class. Teaches you alot of things, even at highschool level. (I used to know what each number stands for with rods)

Gas welding is my favorite.... so smooth, so easy, all you gotta do is set your flame and you are good to go. Plus FIRE!!!!!!!!!!!!!!!!!!!!!

Good point. That is where I learned to weld- at a junior college welding class. Took two semesters. Sometime remind me to tell you about my classmate (actually became my best-man) who arc welded in class with his shirt off to improve his tan. We welded in little booths so the instructor didn't see.
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Old 07-01-2003, 03:06 PM
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Actually iv been looking but im 16 and most of them are at colleges. I might just buy some books and start reading. Unless yall think they wouldent mind having a kid in the "colleges shop"
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Old 07-01-2003, 04:13 PM
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Hey, if they will let you in (don't know the rules in your state), go for it. Life is too short to worry about what other people think. When you go looking for your first real job, things like that look really good on your resume - the ability to be a self starter and overcome obstacles is a critical job skill.
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Old 07-02-2003, 09:32 AM
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Start by gettting a piece of scrap metal the same thickness as the metal you want to weld on like a fender of hood or something.
Make very short spot welds then increase your "on" time until you get good at burrning holes thru the metal. That will give you an idea of what it takes to get a good weld without burning holes in the sheet metal of the car because once you burn thru its a lot more difficult to fill the hole. It can be done with an arc welder with the right rod and setting, but its is easier with a mig. I had problems getting the right settings when I first got my mig, but now I find it easier on sheet metal. Just got an auto darkening helmut last mo. Had been using my busted up 35 yr old helmut since high school. Soooooo much better!
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Old 07-08-2003, 12:26 AM
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Hey yall been a while my keyboard got chewed up by my punk lil puppy. My dad and I were going over ideas on tha pinto out of the blue " I havent even welded yet " he said id rather see you braze then arc weld. Which would be better for simple body mods? Thanks for all the help guys :p
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