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Welder question

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RonMC

04-11-2002 23:23:13




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Okay all you experts - I'm not a total beginner at welding, but I'm looking at arc welders and want to be able to weld up to 3/8 plate, not a large amount, but that's about the heaviest, plus do implement and tractor repairs. I was looking at a 225 ac welder, and a 225 ac/dc+/dc- and would like to know what if any are the advantages to the second (more expensive) unit. Would it give me capabilities that I might kick myself for not having somewhere down the line ? I have a small arc unit that works ok for sheet metal, etc, plus oxy/acet. Thanks for any advice, Ron

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llamas

04-12-2002 03:55:49




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 Re: Welder question in reply to RonMC, 04-11-2002 23:23:13  
An AC-DC welder will allow you to correctly use a far wider range of available welding rods, many of which are specifically designed to achieve the advertised results only when used with DC current. While the range of rods and procedures that are available for the classic 225 amp AC welder is actually growing, AC-only is a significant limitation and one you might not want to tie yourself down with. If you're going to be doing tractor and implement repairs, there is gooing to be OOP welding and in most cases, that requires a DC rod used on DC.

As regards your 3/8 plate question, remember that the 225 AC/DC welder (and I presume you're looking at the Lincoln) makes only 125 amps of DC current. That's not enough, IMHO, to work with 3/8 material reliably, and you'll always be running it at the top end of its capacity in the DC mode. I think I'd be looking at a unit in the 200-amp DC class.

HTH

llater,

llamas

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RonMC

04-12-2002 22:11:45




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 Re: Re: Welder question in reply to llamas, 04-12-2002 03:55:49  
Thanks llamas, that answers a lot of my questions - in fact probably all the questions I'll have until I get smarter. I'll look at a little higher amperage, Thanks again ! Ron



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