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I have some 7018ac rods and have a Lincoln 225 AC welder and also a Miller Bobcat 225 AC/DC welder. I actually have three but one is a mig. Can I use ac rods with my dc welder and use dc rods with ac? What problems will I likely encounter?
Reply:I welded with my sa 200 using some ac7018s and they had a crappy arc characteristic. It may have just been cause they were cheepo forney rods or something else though. Just give em a try and see what happens.My vintage equipment 1957 Lincoln sa 2001980's Lincoln 225 AC1952 F-2 ford truck1957 F-250 ford truck
Reply:You can use AC rods on an AC/DC machine set to DC polarity, no problem.You will a hard time using DC only rods on an AC only machine.I currently have a box of ESAB 7018AC rods that I've been using with my machine on DC+ polarity. They run fine.You will have a harder time running 7018 DC rods on an AC buzz box machine.Last edited by snoeproe; 07-31-2009 at 10:14 PM.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Saw some DC7018 run on a nice inverter machine (Lincoln ca 300 if I remember the model) set to AC current, and got a chance to run them too. Ran beautifully. Strange mosquitoe sound as you ran the rod. I don't know how the guy tweeked the machine,but it was pretty impressive.I fooled around with the same thing on my not as nice machines, and didn't get near the results, but it's doable at higher amps AC. I think it's a matter of getting used to the characteristics. 7018 will run on both types of current"Any day above ground is a good day"http://www.farmersamm.com/
Reply:I believe all 7018 rods are approved for either AC or DC use. However, they run better on DC+.Your 7018ac rods are especially made for use with buzz box welders, which don't have as much "oomph" for striking an arc compared to "real" welding machines. 7018ac's strike and maintain an arc much easier than ordinary 7018 rods. You can run them on either AC or DC+. I recently tried a few 3/32" Lincoln 7018ac rods, using DC+ on my Hobart Stickmate. At first I thought they were crap. When I ran it the same way and at the same amps as ordinary 7018, the bead was narrow and incomplete. The puddle seemed to freeze much faster than ordinary 7018. Eventually I turned the amps 5 - 10 higher than ordinary 7018, and slowed the stick speed way down. Then the 7018ac started making fine beads.Now that I've found the "sweet spot," I like the 7018ac rods. They strike easier than ordinary 7018, and they seem to freeze a little faster, which makes it easier to fill gaps and weld out of position. I would suggest you use 6011 and 7018ac on your AC machine. The AC machine can use ordinary 7018, too, but it may be more difficult to strike. Your Bobcats can run just about any electrode, but you'll probably leave it set on DC+ all the time and forget about AC unless you are dealing with arc blow. |
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发表于 2021-8-31 23:45:54