.035 solid wire usable in a 140 amp mig?
Tue, 31 Aug 2021 15:25:57 GMT
Another (possibly stupid) newb question: I just purchased a used Lincoln 140 Mig that was loaded with an almost full 11 lb. spool of .035 wire. I just assumed it was flux core until I saw that it was ER70S-2.Is this stuff even usable with a 140 amp machine? If it is I need to weld some 1/4" square tubing and some initial setting recommendations would be appreciated!
Reply:The tubing is 1/4 square, or the walls are 1/4 thick ?
Reply:Originally Posted by BlueweldersThe tubing is 1/4 square, or the walls are 1/4 thick ?
Reply:Originally Posted by belawAnother (possibly stupid) newb question: I just purchased a used Lincoln 140 Mig that was loaded with an almost full 11 lb. spool of .035 wire. I just assumed it was flux core until I saw that it was ER70S-2.Is this stuff even usable with a 140 amp machine? If it is I need to weld some 1/4" square tubing and some initial setting recommendations would be appreciated!
Reply:The upper limits of the .035 wire are well above the limits of the machine is all. Don't throw the wire away but when it's gone move back to .030.. The .030 solid is a better all around fit for the 140 class machines."The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:Originally Posted by dave powelson"some initial setting recommendations would be appreciated!"......ummm......geee...if it's not too much trubble...open the door of the machine, raise it all the wayup....and you'll see a big chart with all kinds of setting recco's. on the inside face of that door.
Reply:.035 is really too big for that machine.If you are welding up something that doesn't matter if it fails, veeing and multiple passes with flux core might work.A buzz box would be a better solution.If it is for a trailer hitch for road use ,or anything that matters don't bother.
Reply:A 140 amp 120V unit, isn't going to be able to produce enough power to run an .035 solid wire properly on 1/4" steel, or even 1/8" for that matter. Also, an ER70S-2 wire produces very sluggish weld puddle wetout;which makes it a poor choice for an under powered unit like a 140 amp 120V unit. ER70S-2 wire works best for out of position (vertical up) work with a more powerful unit, or spray transfer with a more powerful unit.Now, if this 2" X .250 wall sq tube is being used for a critical application, your 120 volt unit is undersized for the job. For a non-critical application, you need to forget about using solid wire, because 1/4" thick material is beyond the solid wire capability of your unit. With solid wire 1/8" is your realistic limit, and even then the unit is going to struggle to produce a qulaity weld. For 1/4" material you need to switch to an .030 or .035 E71T-11 self-shielded fluxcore wire, and use multiple stringer bead passes. Once again though, I'll point out if this 1/4" thick material is being used for a critical application you need a more powerful unit like a Hobart Handler 210 MVP or a Millermatic 211 and the skill level to produce the neccessary weld quality.ESAB Migmaster 250 Hobart Ironman 230Multimatic 215TWECO Fabricator 181i & 211iHH125EZ - nice little fluxcore only unitMaxstar 150 STH - very nice
Reply:Set your wire speed to feed out 12-14" of wire on a 5 second trigger press. I would adjust the volts to whatever the chart says for 12ga or 10ga.Feed of 12" in 5sec = 144IPM and will give you about 90amps which puts you in the 20% duty cycle range, 14" in 5 sec = 168IPM will be in the 105amp range.Your not going to do a lot of welding at these settings, mostly waiting.Anyway set it and post some pictures for further good natured comments.Matt
Reply:Originally Posted by Dan For 1/4" material you need to switch to an .030 or .035 E71T-11 self-shielded fluxcore wire, and use multiple stringer bead passes.
Reply:Just clean down to the bare metal between passes, the slag will mess up the next layers.If it is still a little low on amps,It might weld better preheated with a propane torch or heat gun.
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