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Thread: Flux core wire

  1. #1
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    Flux core wire

    Hey guys now that it's starting to warm up here in Wisconsin I am going to be doing more mig welding outside. Is there a good penetrating .035 flux core wire anyone recommends. Looking for something that will burn through some minor grease or paint or scale I am burning this in a old miller 200 I do have a 75/25 cylinder

  2. #2
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    Re: Flux core wire

    Are you using this outside. If so I would use .045 innershield . .035 really doesn't deposit much material and in my opinion is good for 1/4" or so max. Nr-211 mp would be my choice. You will need to run that wire electrode negative. As for dual shield, it's good stuff but rarely needed . If your welding 3/8" or so indoors it can be benificial but it's probably the most expensive route material wise as your using gas and a fairly expensive wire. As for the weather it seems like whenever we get a warm day it's accompanied by 20 mph winds as well.

  3. #3
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    Re: Flux core wire

    I have some nr211 in 035 but I don't have a set of knurled drive rolls I don't know how critical the knurled rolls are

  4. #4
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    Re: Flux core wire

    Here's a good vid where he breaks things down, shows the pros and cons, with 035 wire in the machine, and talks about the knurled rollers.


  5. #5
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    Re: Flux core wire

    Quote Originally Posted by paid-for View Post
    I have some nr211 in 035 but I don't have a set of knurled drive rolls I don't know how critical the knurled rolls are
    I couldn't tell you as I've always used knurled for flux core. I would try it and see, worst case is a birds nest.

  6. #6
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    Re: Flux core wire

    Quote Originally Posted by paid-for View Post
    I have some nr211 in 035 but I don't have a set of knurled drive rolls I don't know how critical the knurled rolls are
    fluxcore is very thin walled tube and the center is full of flux. the knurled rollers are designed to lighly grip and feed the wire without collapsing the walls. solid rollers would likely need far to much tension, probly distorting the wire so it doesnt feed through the liner correctly but also smashing the flux
    invertig 221 water cooled
    millermatic 211
    hypertherm powermax 30xp

  7. #7
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    Re: Flux core wire

    It more how thin the steel you welding.
    I use 0.030 E71T-11 works great for all my welding. It will thin gauge and up to 1/4"
    When was in business I used 0.052 wire with CO2.

    Dave

    Quote Originally Posted by paid-for View Post
    Hey guys now that it's starting to warm up here in Wisconsin I am going to be doing more mig welding outside. Is there a good penetrating .035 flux core wire anyone recommends. Looking for something that will burn through some minor grease or paint or scale I am burning this in a old miller 200 I do have a 75/25 cylinder

  8. #8
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    Re: Flux core wire

    Use Lincoln NR-211 .035 up to 1/4 inch. After that, go to .045 NR212.
    -Ruark
    "Become one with the puddle, grasshopper" - Welding Instructor
    Lincoln 3200HD
    Hobart Stickmate LX235
    TWECO Fabricator 211i

  9. #9
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    Re: Flux core wire

    Quote Originally Posted by paid-for View Post
    I have some nr211 in 035 but I don't have a set of knurled drive rolls I don't know how critical the knurled rolls are
    For flux core, whether its self sheilded or not you need at least one of the drive rolls to be knurled to make it feed, but 2 knurled rolls is better.


    As far as size of the rolls go if they are undersized a bit it dont matter too much as long as they arent way under sized. I never realized it til this year when I finally replaced the drive rolls that came with my wire feeder 20 some years ago. The drive rolls that were in it were .045. I was running 1/16, .068, and .072 wire for years and never knew the difference....just adjust your drive rolls so they dont squash the wire.

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