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Millermatic Drive Rollers

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  • Millermatic Drive Rollers

    Will it make a difference if I use the knurled flux core rollers with solid wire on my 252? I was having some wire feed problems with a 44lb spool I replaced the tip and the liner is new. I think the problem was actually the 15ft lead used close to the machine with a partial loop in it.

    It seems like we had 251 at work that used the knurled rollers on solid wire because I remember when i would cut some wire off it had little notches pressed in it. I never really noticed a difference. I guess they had run flux core wire in the machine and switched back to solid and did not change the rollers back.

    I use the flux core wire and rollers in my small machine and it seems like you can get the lead in more snake like positions and still feed wire with no problems.

    So it seems to me that the knurled rollers do push the wire better. My question is what difference will it make on the 252 with solid wire? Will it affect weld quality? I need all the help I can get in that department.

    ps, been a member here for awhile more of a lurker reader. I like to learn tips from the pros!

  • #2
    I am the farthest thing from an expert, but my Miller 172 only came with a knurled roller and that's all I have used for solid wire. I just try to have the least amount of tension set so as to have minimal indentation of the wire.
    Miller Challenger 172
    Hobart AC/DC Stickmate
    Older Sears AC Stick machine


    • #3
      A single knurled drive roller for that wire with the tension low, will work just fine...


      • #4
        Originally posted by cruizer View Post
        A single knurled drive roller for that wire with the tension low, will work just fine...

        With prolong use would metal filings accumulate in the liner prematurely from the knurled drive shaving the solid wire? Or is it negligible (so small or unimportant as to be not worth considering; insignificant.)

        Dynasty 200 DX
        Millermatic 350P
        30A Spoolgun
        Lincoln Pro Mig 140
        Hypertherm Powermax 30
        14" Rage Evolution dry saw
        40 ton press brake
        Evenheat Heat treat oven

        1x42 / 4x48 belt grinder


        • #5
          Well with low tension and a single knurl, your not going to get any shavings. lots with the double knurl though, and yes, the shavings will make it into the liner.


          • #6

            Thanks guys! I think I figured out the problem had too many curves in the 15ft lead/liner. Too many trips under this bar and over that one. I noticed I don't seem to have that problem with my MM135 with flux wire but it has knurled rollers. It's good for the light travel stuff but the MM252 in the shop is the bees knees.

            I think I'll pick up a set of the knurled rollers and if I have problems I'll run one. I'm also going to buy me a spare liner just to have it on hand because everything tears up when the LWS is closed.