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  • magnetic ground clamp

    I need to get a new ground clamp and was wondering if anyone has used the magnetic type ground clamps and do they like them. The cheap one that comes with a miller doesn't last long. Thanks

  • #2
    Real Ground Clamp

    Magnetic grounds are fine for flat iron, not so good on pipe.

    Get a real ground clamp, one that takes two hands to open and has brass pads.
    Brass pads can be cleaned. The steel pads are mostly hollow and while they can be cleaned their life span is short...Bob
    Millermatic 252 w/30A
    Big Blue Air Pak
    Ellis 3000 Band Saw
    Trailblazer 302 Air Pak w/ Wireless Remote
    8-RC
    Dynasty 200 DX
    XMT 350 MPa w/S-74 MPa Plus
    Millermatic 211
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    Lincoln SA-200 Blue Tint Red Face '63
    2-Lincoln SA-200 Red Face '68
    SA-200 Black Face '59
    SA-200 Green Lite '84
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    SA-200 Red Face '69
    SA-200 Red Face '66
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    '70 Black Face Round Barrel

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    • #3
      I agree, get a good strong clamp, or make a screw-on style...

      As for the magnetic ones, if you buy one, make sure it's a strong one, and clean the debris from the magnet frequently and clean the contact so it doesn't arc to the base metal.
      Jonny

      Dynasty 300DX
      Esab PCM 1000

      Comment


      • #4
        I'd have to disagree, personally I can't get enough of mine..

        However I did burn up the 300amp unit so moved to the 600 amp Magswitch. The company did warranty the 300 clamp, but now that I'm thinking of it, the replacement has not arrived.

        Grip is super tight, and tube is no problem.
        Two Dynasty 350's with Wireless pedals
        Victor O/A
        Profax 250 weld positioner
        Bridgeport mill
        Logan Turret lathe
        RMD tubing bender
        Enco vertical saw
        Baileigh Auto cold saw
        IR 80 Gal dual stage compressor
        Misc Fab equipment

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        • #5
          ViseGrip

          For years I used a pair of c-clamp visegrips with a 3/8 bolt welded on for the ground cable.
          It worked fine for the welding, but kinda slow to move around.
          Millermatic 252 w/30A
          Big Blue Air Pak
          Ellis 3000 Band Saw
          Trailblazer 302 Air Pak w/ Wireless Remote
          8-RC
          Dynasty 200 DX
          XMT 350 MPa w/S-74 MPa Plus
          Millermatic 211
          Passport Plus
          Spectrum 625 X-TREME
          Lincoln SA-200 Blue Tint Red Face '63
          2-Lincoln SA-200 Red Face '68
          SA-200 Black Face '59
          SA-200 Green Lite '84
          SA-200 Green Lite '80
          SA-200 Red Face '69
          SA-200 Red Face '66
          SA-200 Green Lite '81
          '70 Black Face Round Barrel

          Comment


          • #6
            i bought one,, and returned it,, the stupid thing would not stick to the aluminum helmet i was building!
            Anything you could do, I could do better.
            I can do anything better than you!
            Lockheed Martin
            Armco Steel, Baltimore
            USW local #3185

            Comment


            • #7
              Like all things, magnetic ground clamps have their place...

              I have 2 versions, the standard, round magnet with the spring loaded brass contact, that is prone to arc-ing if it is not completely flat... and a 300 amp Tweco/MagSwitch unit linked below.

              http://www.thermadyne.com/tweco/news...d-clamps-.html

              To my experience, the magswitch unit is superior in every way... As stated, it is coped slightly, and adheres WELL to pipe without arc-ing, and it has fair to decent holding strength... If you are going to YANK on the welding cable, Sure, it's gonna move, or fly off the workpiece, but normal bumping or moving of the cable while welding is a non-issue.

              To each their own... Your mileage may vary.

              Have a Good Day
              Later,
              Jason

              Professional Spark Generator by Trade.

              Comment


              • #8
                Usless

                That Tweco looks pretty good, alot of surface area.
                The one I was thinking of is the orange colored one wth the brass pad in the center.
                My freind Bud had the orange one, he took it apart, bolted a piece of flat iron to it and stuck it under his bench.
                Then he swings the flat iron out from under the bench and hangs his gun on it.
                So it wasn't useless.
                Bob

                Edit:Misspelled useless twice could only change one.
                Last edited by Bob Miller; 06-25-2010, 07:51 PM. Reason: SP
                Millermatic 252 w/30A
                Big Blue Air Pak
                Ellis 3000 Band Saw
                Trailblazer 302 Air Pak w/ Wireless Remote
                8-RC
                Dynasty 200 DX
                XMT 350 MPa w/S-74 MPa Plus
                Millermatic 211
                Passport Plus
                Spectrum 625 X-TREME
                Lincoln SA-200 Blue Tint Red Face '63
                2-Lincoln SA-200 Red Face '68
                SA-200 Black Face '59
                SA-200 Green Lite '84
                SA-200 Green Lite '80
                SA-200 Red Face '69
                SA-200 Red Face '66
                SA-200 Green Lite '81
                '70 Black Face Round Barrel

                Comment


                • #9
                  Yup, I have seen the "Orange Ones with the Brass Pad in the Center" on the internet - I think those are sold under the Hobart name...

                  The ones sold locally IIRC are a Tweco unit - MGC-300 or something like that - Most of my label is gone, and I don't use it now that I have the Magswitch unit hooked up to a 10' whip of #2/0 cable for quick change-overs.

                  Have a Good Day
                  Later,
                  Jason

                  Professional Spark Generator by Trade.

                  Comment


                  • #10
                    Whip

                    I was thinking about whips yesterday. One whip for each clamp you,ll be using.
                    I have one of those 600 amp brass c-clamp style, and never used it.
                    To heavy, to slow, and I don't have a machine that big.
                    On my cp 302 I put a gound cable to the bench and one with a regular squeeze clamp on the same neg. stud of the welder.
                    Bob
                    Millermatic 252 w/30A
                    Big Blue Air Pak
                    Ellis 3000 Band Saw
                    Trailblazer 302 Air Pak w/ Wireless Remote
                    8-RC
                    Dynasty 200 DX
                    XMT 350 MPa w/S-74 MPa Plus
                    Millermatic 211
                    Passport Plus
                    Spectrum 625 X-TREME
                    Lincoln SA-200 Blue Tint Red Face '63
                    2-Lincoln SA-200 Red Face '68
                    SA-200 Black Face '59
                    SA-200 Green Lite '84
                    SA-200 Green Lite '80
                    SA-200 Red Face '69
                    SA-200 Red Face '66
                    SA-200 Green Lite '81
                    '70 Black Face Round Barrel

                    Comment

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