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Chrome Moly tube welding?

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  • Chrome Moly tube welding?

    Any help on welding frame for go-kart? A buddy has a son with a hotrod go- kart and they want to put a different engine in it and they need one of the cross bars moved. I have welded many years but never chrome moly. Any help would be good!!!

  • #2
    This ain't gonna be good.
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    • #3
      Chrome Moly welding?

      Hey i'm looking for some info on welding chrome moly tubing. My buddies' son has a go kart and they want to put a bigger engine on it so they need to move one of the cross bars. I have been welding for quite a few years but mainly on things quite a bit larger( D-8, D-9, ect.) I have a Trailblazer 302 w/ 12 RC wire feeder and a Dynasty 200 DX. Need to know the best process and what wire or filler metal to use. Thanks...

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      • #4
        I read on the Internet somewhere that you should weld it with oxy-acetylene...

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        • #5
          Lots of stuff on this subject.
          Do a search. You'll find enough stuff to make your eyes hurt.

          Long and short of it is...I'd tig it with ER80S-D2 or ER70-S2.

          Andy

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          • #6
            Thanks, andy

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            • #7
              Originally posted by ROD BURNER View Post
              Hey i'm looking for some info on welding chrome moly tubing. My buddies' son has a go kart and they want to put a bigger engine on it so they need to move one of the cross bars. I have been welding for quite a few years but mainly on things quite a bit larger( D-8, D-9, ect.) I have a Trailblazer 302 w/ 12 RC wire feeder and a Dynasty 200 DX. Need to know the best process and what wire or filler metal to use. Thanks...
              Well if you had searched this topic you would have found about 84 pages dealing with this subject. The short story is, with what you have, Tig with ER70S-2. Stresses on the joint will determine if you need to perform any post weld operation.
              -Aaron
              "Better Metalworking Through Research"

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              • #8
                Originally posted by MAC702 View Post
                I read on the Internet somewhere that you should weld it with oxy-acetylene...
                If the OP had said he had that as an option I would have suggested it
                "Better Metalworking Through Research"

                Miller Dynasty 300DX
                Miller Dynasty 200DX
                Miller Spectrum 375 extreme
                Miller Millermatic Passport

                Miller Spot Welder
                Motor-Guard stud welder

                Smith, Meco, Oxweld , Cronatron, Harris, Victor, National, Prest-o-weld, Prest-o-lite, Marquette, Century Aircraft, Craftsman, Goss, Uniweld, Purox, Linde, Eutectic, and Dillon welding torches from 1909 to Present. (58 total)

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                • #9
                  One thing to keep in mind, on a Kart the suspension is the flex in the frame. In the wet, most of the bracing comes off, on a high grip track bracing goes on.

                  If you are changing cross bars, that part needs to stay in line, engine and axle sprockets that is.

                  Keep an eye on the welds when you are running it, the frames move and twist a lot on the track, especially in high g turns.

                  So what are you changing from, to?

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                  • #10
                    Originally posted by ROD BURNER View Post
                    Any help on welding frame for go-kart? A buddy has a son with a hotrod go- kart and they want to put a different engine in it and they need one of the cross bars moved. I have welded many years but never chrome moly. Any help would be good!!!
                    Well, if the frame fails they will blame you, and if the is injury involved, they will come after you. Yes Dad is all for it, but Mom will hang you ass. Having never welded chrome moly, I dint think this is the place to learn.
                    Just my $.02
                    Be safe
                    Jeff

                    Give more than you get and
                    you will get more than ya need.
                    This is true for the good and bad
                    that life puts out.

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                    • #11
                      I didnt think welding chrome molly is all that hard to weld. Copper nickel on the other hand, well lets just say it took some practice.
                      If you want peace, be prepared for war!

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                      • #12
                        There's a few ways to weld it wrong.

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                        • #13
                          Being "easy to weld" has different meanings to the guy doing the welding, and the guy doing the engineering. Often times the "ease" of welding by the weldor, is falsely interpurted as geing easily welded from an engineering point of view. From a weldors point of view, 2024 aluminum is easily welded, and beautiful looking welds quite common. Unfortunately they arent worth a darn as is to the engineer.
                          "Better Metalworking Through Research"

                          Miller Dynasty 300DX
                          Miller Dynasty 200DX
                          Miller Spectrum 375 extreme
                          Miller Millermatic Passport

                          Miller Spot Welder
                          Motor-Guard stud welder

                          Smith, Meco, Oxweld , Cronatron, Harris, Victor, National, Prest-o-weld, Prest-o-lite, Marquette, Century Aircraft, Craftsman, Goss, Uniweld, Purox, Linde, Eutectic, and Dillon welding torches from 1909 to Present. (58 total)

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                          • #14
                            Yep,

                            I'd just get the old 302 Trailblazer out, hook up my 30 Amp spoolgun, and mig that dang old chrome molly. Nuthin to it a little practice won't fix.
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                            • #15
                              Originally posted by SundownIII View Post
                              Yep,

                              I'd just get the old 302 Trailblazer out, hook up my 30 Amp spoolgun, and mig that dang old chrome molly. Nuthin to it a little practice won't fix.
                              LMAO 30 amp spool gun, haha I remember that.
                              Voigt Precision Welding, Inc.

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