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bobcat 225 and tig alum

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  • bobcat 225 and tig alum

    need to tig an aluminum oxygen cylinder base back on to cylinder what setting to use with weldcraft tig torch and argon gas.i know i have to scratch start on a piece of copper, it is 3/16 thick aluminum. machine is bobcat 225NT

  • #2
    you need a high-frequency arc starter and stabilizer
    like the miller HD-251 to weld aluminum with the bobcat
    they run around $1000.00

    Comment


    • #3
      Why copper?
      2- XMT's 350 cc/cv
      1- Blue star 185
      1- BOBCAT 250
      1- TRAILBLAZER 302
      1- MILLER DVI
      1- PASSPORT PLUS
      1- DYNASTY 200 DX
      1- MAXSTAR 150 STL
      1- HF-251 BOX
      1- S-74d
      1- S-75DXA
      2- 12-RC SUITCASES
      1- 8-VS SUITCASE
      2- 30 A SPOOLGUNS

      Comment


      • #4
        I hope you're only making something decorative. There's NO welding allowed on any high pressure cylinder. Not even during manufacturing.
        RETIRED desk jockey.

        Hobby weldor with a little training.

        Craftsman O/A---Flat, Vert, Ovhd, Horz.

        Miller Syncrowave 250.
        sigpic

        Comment


        • #5
          conversion to cold smoker

          Originally posted by Craig in Denver View Post
          I hope you're only making something decorative. There's NO welding allowed on any high pressure cylinder. Not even during manufacturing.
          it is to be part of a cold smoker no pressure

          Comment


          • #6
            why copper

            Originally posted by fabricator View Post
            Why copper?
            it supposedly dont eat the tungsten

            Comment


            • #7
              Thats a new one for me.I think you were misinformed.However you will need high frequency a/c in order to tig aluminum.
              2- XMT's 350 cc/cv
              1- Blue star 185
              1- BOBCAT 250
              1- TRAILBLAZER 302
              1- MILLER DVI
              1- PASSPORT PLUS
              1- DYNASTY 200 DX
              1- MAXSTAR 150 STL
              1- HF-251 BOX
              1- S-74d
              1- S-75DXA
              2- 12-RC SUITCASES
              1- 8-VS SUITCASE
              2- 30 A SPOOLGUNS

              Comment


              • #8
                alum welding

                You can use Heilum to weld alum But it's not as clean.Rent a bottle for a month will it be cheaper.

                Comment


                • #9
                  You can DC tig aluminum......why wouldn't it work with the Bobcat?
                  Originally posted by fabricator View Post
                  Thats a new one for me.I think you were misinformed.However you will need high frequency a/c in order to tig aluminum.

                  Comment


                  • #10
                    Originally posted by retiredIW View Post
                    it supposedly dont eat the tungsten
                    I do not doubt one bit that there is a place for the copper thing...I have heard it as well but it is not used for aluminum. Trust me I did about 10 years on a 225NT Bobcat with an old Linde Freekbox and a #26V torch with a valve and pure argon. That is the minimum you will get by with unless you can score lab grade helium for using DC EN.
                    You should just find someone with a spoolgun or hire a pro to tig it for just welding one item.
                    Bring your stuff and come on down to my shop and I'll do 'er for free
                    I like to shoot the bull with old welders

                    www.facebook.com/outbackaluminumwelding
                    Miller Dynasty 700...OH YEA BABY!!
                    MM 350P...PULSE SPRAYIN' MONSTER
                    Miller Dynasty 280 with AC independent expansion card
                    Miller Dynasty 200 DX "Blue Lightning"

                    Miller Bobcat 225 NT (what I began my present Biz with!)
                    Miller 30-A Spoolgun
                    Miller WC-115-A
                    Miller Spectrum 300
                    Miller 225 Thunderbolt (my first machine bought new 1980)
                    Miller Digital Elite Titanium 9400

                    Comment


                    • #11
                      The copper sheet was used for starting an arc in DC Tig welding. Does not contaminate the tungsten as even steel will. Generally used on machines without a lift-arc feature.

                      As has been mentioned, Hi Freq is required for AC Tig welding. Without it (except for the inverters) the arc will extinguish as it passes thru 0 when switching from DC+ to DC-.
                      Syncrowave 250 DX Tigrunner
                      Dynasty 200 DX
                      Miller XMT 304 w/714D Feeder & Optima Control
                      Miller MM 251 w/Q300 & 30A SG
                      Hobart HH187
                      Dialarc 250 AC/DC
                      Hypertherm PM 600 & 1250
                      Wilton 7"x12" bandsaw
                      PC Dry Cut Saw, Dewalt Chop Saw
                      Milwaukee 8" Metal Cut Saw, Milwaukee Portaband.
                      Thermco and Smith (2) Gas Mixers
                      More grinders than hands

                      Comment


                      • #12
                        ALum

                        I welded it with a XMT 304 at work with Helium.We didn't have a hight Feak.Which I do at my shop.I got a Syncrowave 250 DX with a watercooled rig.Miller 252,Miller 140 and 2 other machines/ 675 plasma.Fixing to get Trailblazer 302.My coworker is the one who shown me You could use helium.I tried it I really didn't like the way it welded it wasn't as clean like my new Syncrowave 250 DX LOL

                        Comment


                        • #13
                          I hope after 7 months he figgured it out.
                          2- XMT's 350 cc/cv
                          1- Blue star 185
                          1- BOBCAT 250
                          1- TRAILBLAZER 302
                          1- MILLER DVI
                          1- PASSPORT PLUS
                          1- DYNASTY 200 DX
                          1- MAXSTAR 150 STL
                          1- HF-251 BOX
                          1- S-74d
                          1- S-75DXA
                          2- 12-RC SUITCASES
                          1- 8-VS SUITCASE
                          2- 30 A SPOOLGUNS

                          Comment

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