mini bike coffin tank

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A couple of days I was asked by a friend to build a coffin gas tank for his mini bike. My question is does anyone know what thickness will work for this job ?Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:For a mini bike?  Most small engine gas tanks are thiiiiin stuff.  18 gauge at the most.  There's nothing saying you can't go thicker, but I can't think of any reason to go heavier than a 14 gauge.You didn't build that.'85 Miller AEAD-200LE
Reply:Originally Posted by anickodeFor a mini bike?  Most small engine gas tanks are thiiiiin stuff.  18 gauge at the most.  There's nothing saying you can't go thicker, but I can't think of any reason to go heavier than a 14 gauge.
Reply:Having a problem tigging the thin gauge metal, does anyone have some tips to make it a little easier ?  And could the mill scale on the backside of the weld joint cause an issue ?Thanks in advance  WillWill   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Outside corners I sometimes like not using any filler, or if I use any not much. Some people like Silicon Bronze for thin stuff, it melts a little cooler so you're less likely to blow holes in stuff. What thickness are you using, and what problems are you having?
Reply:Originally Posted by slotardOutside corners I sometimes like not using any filler, or if I use any not much. Some people like Silicon Bronze for thin stuff, it melts a little cooler so you're less likely to blow holes in stuff. What thickness are you using, and what problems are you having?
Reply:What do you have current set to? What size/type tungsten?
Reply:3/32 tungsten and my machine has no way to limit the max amperage.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Gotta throw some 1/16 tungsten in there... And you can't set max amps on your tig?  That's friggin stupid.You didn't build that.'85 Miller AEAD-200LE
Reply:Originally Posted by anickodeGotta throw some 1/16 tungsten in there... And you can't set max amps on your tig?  That's friggin stupid.
Reply:You sould try making some shim stops for your pedal out of some aluminum stock or something.  Calibrate the thickness to a certain amp setting on the pedal.  You still won't have the same control as if you could set max amps, because the range of motion is reduced, however it would keep you from stomping the pedal to the floor and blowing holes real easily.You didn't build that.'85 Miller AEAD-200LE
Reply:I would make it from 3/32  aluminum......  Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock
Reply:Originally Posted by B_CI would make it from 3/32  aluminum......
Reply:Hmmmmmmmmm  Stainless is no joke, you don't have any stainless experienceand that tank is doomed.......I wouldn't use stainless......to much movement (Warp) and you need to purge the inside with Argon or you will have Sugaring.....Not a good Idea......Use aluminum, much easier to form and the Warp factor will be minimal.That's what I would use...  Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock
Reply:Originally Posted by B_CHmmmmmmmmm  Stainless is no joke, you don't have any stainless experienceand that tank is doomed.......I wouldn't use stainless......to much movement (Warp) and you need to purge the inside with Argon or you will have Sugaring.....Not a good Idea......Use aluminum, much easier to form and the Warp factor will be minimal.That's what I would use...
Reply:Yeah BC I think you are right on the stainless I can hear it warping while I Attempt to weld it. I think I will stick with the easier metals for now.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:I would use 18g...use 1/16 tungsten, .030/ .035 filler if you need to, I would fuse them and have the filler ready if you need it, try to weld each seem straight through or at least half way or more...the less starts/stops the less warpage...bend (brake) as much as you can then weld...Lincoln pro mig 180Lincoln Square Wave Tig 300/wp 20/home built water cooler Victor, Purox, Harris, O/A welding/cutting setupsVintage Craftsman drill pressVintage Craftsman/Atlas 12"x 36'' lathe7''x 12'' w/c band saw Everlast 140 st
Reply:OK the reason I suggested 3/32 Aluminum for you coffin tank is its easy to weld, stays straight  AND  being a motorcycle guy and Mini bike Builder that tank will be so strong you could crash on it and not kill it like the thin sheet metal......54 years ago, my first mini bikeTwo months ago my 58 bike with me riding it  9.82--135Last edited by B_C; 10-10-2012 at 11:36 PM.  Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock
Reply:It seems like mini bikes are popular again, People building drag mini bikes and stuff. People have seen the ones that I built and have restored and asking if I can build certain things for them. So i'm cashing in on it while its hot, making things for them and minor frame repairs and such.Last edited by Steelwill; 10-11-2012 at 07:04 AM.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Anyone know where to buy the cap and weld in opening for custom made tanks ?Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Originally Posted by SteelwillAnyone know where to buy the cap and weld in opening for custom made tanks ?
Reply:Well been talking about this tank here's some picturesWill   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Well I didnt like how that one ^^^^^^^^^^^^^ up there turned out so I started over, Made it a little bigger and refined my process. I'm learning that fit up means a lot, so I worked on my cutting methods. so Here's what I have now. All tacked up.Welded up Close up of the beads.More to come.Last edited by Steelwill; 11-07-2012 at 08:06 AM.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Zap this is turning into more of a project thread. So since its kinda out of place if ya want you can move it to the project section. Thanks in advance.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:That's a tough work!  Great job.________________________www.sawblade.comWe more progress. I added the front and the bottom.Messing around with this tank has been some fun practice. Its kinda cool watching the weld puddle following the head in the weld.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Pretty sweet man.  I dig it.  I keep telling myself, that I am gonna build a mini bike, and then my wife say like hell you are.  Women just don't understand.
Reply:Originally Posted by jfivePretty sweet man.  I dig it.  I keep telling myself, that I am gonna build a mini bike, and then my wife say like hell you are.  Women just don't understand.
Reply:More progressWill   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:I noticed from me using water to leak test the tank, is there something I rinse it out with to stop the rust?Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:steelwill loking good keep us posted.
Reply:jfive its easier to ask forgiverness than permission lol
Reply:Here's some pictures of it on a frame like the one it was made for.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:Originally Posted by SteelwillI noticed from me using water to leak test the tank, is there something I rinse it out with to stop the rust?
Reply:Originally Posted by weldermikeUse POR-15 gas tank sealer. Nice job by the way, but you should never have put water in it  not the end of the world tho. I always use kerosene, this way in case theres a leak you don't have to go crazy cleaning it out without having a gas tank as a new face The POR is GREAT stuff, I recomend it all the time, it's just time consuming, and read the directions well and you'll be a customer for life!
Reply:Well if have someone else intrested in a tank, so I fab up a few more. I tried some cold rolled sheet this time.Some weld shots 16ga 1/16 2% thoriated tungston at around 70 amps. This has been some good Tig practice.Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .