aluminum soldering

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hello masters,i want to ask if its posible to solder my aluminum shaft 1/4 diameter size?ill tried stick welding but its failed.because my WELDING machine is AC.so my last option is soldering like DURAFIX method.i use MAPP GAS PROPANE.and TORCH like this.http://www.torchsales.com/torchinfo.htmltia
Reply:Sure its possible but need more information on what you are fixing/trying to do. A picture is worth a 1000 words.
Reply:Originally Posted by 180guySure its possible but need more information on what you are fixing/trying to do. A picture is worth a 1000 words.
Reply:heres the picture of my project.its a tube chassis for my RC car.i make a steel shaft 5.5mm but its to heavy.so ill decide for aluminum because its 3 times lighter than steel.here the 1/4 aluminum rod  ready for soldering.heres the CELCORE(it is right name?)
Reply:Have you considered some kind of glue?  Not only would it be easier and cheaper, but your results might be better as well.  People say good things about JB weld.Aluminum is 3 times lighter, but it is also 3 times less stiff, I doubt it's really an issue for you, but it is something to consider.Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands.  If you want to know why, click here.Buy American or bye America.
Reply:I'm no expert but...Ideally, one would likely weld this with AC TIG...On the other hand, I think aluminum brazing rod will work...The challenge here is to prevent the heat from flowing outwards and melting all your previous joints!The trick is to have concentrated high temperture heat that you can keep localized to the  small area being fused together.e.g.  I'd use a small tip oxygen/acetylene torch and wrap damp pieces of torn rags over every previously made joint.  After each joint is made, be sure to re-damped the rags and add new ones as you proceed..If you don't have oxy/acet, I'd suggest a high velocity, hi-swirl BernzOmatic torch using propylene gas (propane is a poor choice for this).Good Luck!Rick V 1 Airco Heliwelder 3A/DDR3 CTC 70/90 amp Stick/Tig Inverters in Parallel1 Lincoln MIG PAK 151 Oxy-Acet
Reply:Originally Posted by pinjasHave you considered some kind of glue?  Not only would it be easier and cheaper, but your results might be better as well.  People say good things about JB weld.Aluminum is 3 times lighter, but it is also 3 times less stiff, I doubt it's really an issue for you, but it is something to consider.
Reply:Originally Posted by aramacirwhat kind of glue?
Reply:Originally Posted by pinjasAs I mentioned, 'JB WELD' is a product that comes to mind.  It is a kind of e-poxy that is supposed to be -extremely- strong, at least as far as glues go.  I wouldn't use it on something like a trailer, but a non weight sensitive object like the frame of an RC car is something that would probably be fine for.There may be other options as far as glues go, but you'd have to do research on that beyond what I've mentioned.
Reply:Originally Posted by pinjasAs I mentioned, 'JB WELD' is a product that comes to mind.  It is a kind of e-poxy that is supposed to be -extremely- strong, at least as far as glues go.  I wouldn't use it on something like a trailer, but a non weight sensitive object like the frame of an RC car is something that would probably be fine for.There may be other options as far as glues go, but you'd have to do research on that beyond what I've mentioned.
Reply:how about this torch?http://www.plumbersurplus.com/Prod/T...9/7307/Cat/801and ROTHENBERGER MAP PRO Propylene?http://www.allplumbingsupplies.co.uk.../prod_724.htmlthis is the only torch and gas available in my place.Last edited by aramacir; 10-18-2010 at 03:47 AM.
Reply:Originally Posted by aramacirhow about this torch?http://www.plumbersurplus.com/Prod/T...9/7307/Cat/801and ROTHENBERGER MAP PRO Propylene?http://www.allplumbingsupplies.co.uk.../prod_724.htmlthis is the only torch and gas available in my place.
Reply:I am not an advocate for whoever makes JB weld, but based on what I have read and understand, JB weld is similar in strength to steel.  On top of that, I don't think an RC car can be qualified as having any sort of structural strength requirement, what I mean is that the joints aren't bearing much weight.  If the guy has all the tools and skills needed to solder or braze the joints, I wouldn't consider going for something like JB weld.  But I am not sure if that is the case.  I've seen a few brazing products though, muggy weld and I think there is another that I have tried that seemed like viable option.  The problem I had the brazing in general was warping.  I may have been using the wrong tip for the process or something like that, but the warping was no good for me.Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands.  If you want to know why, click here.Buy American or bye America.
Reply:thanks for the reply guys.ill go for MAP Pro and Torch.btw look the RC lot of abuse.so i need a heavy duty frame.