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11-19-2019, 08:40 PM #16The Historic Photo Master
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bead blasting is usually always done at way too high a pressure. its a low pressure process, so that the beads aren't shattered & impreg'ed into the material. people don't realize this, that bead blast aluminum. so...you also need to start with new bead material, not old glass bead material that's already been pulverized as well. man, its been years, but 40 psi comes to mind(?). look it up.
Last edited by FUJIMO; 11-19-2019 at 08:44 PM.
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11-23-2019, 10:07 AM #17
I've got a big plastic garbage can that I squirt some Dawn dish washing soap into. As I'm filling it with the garden hose ... the Mrs. pours gallon jugs of hot water in and I let it sit till I can reach in and swish the parts around. Hose them off, give them an lacquer thinner squirt , wire wheel the weld site , preheat the part to 200* and start sewing. I throw a sheetmetal tent over the part when I'm done and let it come back slowly ...
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tnelsmn liked this post
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11-25-2019, 02:19 AM #18Screaming And Flying!
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I am too old and stupid........wish I could sew.......Nice work Chazz......If you were closer I would want your welding skills......Don't like shipping big items.......so need to find a local welder.....
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11-25-2019, 08:07 PM #19
yammahas metals suck to weld full of junk it them. I wont even weld on them anymore
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12-01-2019, 11:42 PM #205000 RPM
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I'm I NH. I've welded alot of aluminum castings. I find that 4047 filler rod works about the best on dirty castings. If it's a die cast part it's even worse because there's usually a lot of zinc in them. The zinc vaporizes before the aluminum creating alot of porosity. Like the guys have said you need to preheat it and it needs to be really clean. You need to clean the area to be welded with a clean metal rotary burr. Not any sanding or abrasive wheels which implant impurities. You can pretty much tell when you put a torch too it how bad it's going to suck to weld.
Last edited by Umassot50; 12-01-2019 at 11:44 PM.
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