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Country Discussion Topics
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How do I welld a cast iron sink leg bracket.
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nathaniel    Posted 04-30-2002 at 20:47:02       [Reply]  [Send Email]
I need to weld/repair the leg bracket for antique cast iron sink for my victorian house. The problem lies in that I am afraid that the heat may chip the enamel of the sink as I am welding the underside. Any recommendations advice and know how welcomed


Dave CO    Posted 05-01-2002 at 03:42:12       [Reply]  [Send Email]
The 2 most common ways to mend cast is brazing with oxy/acetanlene torch, or arc weld with nickle rod. I have had to weld quite a number of early Jaguar exhaust manifolds that were porcilin(sp?) coated cast. The brazing would damage the coating because of the need to get the local area so hot, but the quick on and off of the arc weld did very little damage to the coating. As stated before, the trick is to preheat and let it cool very slowly to avoid cracking. With the Jag manifolds, as soon as the welding was done, a helper put a torch directly on the new weld, and slowly decressed the temperature.


DeadCarp    Posted 04-30-2002 at 21:42:53       [Reply]  [No Email]
Only time i saw cast iron welded successfully was years ago. A big cast iron flywheel off a sawmill had cracked, they had drilled it to stop the crack but it broke anyway. So an old welder came along & had them dig a big pit in the sand. They built a big roaring pitch-stump fire in the pit and stoked it most of the day. Meanhile they ground a groove along both sides of the break. Last thing, they rolled the flywheel over there and dropped it in the pit and covered everything with dry sand. Overnite that thing absorbed heat and in the morning, the welder started brushing off little 6-inch strips along the crack and running his bead, and covering it up again. After it had cooled down and cured a couple days, they dug it up and repeated the procedure for the other side. Once the flywheel was balanced again, it worked fine for decades. :)

If a strap along the back side of the leg wouldn't look right, i'd find a local foundry. If they want the job at all, they can cast one up at lunch-break for like $50. Course, then it would need enamel.



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