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I have designed a piece that requires short 90 degree bends in 1/2" dia. silver tubing and I refuse to cast them. After trying commercial tubing benders, the two handled kind and spring wire kind, I tried filling seamless tubing with pitch and then lead and repeated the attempts. I am currently fabricating them in two parts from synclastically and anticlastically raised elements, which is working. However, I wonder if there is an easier solution and welcome any suggestions.
There is a commercial tube-bending spring available for plumbers, which you can use, depending on your wall thickness. This is the first link I came across, so it is only to give the idea.
I have used one of these on reasonably thick brass tubing and it works well.
I'll post a pic when I have finished those parts, which should be today. I attached an image to my original post that should give you a better idea of the shape I am trying to make. I appreciate all the suggestions!
Sean - I might try the oval/spiculum thing next time. I could make the wall as thick or thin as needed.
Pal - The reason I am not casting is stubborn-ness. I am replicating an existing object in miniature and am determined to do so with metal-forming skill set alone.
2 Roses - I thought about the press since I have one but was worried about how deep I would have to go past the 1/2" depth to accommodate the loss of the flared part near the flange. Then again, I would be ready for the next time already. Plus I think I would have had to carve a positive to act as a pusher, and its always a toss-up of the best way to utilize one's time.
Marcus and Brigitte - does sand work better than pitch and lead? I have never tried it.
Justified- Yes, I tried those kinds of tubing benders, but they couldn't get the sharp turn I needed.