Anyone that does their own modelling comes across the problem of clamping a square part on a lathe's 3 point chuck. Yes some folks just purchase a 4 jaw chuck but even then it's difficult to center the piece in the chuck. So, this may be a semi sophisticated solution for those that have the right tools.
I have created a jig using cadcam tools and 3d printing. What I do is draw a nominal diameter circle and center it with a square of the stanchion's dimentions. Using 3d extrude/press-pull tools I create a cylinder with a square hole. Then I cap one end with a small hole for the live center end. Both nominal dimentions. Use two of these pieces and clamp in the piece you're going to lathe cut. See my drawing to get the jist of where I'm going
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I have created a jig using cadcam tools and 3d printing. What I do is draw a nominal diameter circle and center it with a square of the stanchion's dimentions. Using 3d extrude/press-pull tools I create a cylinder with a square hole. Then I cap one end with a small hole for the live center end. Both nominal dimentions. Use two of these pieces and clamp in the piece you're going to lathe cut. See my drawing to get the jist of where I'm going
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