Wrap a washer around a hole in a cylindrical part
I have a cylindrical part with a hole in it (“through all”, lets say the diameter is 20 cm). Around this hole a want to “wrap” a washer with the same inner diameter of 20 cm and an outer diameter of, let’s say, 24 cm. I can’t do it because they have an elliptical shape. They have to fit precisely. I tried with flex with no much luck because it gives my washer a “twist” which causes the washer not to fit precisely. Any ideas?