I’ve created a rod in Sketchup. It is 1" in diameter and 16" long. I need to have a couple different diameters along its length. For example, from one end extending in 6.5", I need the diameter to be only .500". For another segment within the rod over a length of about 1", I need the diameter to be .625".
One other segment within the rod (2.5" in from the other end), I need the diameter to taper from the full 1" diameter down to .550" over the course of 2". That’s probably a difference technique. Let me know if I should ask that in a separate thread.