This one has me stumped! I have a part with 2 bores, datums F and G, about 75 mm apart. They are coaxial, the only difference is diameter. I need to construct a cylinder that runs the length of both bores, but is the same diameter of the smaller (F). Trying to construct a cylinder directly from the cylinders gives me the illegal number of inputs, or math fails. Constructing a cylinder using the paramaters of G but the diameter of F also fails in the same way. Constructing a generic cylinder with the paramters of G and diameter of F, and then constructing the cylinder from the generic and F, the resulting cylinder is not not coaxial with the parent cylinders. Is there a way to do this? I have the datum set right now as a line, but i would really prefer a 3d feature controlling this datum structure. Thanks!

derrick

derrick

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