I have a shaft that is nominally 0.75" diameter. I want to specify it to be manufactured between 0.747 to 0.749.
I could set the model diameter to 0.748 and then in the drawing I just add 0.001" bilateral tolerances.
But that seems a little clumsy, it would be simpler if I could keep the model diameter at the nominal 0.75, and the tolerance information 'lives' only in the drawing.
This is a fairly trivial example but in other cases where I am using metric dimensions converted to imperial and it becomes less trivial (I have to keep a separate Excel table) because I get dimensions like 10.791".
I'm thinking my only option is to learn how to use ISO shaft tolerances...