Hello,

I'm new to the forums and still a beginner with 3D modeling/printing. What I would like to know is if I am fitting an object inside another for a 3D model, should i make it slightly smaller or the same size. For example, if I have a hollow cylinder with an inside radius of 4mm and want to have a solid cylinder inside of it that can slide freely, should I make the solid cylinder have a radius of 4mm as well, or will this not allow for free movement. Is there a recommended size shrinkage? Again I'm new to the forum so if there is a previous thread you can point me to I would appreciate it.

Thanks