If you’re interested in 3D printing or CNC milling — or really ... As humans, we like to use nice even numbers when we design parts. Lengths, diameters, and radii are usually round numbers ...

To get the most out of a printer, you really need to be able to use a CAD package and make your own design ... have a successful mechanical part. [TheGoofy] has a 100% 3D printed vise that ...