Christoph Laimer developed this useful 3d printed vise and published an in-depth video on design process and various variables that go into design process, like strength, materials, etc.
Here is the video:
Thingiverse page:
http://www.thingiverse.com/thing:2064269
Here are the main components after printing:
Here is the video:
Thingiverse page:
http://www.thingiverse.com/thing:2064269
Here are the main components after printing: