An image from this paper on machining at the nano-scale. Apparently, it’s possible to simulate molecular- and atomic-level interactions, which is what the small circles in the image are.
Progressive Surface Broach
A 3d model of progressive surface broach (but don’t really know what that means), via Wikipedia user Wizard191.
Gear Animation
Step
Front step on a fire engine – just a lovely-made object that really makes me want a mill…
Self-centering vise jaws
Lovely self-centering vise jaws from Heinrich Company.