This Saw is the World's Smallest Functional Circular Saw

 - Aug 11, 2015
References: 3dprint & gizmag
Hobbyist Lance Abernethy has created a working, 3D-printed circular saw that's noteworthy because it's only slightly bigger than your thumbnail. Abernethy used Onshape software to design the saw before printing it using an Ultimaker 2 3D printer.

Despite being incredibly tiny, the saw has all the components you expect to see in a typical, regular-sized circular saw such as a blade holder, a saw guard and the two halves that form the main housing for the contraption. The saw parts themselves have a shell thickness of 0.5 millimeters and a layer height of 21-40 microns.

Despite already impressive with this miniature circular saw, inventor Abernethy says he is now looking forward to creating a whole set of miniature power tools.