[Uri Tuchman] had a different idea. He wanted to make a clock out of the gears used in the lathe. Can he do it? Of course, as you can see in the video below. Along the way, he used several tools.

The Hollow Clock has no face, just an open space with an hour and ... A concealed shaft and gear assembly takes care of that. For every full rotation of the minute hand (actually the white ring ...