Spherical Bevel Gear Ball - 14 Interlocking Gears Kinetic Desk Sculpture with Crank and Stand

A kinetic desk sculpture you print yourself: a 99 mm sphere made of 14 interlocking straight bevel gears that all turn together. Turn the knob on the top gear and the whole ball comes alive - six 24-tooth gears and eight 18-tooth gears roll against each other around a central hub, the small gears spinning a third faster and in the opposite sense. The outer faces of the gears follow the sphere and carry engraved compass-rose patterns, the windows between them show the teeth meshing inside, and t…

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