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Creation Date

Summer 2016


A 3D printed (3,5) groovy torus knot , 3.5" in diameter


A steel ball bearing can roll around in the groove, but it takes three complete circuits of the torus for the ball to get back to its starting point in the groove. The torus was printed in blue, but because the groove was a bit too small for the .25" diameter ball bearing, a dremmil tool bas been used to enlarge the groove a bit, changing the color in the groove. Then color pens have been used to mark the groove into three sections, so it can be easily seen that the ball goes from one section to another each time it goes around the torus.


Rights belong to Alex Feingold