Split Sphere Spinning Top
Split Sphere Spinning Top — Image 2 of 5
Split Sphere Spinning Top — Image 3 of 5
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Split Sphere Spinning Top — Image 5 of 5
3D model · MakerWorld

Split Sphere Spinning Top

Model details

Platform
MakerWorld
Price
Free
License
CC-BY
Print, modify and use commercially — credit the author.
Formats
3MFSTL
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Author:Game Candy

Published

Download on MakerWorld

Description

Split Sphere Spinning Top

Spin the top. When it leans centripetal acceleration will pull the halves apart which then roll in a circle due to conservation of angular momentum. This model is adaptation of a design by Keiro Seto that is sold by Swiss toy manufacturer Naef.

Check out the original in the physicsfun post on instagram - https://www.instagram.com/reels/DbTZPXTC24P/

This model is optimised to be printed with Bambu PLA. I found that some PLAs could not meet the tolerances required to assemble the model.

Superglue is required to glue the spindle into the bottom half-sphere. You may need to sand the spindle with 400+ grit prior to gluing. The spindle needs to be able to slide freely in the upper half-sphere.

I used a rubber band and some matchsticks to hold the model in place during assembly.

Guides and print profiles

Print profiles and steps

0.2mm layer, 2 walls, 15% infill

Tags

fidgettoyspinningtopspinning topfunsciencephysicsbalancemotiongravitydeskdesktopspinnerangular momentumangularmomentum

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