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LEGO’s turn table has considerable friction and rotating a model at an exhibition for a whole day would ruin it. A thrust ball bearing is necessary to decrease the friction. I previously 3D printed a large bearing for my Unikitty. For this year’s exhibition I needed a smaller thrust ball bearing so I designed a new medium sized ball bearing. It includes liftarms to hold a worm wheel which results in a rotation ratio of 1:78. The 3D model is available from my website. I hope it helps you for your MOCs.

 

 

 

 

 

 

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Looks very interesting, do you think the liftarms will get worn out quickly? I would think that after a full day of turning they will have considerable wear compared to Lego parts. Maybe you could redesign it to fit bearings so it will last a very long time.

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