lazy susan carousel bearing (parametrized)
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lazy susan carousel bearing that uses 6mm (soft air) plastic or metal BBs.
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Remixed from Shaun's original which used 6mm BB ammo. This one was designed bigger, with 10mm ball bearings and 320mm diameter.
This design is for the track. You need to provide the spherical bits that make this work – either 6mm BB ammo, or 10mm steel bearings or anything else you can find that will provide the rolling. Measure with a caliper, I have a set of “10mm” bearings which are 9.5mm and another set which are 10.0mm.
I've included the FreeCAD (I used v.20) file from @Shaun with a minor tweaks to adjust the parametrization. I've connected the things that weren't working through the <<P>> spreadsheet so that changing things there actually has the desired effect. That is the place to make changes to the parameters.
I did not get the small sections to work in FreeCAD, so I recreated these by using the cut tool in PrusaSlicer, if you tweak the parameters feel free to do the same.
Advice from Shaun on the original: I recommend adding silicone grease to the race of the bearing along with the BBs, that makes it slide nice and smooth.