Collapsible fidget spinner

So the collapsing models contest got some ideas spinning in my head (pun intended). If you have smooth bearings it spins pretty well, it has a lip so the “caps”, the part you hold to won't interfere with the spinning parts.

Print instructions:
I have tried to make it as printable as possible, but due to limited space and a collapsing mechanism on both ends it is still a bit challenging. The part should come orientated in the right direction, but mine was a bit of center. Make sure to have drop part down off in your slicer and if you want to move things around make sure to select all meshes (ctrl+a). 

You need to have a good first layer because elephants foot can ruin this print. Maybe also print a bit cooler, because the collapsing parts are printed levitating so you can break them free. I wouldn't go bigger then a 0.4 mm nozzle, I printed with 0.4 nozzle at 0.48 wall size and 0.2 layer height. These are all suggestions, you know your printer best.

Post processing:
Push a bearing in the hole, I was able to push it in with my palm. If you are not please don't try to use a hammer, but go right to sanding. On previous iterations I have tried using a hammer but the part will split. This is due to the layer adhesion being a weak spot there, but because of the collapsing mechanisms it couldn't be orientated better. When the bearing is in push the long cap through and glue the short cap at the other side

BOM (bill of materials):
1x 608 bearing