Parametric Bearing

A very bear bones bearing, that you can adjust the parameters however you want. This is very much inspired by https://www.thingiverse.com/thing:56298 , but I needed one of customizable size. The included stl will produce a bearing that:
- has a with of 8mm
- a center hole with diameter 8mm
- outer diameter of 35mm
- takes 12 6mm airsoft BBs

Simply adjust the BB's diameter, the number of them, and the inner and outer diameter. Ive also included a parameter to add some padding between the BBs themselves so it doesn't get locked up. Horizontal layer height doesn't really matter, because the grain is in the direction the bbs roll anyways.

Fusion 360 link: http://a360.co/2k1x8r8

In my example, I'm using (good quality) airsoft BBs. The outer perimeter has been modified to have a deep groove for an upcoming spool holder I have planned, that will be later though.

Note: you cannot make an 608 bearing using airsoft BB's, the walls would have to be 0.3mm thick, which just