Simple Burr coffee bean grinder

This is a coffee bean grinder.
It's essentially hand powered burr grinder with 1mm radius sized holes for coffee grounds to come out of.
It's a very simple job requires 3 prints, 2 3mm nuts and bolts and a glue gun for sealing.
Use it by putting beans in the top and turning the burr a lot, this process is tedious and needs some arm power.
** The photos are the original version of the grinder with less refinements but it's the same idea.

Here's a video of it in action ! https://www.youtube.com/watch?v=LS-nceswKVQ&feature=youtu.be