$50 DIY shredder to Crush recycling from 3D printer parts ABS or PLA

Playlist of videos related to this project
https://www.youtube.com/watch?v=_RNQFxlVQao&list=PLbyUpESoABcs5I-Res3kKkKMYLoq8O7La

STL files that can be used for 3D printing can be downloaded from here
https://cults3d.com/en/3d-model/tool/mini-shredder
https://cults3d.com/en/3d-model/tool/diy-mini-shredder-plastic-crusher
https://www.thingiverse.com/thing:3126931
Bill of materials

18 pcs stainless steel blades cost $50

Other parts are made by myself or Recycling on old machines

Frame uses CNC engraving machine to cut 10MM PVC sheet;
16MM hexagonal steel shaft;
6003 inner six corner bearing;
30:1 worm gearbox;
200W hand drill;
Wooden base;
+