Grimy Grind: Manual Coffee Grinder Bit for Electric Drill/Screwdriver

thingiverse

Grimy Grind is a drill bit that connects with a specific manual conical burr coffee grinder to convert it to auto. No need to spend hundreds of bucks on a grinder. This + drill + $20 grinder= good riddance. Booooo expensive grinders. https://www.youtube.com/watch?v=_n_tG-FGnO4 The specific grinder this bit is for: https://amzn.com/B013R3Q7B2 There are two files. The consumable end should be printed with a high infill percentage(50-60%) and a thick shell. Shell thickness is important because it will keep the actual contact points from stripping. I used 3.2mm and so far so good. The consumable end will eventually strip no matter what, hence consumable and easily replaceable. The main bit should be printed on its side, otherwise the sheering forces will be moving with the layer's plane which will basically tear the bit in half mid grind. Uses M3(3mm) hardware. Nuts are M3 .5. Im using 12 mm length because thats what I had lying around. The nuts are countersunk with a soldering iron. You can check out my process here(very basic): https://www.youtube.com/watch?v=6nPVWPWAP7g