This is a drill bit for the Hario manual burr grinder (Hario Mini). I have yet to try it, but I am printing now and will update as needed. Hopefully this expedites the grinding process.
UPDATE: Original bit slipped too much to be useful, reduced some dimensions and will try again tomorrow morning.
Made in Solidworks,
Using 20% infill with .3mm layer height with ABS.
Square infill for strength.