Electric coffee Hario Mini Mill Slim grinder
thingiverse
After some time, the ritual of grinding coffee has become a major inconvenience when friends come over. So I designed and tested a very simple extension to the classical Hario Mini Mill Slim coffee grinder (https://youtu.be/adNBEkSJ2eQ). From an economic standpoint, a 30-euro grinder plus a 35-euro extension is still significantly more affordable than ceramic grinders that can provide the same quality and reproducibility of coffee grinding. The used motor needs to be quite powerful since the torques required to break the beans are sometimes very surprising. In my case, I used a 200-RPM, 12-volt high-torque motor (http://www.ebay.com/itm/12V-DC-200RPM-High-Torque-Electric-Motor-Low-Noise-Gear-Box-Reduction-Motor-/161506793186?hash=item259a8e16e2:g:AFcAAOSw-YVXlw27) and to couple it to the Hario, I used a Flexible Shaft CNC Stepper Motor Coupler with a length of 25mm and a diameter of 19 mm. The motor shaft is 6 mm in diameter, and the other side needs to be drilled to approximately 7mm to fit your Hario. Print Settings: Printer: Prusa MK2 Rafts: No Supports: No Resolution: 0.35 / 0.2 mm Infill: 25% Grid Notes: Made with PLA. Custom Section: Parts needed:
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