Electric coffee Hario Mini Mill Slim grinder by FlashLuke

Last crawled date: 3 years ago

After some time the ritual of grinding coffee has become a troublesome thing, especially when couple of friends come over. So i designed and tested very simple extension to classical hario mini mill slim coffee grinder (see https://youtu.be/adNBEkSJ2eQ ). From economical point of view 30 euro grinder + 35 euro extension is still much more affordable than ceramic grinders that can be found to provide the same quality and reproducibility of the coffee grinding itself. Used motor has to be quite powerful since the torques needed to break the beans are sometimes very surprising. In my case I used 200 RPM 12V 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 Hario I used Flexible Shaft CNC Stepper Motor Coupler with length 25mm and diameter 19 mm. Motor shaft is 6 mm and the other side needs to be drilled to approx 7mm to fit you Hario.