Modified Hario Mini Mill Slim grinder
thingiverse
Modified version of grinder. Used motor with 87 rpm. It is slower, but has got higher torque. Motor shaft diameter is 6mm. https://www.ebay.com/itm/DC-12V-2RPM-1000RPM-Powerful-High-Torque-Electric-Gear-Box-Motor-Speed-Reduction/192307135083?hash=item2cc666026b:m:mcJ92yauP8TKn8ZjBmZK5tA or here https://www.ebay.com/itm/DC-12V-24V-15-1000RPM-6mm-Shaft-Dia-Cylindrical-DC-Gear-Motor-DIY-Robot-Dia-37mm/173244051458?hash=item2856267002:m:mDPSkjGH8uLgcjmD147GViA Cycle time is nerly same like hand milling. Used button: https://www.tme.eu/cz/en/details/r13508bl05brl1/standard-switches/sci/r13-508bl-05-br-l-1/# Placed 4 textile pads which reduces vibrations : https://www.ikea.com/cz/cs/catalog/products/24155600/ Printing should be paused about 52 mm and placed 4 nuts. Can be printed with supports only on pad Used nut 4x M3 bolt 4x M3x6 bolt 4x M3x10 Hario shaft has to be modified to D-shaft. Diameter 6mm. Picture added. Flexible jaw shaft coupling 6x6 https://www.ebay.com/itm/5Pcs-CNC-Motor-Jaw-Shaft-5mm-To-8mm-Coupler-Flexible-Coupling-OD-19x25mm-D19L25/153245076517?hash=item23ae1e4c25:m:mCR0dwU16WblMR7P23EPFvQ If you don`t want modify the axis you can try to make your own shaft coupling: D-shape 6mm to hex 7mm
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