@ above posters. Have used a Commandante hand grinder when working in a cafe. Quite satisfying to use, but not especially fast. Have a Porlex mini which is generally used for picnics, much fiddlier and doesn't sound as nice but still decent. Attached a drill to it once and almost rounded off the hex shaft top, so don't try it without a special adaptor like linked earlier...
he actually did it the absolute madman
https://www.youtube.com/watch?v=AI4ynXzkSQo
@ above posters. Have used a Commandante hand grinder when working in a cafe. Quite satisfying to use, but not especially fast. Have a Porlex mini which is generally used for picnics, much fiddlier and doesn't sound as nice but still decent. Attached a drill to it once and almost rounded off the hex shaft top, so don't try it without a special adaptor like linked earlier...