Anecdote: when my dad was a child, one of the main coffee machines in the entire village required the slow work of a donkey attached to crankshaft to grind the

Anecdote: when my dad was a child, one of the main coffee machines in the entire village required the slow work of a donkey attached to crankshaft to grind the beans. One day, someone decided to mechanize this process, and attached it to a motor. The whole village gathered to watch the stunt, and my dad says the machine literally exploded from the speed. No one was injured but parts of the machine could be found far away from the centre for a long time.