In theory any kitchen device designed to break solid foods into smaller pieces can be used for coffee grinding. In practice, grind size precision is very important for specialty coffee. For instance, spice grinders can sometimes be used for crushing coffee beans, however, the result is a mix of “dust and boulders“, which is to be avoided in specialty coffee.
Burr coffee grinders offer the consistent grind needed for brewing espresso, or any specialty coffee method. Blade grinders are the most convenient machines but they don’t offer the precision needed for modern coffee brewing.