A mechanical coffee grinder is a must have item for any coffee enthusiast. Coffee deteriorates faster after it has been ground from raw beans, this is because more of the coffee is exposed to oxygen in the air. So for the best tasting coffee it is necessary to use a coffee bean grinder to grind the coffee just before brewing, this will achieve maximum freshness and taste.
Generally speaking beans ground in a coffee grinder that are very fine will produce a stronger coffee, if the beans are ground too fine a harsh bitter tasting coffee will result. Conversely using coffee grinders to produce a larger grain will produce weaker coffee. A coffee grinder will sometimes be referred to as a coffee mill although this distinction is often reserved for electronic coffee grinders.