Then along came electricity, and things just got easier. The first electrified coffee grinders actually operated on the same principle as the hand-cranked version. There were basically two flat plates (one stationary and the other moving) that the coffee beans were crushed between. Things have gotten better since then although the principle remains basically unchanged — only improved upon.
Today, you can buy coffee grinders with blades that simply chop the beans into fine particles. However, these particles are not of identical size. These blade-type coffee grinders can be bought for as little as $20, but they are not the best choice.
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KitchenAid Pro Line Burr Grinder KPCG100
The best choice for a coffee grinder is a “burr” grinder. The burr coffee grinders operate on the same basic principle as the old hand-cranked coffee grinders in that there are two plates. However, these plates have burrs on them, and the coffee particles of beans that have been ground in a burr grinder are all of identical size. Burr grinders are, of course, more expensive, but they are much better coffee grinders.



