If you’d like to grind fresh coffee beans for use with a filter, aeropress or espresso machine, you’ll need to invest in a coffee grinder. These appliances employ a grinding mechanism to turn beans into grounds. They are also sometimes referred to as coffee mills.
The mechanisms used in coffee grinders broadly fall into one of two categories; there are burr grinders, which grind coffee between a pair of revolving abrasive surfaces; and then there are blade grinders, which use a rotating blade.
Much is made of the difference between these two types of grinder. While blade types tend to be the more affordable option, burr grinders are widely held to grind more consistently, and therefore to produce uniformly ground coffee.
Ensuring the grounds in a batch of coffee are similarly sized matters because the size of the grounds will determine which brewing methods the coffee is well-suited for.