What is the difference between a burr grinder and a blade grinder?

The primary difference between a burr grinder and a blade grinder lies in the mechanism they use to grind coffee and the resulting grind quality. A burr grinder employs two revolving abrasive surfaces, known as burrs, which crush the coffee beans to a consistent size. This method allows for greater control over the grind size, producing uniform particles that can enhance the flavor and overall quality of the brewed coffee. Burr grinders typically offer multiple settings to achieve various grind sizes, making them suitable for different brewing methods, such as espresso, French press, or pour-over. In contrast, a blade grinder uses a spinning blade to chop the coffee beans. While blade grinders are generally more affordable and easier to find, they often produce an inconsistent grind. The irregular particle size can lead to uneven extraction during brewing, resulting in a less balanced flavor in the final cup. Furthermore, the heat generated by the blades can affect the beans' aroma and taste if the grinding process goes on for too long. For coffee enthusiasts seeking optimal flavor, a burr grinder is usually considered the superior choice.