A burr mill coffee grinder is a coffee grinder that is used to grind hard coffee beans between two revolving abrasive surfaces separated by a distance usually set by the user.
There's also other burr mill grinders that are also used to grind other hard foods as well.
Burr Mill grinders are usually manufactured for a single purpose such as for grinding coffee beans, dried peppercorns, coarse salt, spices, or poppy seeds.
Burr Mill Coffee Grinders are very different than blade coffee grinders.
Two burr pieces in the burr mill coffee grinder funnel the coffee beans, a few at a time, through the grinding area where the coffee beans are then ground to a fairly uniform size.
These uniformly sized coffee grounds extract at the same rate and produce a balanced brew - exactly what you’re after if you’re considering a coffee grinder.
The burrs themselves are typically made of ceramic or stainless steel and perform a lot longer than cheap metal blades.
The very little heat created in the grinding process, leaving the flavors intact.
You can also make small grind size adjustments to hone in your brew, something that’s utterly hopeless with a blade grinder.