Coffee glossary
Burr
The cutting surface of a grinder, either a cone turning in a ring or two flat rings facing each other. Burrs cut coffee to a size; blades break it at random.
The cutting surface of a grinder, either a cone turning in a ring or two flat rings facing each other. Burrs cut coffee to a size; blades break it at random.
Alignment and sharpness matter more than the shape. A worn burr crushes instead of cutting, which produces fines and a muddier cup.