Burrs (coffee grinder)

Burrs are the cutting elements inside a coffee grinder that fracture beans into particles. Two types: flat burrs (two horizontal discs, high uniformity, bright flavor) and conical burrs (angled cone inside ring, lower speed, less heat, sweeter cup). Burr diameter matters: larger burrs (64 mm+ flat, 40 mm+ conical) produce more even particle distribution. Material: stainless steel (standard), titanium-coated (extended life), ceramic (home use, lower durability). Replacing worn burrs is critical for extraction consistency.