Grinding is loud by nature: beans fracturing under load, a motor under strain, and a housing that resonates.
Most of the perceived noise is the housing rather than the burrs. That is why some grinders are dramatically quieter than others at the same power.
Normal versus not
Normal: a consistent whirr or grind that changes pitch as the hopper empties, ending in a brief higher note as the last beans clear.
Not normal: a sudden metallic screech, a rattle, or a grinding sound that continues after the beans are gone.
The one to act on immediately
A sharp metallic sound usually means a stone or a foreign object in the burrs. Coffee is an agricultural product and stones get through sorting occasionally.
Stop, unplug, and clear it. Continuing will chip the burrs, and chipped burrs are a new burr set.
Quieter grinders
Some manufacturers genuinely address this — Eureka’s Silent Technology among them — with damping, motor speed control and housing design. It is not marketing, and it matters more than it sounds if you grind before anyone else in the house is awake.
Reducing it
A silicone mat under the grinder damps vibration transmitted into the worktop, which is often more of the noise than the grinder itself.
Last reviewed 8 August 2026