These use two abrasive surfaces (burrs) to crush beans into uniform particles. This uniformity prevents the "muddy" taste caused by uneven extraction.

High; a $100 manual grinder often beats a $200 electric one. Lower; you pay for the motor and convenience. Excellent for travel or camping. Stationary; requires counter space and an outlet. Noise Level Nearly silent. Often very loud, enough to wake others. Effort Requires 1–5 minutes of physical labor. Grinds at the push of a button.

The most critical decision is avoiding "blade grinders," which function like small blenders and chop beans into inconsistent chunks and fine dust.