Burr Coffee Grinder Product

Overview

A burr coffee grinder mills roasted beans to a uniform size by crushing them between two abrasive burrs, rather than chopping them unevenly the way a blade grinder does. Beans fall from the Bean Hopper into the Burr Set, get ground to the chosen fineness, and drop into the Grounds Bin. Consistent particle size is what lets water extract evenly, so a good burr grinder matters as much to the cup as the brewer.

The grinder doses by time: the user dials in a duration on the Dosing Control, presses start, and the motor runs just long enough to deliver a target weight of grounds for a single shot or a full pot.

How it works

Pressing the Start Switch tells the microcontroller on the Dosing Control board to run the Drive Motor for the dialed time, counting down on the LCD. The motor turns far too fast for grinding, so the Reduction Gearbox gearbox steps it down to a few hundred rpm — slow enough to keep the burrs and the coffee cool and avoid scorching the grounds.

The output shaft spins the Conical Inner Burr, a steel cone, inside the fixed Outer Ring Burr ring. Beans are drawn into the wide gap at the top and fractured into ever-smaller pieces as they spiral down toward the tight gap at the bottom, exiting only once they are fine enough to pass. Turning the Grind Adjustment Ring raises or lowers the outer burr to set that bottom gap, which is the grind size — fine for espresso, coarse for a press. The ground coffee tumbles into the bin, whose Anti-static Liner liner bleeds off the static charge that would otherwise make fine grounds cling to the walls and clump at the spout.