vocabularies

How a coffee grinder reduces beans to grounds: a blade grinder (a single fast-spinning blade chops the beans, the grind uneven and governed by run time), a flat-burr grinder (two parallel ringed burrs shear the beans to a uniform grade), or a conical-burr grinder (a cone burr rotates inside a ringed burr, lower-rpm and lower-heat). A token category recurring across coffee grinders (L11); the primary axis a buyer chooses on; growing (L13).

Answers the question: grinding mechanism.