Flat vs Conical Burrs: What Actually Changes in the Cup

Flat burrs shear beans through a parallel cutting path and produce a comparatively narrow (more 'unimodal') distribution: more particles the same size, extracting at the same rate. The cup reads as clean, separated, articulate, the style that flatters modern light roasts.

Conical burrs crush-and-cut through a cone geometry, producing a wider, bimodal distribution, a population of fines alongside coarser particles. The fines extract fast and add body and dark-sweet depth; the spread makes dial-in more forgiving. It's the traditional espresso texture for a reason.

Drink mostly light-roast straight shots or filter? Flat geometry rewards you. Drink milk drinks and medium-dark roasts? Conical body cuts through milk beautifully and the forgiveness is worth more than clarity you'd never taste under foam. Undecided? Flats are the safer modern default, most current development energy is going into flat-burr platforms.

Nearly all quality hand grinders are conical, the geometry suits hand-cranking torque. A premium hand conical (Comandante, 1Zpresso class) will still out-grind cheap electric flats: execution quality beats geometry every time.