A commercial coffee grinder is built for volume and for maintenance — larger burrs that stay cool across back-to-back doses, and a chamber you can open and clean without losing your setting.
Burr size and motor, sized to grind repeatedly without heating up.
Dosing controls, so the same weight comes out for single and double shots without weighing every time.
Serviceability — burrs that come out, parts that can be replaced, a chamber that opens. A domestic grinder with a big number on it is not a commercial grinder if it cannot do this one.
Grinding generates heat, and heat pushes the grind coarser as the burrs expand. On one shot a morning this never surfaces. On twenty in an hour it does, and the dial you set at opening is wrong by mid-service.
Larger burrs cut more per rotation and shed heat better, which is most of why commercial grinders are big. Motor speed matters too: slower usually means cooler.
Usually not — but there are two cases where it makes sense.
If you pull shots back to back for guests, a domestic grinder will fall behind and drift.
And if you change coffees often, the serviceability is the real prize: a chamber that opens for a brush-out beats purging dose after dose to clear the last bean.
If you make one or two coffees a day and rarely change beans, the money is better spent elsewhere.
