Mazzer Robur

The Mazzer Robur is one of the most recognized conical burr sets in commercial coffee. Since the 1990s, grinders that use it (Robur, Kold, Super Kold) have become the standard in Italian and Spanish cafés, and across much of Europe.

Conical vs flat geometry

The core difference between a conical and a flat burr is how coffee flows through. In a flat burr, particles get cut once and break off. In a conical, they spiral between two cones and get cut multiple times. The result is a wider particle distribution: large particles that contribute body, and small fines that broaden extraction.

What this means in practice: the conical produces a rich, full cup with fewer acoustic details. A specialty flat burr gives clarity and nuance; a conical gives weight and depth.

The cup in espresso

The Mazzer Robur's reputation was built around Italian espresso. The conical pulls full body, thick crema, and deep chocolate sweetness out of the bean. In medium and darker roasts, this is the recognizable profile of a good shot at an Italian café. With very light roasts, the Robur doesn't surface fruity nuance the way specialty flats do, but some users prefer the weight and grounding it provides.

The cup in filter

Filter is where the conical gets challenged. The wide distribution isn't an obvious fit for pour-over, so the Mazzer Robur is rare in specialty filter setups. For those who do filter on it, the cup carries notable body but less clarity than a flat set.

The technology

Two cones — outer and inner — rotate against each other. The outer is fixed; the inner rotates. Coffee enters from the top, exits down through the center. The steel is uncoated (unhardened in the steel sense), so durability is good but not exceptional: around 800kg before edges wear. A titanium variant adds significantly to lifespan (~1700kg according to Mazzer).

Who tends to consider this set

Owners of Mazzer Robur, Kold, or comparable grinders who need a replacement set. Also users looking to add body and depth that specialty flat burrs don't provide. People focused on light-roast filter work will find better fits in SSP MP or HU.