Both materials work well, and the choice matters less than the geometry and the alignment of the burrs.
Steel
Hardened steel is the norm for espresso grinders and for most hand grinders. It is tough, it tolerates the occasional stone without shattering, and it can be cut to sharper, more complex geometries.
It dulls faster than ceramic — typically 250 to 500 kg of coffee for a domestic set, which for most households is a decade.
Ceramic
Harder than steel and considerably more wear-resistant, so it holds an edge much longer. That is why it appears in bean-to-cup machines, where the burrs are difficult to replace and expected to last the machine’s life.
The downside is brittleness. A stone that steel would shrug off can chip ceramic, and a chipped burr is a replacement.
Ceramic also runs cooler, which matters in commercial use and rarely at home.
What actually decides grind quality
Geometry — the cut pattern, and whether it is designed for espresso or filter.
Alignment — how parallel the two burrs are. A misaligned premium set performs worse than a well-aligned cheap one.
Size — larger burrs cut more per revolution and generally more evenly.
Material sits well below those three. Do not choose a grinder on it.
Last reviewed 8 August 2026