The grinder has adjustable ceramic burrs for ... selector for total control over how fine you want it, plus a solid ceramic ...

The grinder uses high-quality ceramic blades to efficiently grind coffee beans into a fine powder, ensuring a rich and flavorful cup of coffee. Ceramic coffee grinders offer several benefits.

A ceramic burr is likely to last longer than a steel burr, provided that it doesn’t encounter any rogue materials, such as a small fragment of stone, that could cause it to chip. A stepped coffee ...

Sadly the creation of a steel burr and ring was beyond his 3D-printing capabilities so those parts come from a commercial grinder, but the housing, shaft coupler and hopper are all from his printer.