coffee beans (roasted)

Complete amount of sample got ground with 30s. A higher amount of particles use to be way finer as 2mm.

Sieve ring and rotor use to be free of residues. By using the accessories for grinding large quantities, even higher amounts should be grindable without problems.

Also a grinding with 0,5mm sieve cassette is possible. This might be the smallest sieve which should be used for grinding of this type of sample.

A further trial with 0,2mm sieve ring has shown that sample starts sticking to the sieve ring just after a few grams.