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Usually, we recommend a pre grinding step (e.g. with 1mm sieve rings) if big particles use to be fed. By this, durability of small sieves like the used 80µm sieve ring will be much longer.
By grinding with Variable Speed Rotor Mill PULVERISETTE 14, usually ground particles will show a d50 smaller has half of the opening diameter of the used sieve ring. For the 80µm sieve ring, particles with d50 < 40µm might be found.
After 2 minutes, all sample use to be fed. Sieve ring and rotor use to be mainly free of residues,. Therefore, a grinding of higher amounts use to be possible.
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