After pre grinding with e.g. Jaw Crusher PULVERISETTE 1 Model I, higher amounts of sample can be ground to the desired fineness by using a Disk Mill PULVERISETTE 13.
With a gap setting of 0,2 mm between the grinding disks, particles up to 500 µm length can be found.
Grinding disks are free of residues; a grinding of much higher amounts is still possible.
Several other machines (like Planetary Mono Mill PULVERISETTE 6 classic line; Vibration Cup Mill PULVERISETTE 9; even Mortar Grinder PULVERISETTE 2) are capable grinding smaller quantities to an equal fineness.