FRITSCH PULVERISETTE 4 classic line - Manual (Page 40)

2. Position the pressure plate (b) with rubber disc on the bowl as
shown in the picture.
3. When using grinding bowls with a volume of 80 ml, the adapter
(90.1120.09) (c) must be used in addition.
NOTICE!
Under no circumstances may 2 x 80 ml bowls be
clamped on top of one another. This can lead to
damage to the bowl and its component seals.
4. Then secure the pressure plate on both sides with the hexagon
socket screws shown in the picture using a hex key.
5. Place the additional clamping system with secured bowl in the
grinding bowl holder.
Accessories
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