FRITSCH PULVERISETTE 9 - Manual (Page 24)

6.1 Preparing for grinding
Preselect the speed, grinding duration and possible pause
times and repeats. A grinding duration of 2 ‐ 4 minutes is
sufficient in most cases to achieve a satisfactory grinding
result. A longer grinding duration often does not result in a
grinding progress for a smaller final fineness. When dry
grinding for a longer period, the grinding stock cements to
the grinding bodies and they are then rather difficult to
clean.
6.1.1 Grinding sets
Useful capacity
of the grinding
cup
50 ml 100 ml 250 ml
Grinding bodies 1 puck 1 puck, 1 ring 1 puck, 1 ring
6.1.2 Use of the grinding set
Grinding vessels Materials
50, 100 and 250 ml Tempered steel
50, 100 and 250 ml Chromium-free steel
50, 100 and 250 ml Hardmetal tungsten carbide
50 and 100 ml Agate (operate only at 750 rpm)
50 and 100 ml Zirconium oxide
NOTICE!
Never use grinding bodies and grinding sets or different
materials, because otherwise the grinding set may become
damaged.
Always insert all pucks and rings according to the table
above.
With steel sets, always insert the ring with the outer radius
downwards. In the grinding vessel, there is also a radius at
the base.
Using the device
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