FRITSCH PULVERISETTE 6 classic line - Manual (Page 30)

6.1.2 Number of balls per grinding bowl (independent of the material quantity)
A higher number of balls will reduce the grinding time and the grinding
result will have a smaller particle size distribution.
Ball diameter (mm) Grinding bowl
volume (ml)
80 250 500
5 Number of balls (pcs) 250 - 300 1200 - 1300 2000 - 2500
10 Number of balls (pcs) 25 -30 50 - 150 100 - 250
15 Number of balls (pcs) 10 45 - 50 70 - 100
20 Number of balls (pcs) 5 15 - 20 25 - 35
30 Number of balls (pcs) - 5 - 6 10
40 Number of balls (pcs) - - 4
These are reference figures: The number of balls may need to be deter-
mined through experimentation.
CAUTION!
When grinding with a ball size of Ø 30 mm or Ø 40 mm, do
not let the device run unsupervised. The vibrations may
lead to shifting.
Using the device
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