Retsch PM400, Manual

Page: 34 / 60

Operating the machine
34
5.13.1 Guides for material quantity and balls
Grinding jar
volume
Sample
volume
Max. feed size Ball filling (unit)

10mm

20mm

30mm

40mm
12 ml Up to 5 ml 1 mm 5 units - - -
25 ml Up to 10 ml 1 mm 8 units - - -
50 ml 5
– 20 ml
3 mm 10 units 3 units - -
80 ml 10
– 35 ml
4 mm 25 units 5 units - -
125 ml 15
– 50 ml
4 mm 30 units 7 units - -
250 ml 25
– 120 ml
6 mm 50 units 15 units 6 units -
500 ml 75
– 220 ml
10 mm 100 units 25 units 8 units 4 units
5.14 Ultrafine grinding
High degrees of fineness can frequently only be achieved using wet grinding.
Improved final fineness can be achieved in dry grinding by adding a few drops of
stearin or acetic acid and by using grinding balls with a Ø<10mm and a fill level of
70-80% of the grinding jar volume.
5.15 Stacking the grinding jars
5.15.1 Stacking 50ml grinding jars
Fig. 23:
You can also stack two 50ml grinding jars on top of one another.
You will need the optional adapter to stack the grinding jars.
Stacking process:
•
Place the grinding jar ( M1 ) in the grinding jar base
•
Place the adapter ( A1 ) on the lid of M1
•
Place grinding jar ( M2 ) on the adapter
•
Clamp the grinding jars as described in the chapter
“Clamping the grinding
jars”.
M2
A1
M1