Retsch PM400 - Guides for material quantity and balls

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