6.1.3 Calculated weight of a ball
Ball diameter in mm
5
10
15
Material
Density in g/cm
3
Calculated weight of a ball in g
Agate
2.65
0.17
1.39
4.68
Silicon nitride
3.25
0.20
1.7
5.48
Sintered corundum
3.9
0.25
1.99
6.72
Zirconium oxide
5.7
0.37
2.98
10.07
Stainless steel
7.8
0.51
4.08
13.78
Hardened steel
7.9
0.52
4.14
13.96
Tungsten carbide
14.9
0.96
7.70
25.98
To determine the weight of the required balls, the "calculated weight of a
ball" is multiplied by the "number" of balls required.
Example: A 45 ml agate bowl is to be filled with 185 agate balls with a
diameter of 5 mm.
Calculation: 0.17 g * 185 pcs
»
31.45 g
31.45 g of grinding balls can be weighed and inserted in the grinding
bowl, thus avoiding the time required for counting the balls.
6.2 Filling quantities of grinding bowls
NOTICE!
Never operate the mill without grinding stock! This can
cause damage to the grinding balls and grinding bowls.
NOTICE!
If the filling quantity is lower than the specified min-
imum, this will result in increased wear due to abra-
sion! This can cause irreparable damage to the mill
components.
Grinding bowl
Min. sample volumes
Max. sample volumes
45 ml
3 ml
20 ml
12 ml
0.5 ml
5 ml
Using the device
- 31 -