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Milling Media and Milling Jar Technical Info

Choice of Grinding Jars & Grinding Balls

In order to prevent excessive abrasion, the hardness of the grinding jars used and of the grinding balls must be higher than that of the material used. Normally, grinding jars and grinding balls of the same material should be chosen.

 

Calculated Ball Weight of Typical Milling Media 

 

Ball diameter (mm)

5

10

15

20

30

40

Material

Density

Calculated ball weight (g)

Agate

2.65 g/cm3

0.17

1.39

4.68

11.10

37.46

88.80

Alumina ceramic

3.8 g/cm3

0.25

1.99

6.72

15.92

53.72

127.34

Zirconium oxide

6.06 g/cm3

0.39

3.17

10.71

25.39

85.67

203.07

Stainless steel

7.93 g/cm3

0.52

4.15

14.00

33.20

112.05

265.60

PTFE

2.14 g/cm3

0.14

1.12

3.78

8.96

30.24

71.68

Tungsten carbide

14.95 g/cm3

0.98

7.82

26.41

62.59

211.24

500.73