Please note: For the Planetary Mono Mill PULVERISETTE 6 classic line, you require at least 1 grinding bowl of your choice and the corresponding number of grinding balls. The grinding bowl material must also be harder than the material to be ground. In normal cases, grinding bowls and balls of the same material are used. To shorten the grinding time, grinding bowls and balls with a higher density and correspondingly higher impact energy can be used. Please take note of the useful capacity, this is not identical with the bowl volume!
For the Planetary Mill PULVERISETTE 6 premium line / Planetary Mill PULVERISETTE 5/2 classic line / Vario-Planetary Mill PULVERISETTE 4 classic line, you require at least 2 grinding bowls of your choice and the corresponding number of grinding balls. The grinding bowl material must also be harder than the material to be ground. In normal cases, grinding bowls and balls of the same material are used. To shorten the grinding time, grinding bowls and balls with a higher density and correspondingly higher impact energy can be used. Please take note of the useful capacity, this is not identical with the bowl volume!
For the Planetary Mill PULVERISETTE 5/4 classic line, you require at least 4 grinding bowls of your choice and the corresponding number of grinding balls. The grinding bowl material must also be harder than the material to be ground. In normal cases, grinding bowls and balls of the same material are used. To shorten the grinding time, larger or heavier grinding bowls and grinding balls with a higher density and correspondingly higher impact energy can be used. Please take note of the useful capacity, this is not identical with the bowl volume!
For achieving best grinding results grinding balls are available in 0.1 - 40 mm diameters and in 7 different materials, thus directly preventing contamination of the samples as a result of undesired abrasion. The recommended number of balls per grinding bowl can be found in the selection aid.
General material specification:
Material: stainless steel - 1.3541
Abrasion resistance: fairly good
Suitable for: medium-hard, brittle samples
Planetary Mono Mill PULVERISETTE 6 classic line / Planetary Mill PULVERISETTE 5/4 classic line / Planetary Mill PULVERISETTE 5/2 classic line / Vario-Planetary Mill PULVERISETTE 4 classic line
(Selection Aid)
MATERIAL DATA FOR GRINDING BOWLS / BALLS
Material | Main component of the material | Density g/cm³ | Abrasion resistance | Used for grinding material |
Agate | SiO2 | 2.65 | good | soft to medium-hard samples |
Sintered corundum | Al2O3 (99.7%) | 3.8 | moderately good | medium-hard, fibrous samples |
Silicon nitride | Si3N4 | 3.25 | extremely good | abrasive samples, metal-free grinding |
Zirconium oxide | ZrO2 | 5.7 | very good | fibrous, abrasive samples |
Stainless steel | Fe – Cr – Ni | 7.8 | moderately good | medium-hard, brittle samples |
Tempered steel | Fe – Cr | 7.9 | good | hard, brittle samples |
Hardmetal tungsten carbide | WC | 14.95 | very good | hard, abrasive samples |
RECOMMENDED NUMBER OF BALLS PER GRINDING BOWL
Grinding balls ≥ 5mm
Recommended number of balls per bowl
Grinding bowl/ Useful capacity (grinding material) |
80 ml 10 – 30 ml |
250 ml 30 – 125 ml |
500 ml 80 – 225 ml |
Balls diameter | |||
40 mm | 4 | ||
30 mm | 6 | 8 | |
20 mm | 5 | 15 | 25 |
15 mm | 10 | 45 | 70 |
10 mm | 25 | 50 | 100 |
5 mm | 250 | 1200 | 2000 |
Grinding balls ≤ 3 mm
Recommended ball mass per grinding bowl in grams
Grinding bowl/ Useful capacity (grinding material ) |
80 ml 10 – 30 ml |
250 ml 30 – 125 ml |
500 ml 180 – 225 ml |
Material | |||
Zirconium oxide | 100 g | 400 g | 800 g |
Stainless Steel / hardened steel | 150 g | 500 g | 1100 g |
Hardmetal tungsten carbide | 300 g | 1000 g | 2100 g |
ADDITIONAL INFORMATION
Grinding balls with diameter 3 mm and smaller must be weighed out. The above table provides you with the necessary weight to be included per grinding bowl.
The quantity of grinding balls can be reduced by up to 15%; however, increased wear should be expected in this case. The specified number/mass of balls per bowl is the minimum quantity; depending on the material behaviour, it may be necessary to increase this.
In normal cases, grinding bowls and balls of the same material are used. To shorten the grinding time, grinding bowls and balls with a higher density and correspondingly higher impact energy can be used.
Planetary Mill PULVERISETTE 6 premium line
(Selection Aid)
MATERIAL DATA FOR GRINDING BOWLS / BALLS
Material | Main component of the material | Density g/cm³ | Abrasion resistance | Used for grinding material |
Agate | SiO2 | 2.65 | good | soft to medium-hard samples |
Sintered corundum | Al2O3 (99.7%) | 3.8 | moderately good | medium-hard, fibrous samples |
Silicon nitride | Si3N4 | 3.25 | extremely good | abrasive samples, metal-free grinding |
Zirconium oxide | ZrO2 | 5.7 | very good | fibrous, abrasive samples |
Stainless steel | Fe – Cr – Ni | 7.8 | moderately good | medium-hard, brittle samples |
Tempered steel | Fe – Cr | 7.9 | good | hard, brittle samples |
Hardmetal tungsten carbide | WC | 14.95 | very good | hard, abrasive samples |
RECOMMENDED NUMBER OF BALLS PER GRINDING BOWL
Grinding balls ≥ 5mm
Recommended number of balls per bowl
Grinding bowl/ Useful capacity (grinding material) |
160 ml 20 – 70 ml |
250 ml 30 – 125 ml |
500 ml 80 – 225 ml |
Balls diameter | |||
40 mm | 4 | ||
30 mm | 6 | 8 | |
20 mm | 10 | 15 | 25 |
15 mm | 30 | 45 | 70 |
10 mm | 35 | 50 | 100 |
5 mm | 350 | 1200 | 2000 |
Grinding balls ≤ 3 mm
Recommended ball mass per grinding bowl in grams
Grinding bowl/ Useful capacity (grinding material ) |
160 ml 20 – 70 ml |
250 ml 30 – 125 ml |
500 ml 80 – 225 ml |
Material | |||
Zirconium oxide | 250 g | 400 g | 800 g |
Stainless Steel / hardened steel | 350 g | 500 g | 1100 g |
Hardmetal tungsten carbide | 650 g | 1000 g | 2100 g |
ADDITIONAL INFORMATION
Grinding balls with a diameter of 3 mm and less must be weighed out. The respective table for the PULVERISETTE 6 premium line provide you with the required mass per grinding bowl.
The specified ball fi lling per bowl is the minimum quantity and should possibly be increased depending on the material properties. In exceptional cases, the number of grinding balls can be reduced by up to 15 %. However, increased abrasion should be expected.
In normal cases, grinding bowls and balls of the same material are used. To shorten the grinding time, grinding bowls and balls with a higher density and correspondingly higher impact energy can be used.