Planetary Ball Mill PM 200
The Planetary Ball Mill PM 200 pulverizes and mixes soft, medium-hard to extremely hard, brittle and fibrous materials. It is used wherever the highest degree of fineness is required. Dry and wet grinding can be carried out.
The PM 200 is a bench-top model with 2 grinding station for grinding jars with a nominal volume of 12 to 125 ml.
Application Examples
alloys, bones, ceramics, charcoal, chemical products, coal, coke, electronic scrap, fibres, glass, limestone, minerals, ores, paper, plant materials, quartz, seeds, sewage sludge, soils, waste samples, wood, ...
Product Advantages
- extreme speeds for particularly high fineness down to submicron range
- 2 grinding stations
- grinding jars with volumes from 12 ml to 125 ml, in 6 materials
- suitable for long-term trials and continuous use
- reproducible results due to energy and speed control
- direction reversal
- programmable starting time
- power failure backup ensures storage of remaining grinding time
- 1-button operation with graphic display
- 10 combinations of grinding parameters can be stored
- measurement of input energy helps to optimize grinding parameters
- automatic grinding chamber ventilation for cooling the grinding jars
- 2-year warranty, CE-conforming
Features
| Applications | pulverizing, mixing, homogenizing, colloidal milling, mechanical alloying |
| Field of application | agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment, glass / ceramics, medicine / pharmaceuticals, mineralogy / metallurgy |
| Feed material | soft, hard, brittle, fibrous - dry or wet |
| Size reduction principle | impact, friction |
| Material feed size* | < 4 mm |
| Final fineness* | < 1 µm, for colloidal grinding < 0.1 µm |
| Batch size / feed quantity* | max. 2 x 50 ml |
| No. of grinding stations | 2 |
| Speed ratio | 1 : -2 |
| Sun wheel speed | 100 - 650 min-1 |
| Effective sun wheel diameter | 157 mm |
| Type of grinding jars | "comfort" |
| Material of grinding tools | hardened steel, stainless steel, tungsten carbide, agate, sintered aluminium oxide, zirconium oxide |
| Grinding jar sizes | 12 ml / 25 ml / 50 ml / 80 ml / 125 ml |
| Setting of grinding time | digital, 00:00:01 to 99:59:59 |
| Interval operation | yes, with direction reversal |
| Interval time | 00:00:01 to 99:59:59 |
| Pause time | 00:00:01 to 99:59:59 |
| Parameter combinations that can be stored | 10 |
| Measurement of input energy possible | yes |
| Interface | RS 232 / RS 485 |
| Drive | asynchron motor with frequency converter |
| Drive power | 750 W |
| Protection code | IP 30 |
| Power consumption | ~ 1250 W (VA) |
| W x H x D closed | 630 x 468 x 415 mm |
| Net weight | ~ 72 kg |
| Workplace related emission value | LpAeq < 80 dB(A) |
| *depending on feed material and instrument configuration/settings |
Function Principle
The grinding jars are arranged eccentrically on the sun wheel of the planetary ball mill. The direction of movement of the sun wheel is opposite to that of the grinding jars in the ratio 1:-2.
The grinding balls in the grinding jars are subjected to superimposed rotational movements, the so-called Coriolis forces. The difference in speeds between the balls and grinding jars produces an interaction between frictional and impact forces, which releases high dynamic energies. The interplay between these forces produces the high and very effective degree of size reduction of the planetary ball mill.
The grinding jars are arranged eccentrically on the sun wheel of the planetary ball mill. The direction of movement of the sun wheel is opposite to that of the grinding jars in the ratio 1:-2.The grinding balls in the grinding jars are subjected to superimposed rotational movements, the so-called Coriolis forces. The difference in speeds between the balls and grinding jars produces an interaction between frictional and impact forces, which releases high dynamic energies. The interplay between these forces produces the high and very effective degree of size reduction of the planetary ball mill.
