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Instrument Database:
Retsch GmbH - Planetary Ball Mill PM 400
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| Year of introduction |
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| Status |
available |
| Company |
Retsch GmbH
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| Categories |
Sample preparation: Mills, Grinders
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Retsch high-speed planetary ball mill PM 400 grind and mix soft, medium-hard and even extremely hard, brittle and fibrous materials. Both wet and dry grinding is possible. The Planetary ball mill has been used successfully in almost every field of industry and research, particularly where the requirements for purity, speed, reproducibility and fineness are extreme.
Advantages
- Extreme fineness right down into the submicron range
- Fast, no-loss pulverization and mixing, either wet or dry
- Grinding two, four or eight samples simultaneously
- Reproducible results with digital adjustments and constant speed
- Simple, convenient and safe operation
- 2-year warranty, CE marked
The grinding jars for the planetary ball mill are arranged in such a way that each moves around its own axis and, in the opposite direction, around the common axis of the sun wheel - all this at uniform speed and uniform rotation ratios. The result is a constantly changing superimposition of the centrifugal forces (Coriolis motion). The grinding balls describe a semi-circular movement, separate from the inside wall and collide with the opposite surface at high impact energy. The impact and friction forces are the reasons for the impressive size reduction power of the PM 400. The sun wheel is driven by a rugged, high-power 1.5 KW motor. A frequency converter is provided to adjust speed infinitely within a range from 30 to 400 rpm; speed is kept constant via an electronic controller.
In the special version for mechanical alloying, impact energy is boosted by modifying the rotation ratio between the jars and the sun wheel, raising it from 1 : -2 to a ratio of 1 : -2.5 or 1 : -3.
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| Specifications |
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Performance Features
Working principle: Impact and friction
Max. feed particle size: 10 mm
Fineness: < 0,001 mm (depending on the material)
Sample volume: max. 4 x 250 ml or 8 x 20 ml
Mass and Weight
Over all dimensions WxDxH: 820 mm x 685 mm x 1070 mm
Weight: 285 kg
Characteristic Noise Values (DIN 45635-31-01-KL3)
Workplace related emission level: 66 dB (A)
Parameters: 4 x 250 ml zirconia with each 50 balls, ø 10 mm
Speed: 400 rpm
Quartz sand, each 90 g
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