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행성 볼 밀 PM 200

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The Planetary Ball Mill PM 200 is a powerful benchtop model with 2 grinding stations for grinding jars with a nominal volume of 12 ml to 125 ml.

The extremely high centrifugal forces of Planetary Ball Mills result in very high pulverization energy and therefore short grinding times.

The PM 200 can be found in virtually all industries where the quality control process places the highest demands on purity, speed, fineness and reproducibility.

The mill is ideally suited for tasks in research like mechanochemistry (mechano-synthesis, mechanical alloying and mechanocatalysis), or ultrafine colloidal grinding on a nanometer scale, as well as for routine tasks such as mixing and homogenizing soft, hard, brittle or fibrous materials. 

행성 볼 밀 PM 200

Two grinding stations for standard applications

  • Max. speed 650 rpm
  • Up to 10 mm feed size and 0.1 µm final fineness
  • 2 grinding stations for jars from 12 ml up to 125 ml, jars of 12 and 25 ml can be stacked (two jars each)
  • GrindControl to measure temperature and pressure inside the jar.
  • Aeriation lids to control the atmosphere inside the jar
  • Storable SOPs and cycle programs, 5 different jar materials for dry and wet grinding

행성 볼 밀 PM 200 Reproducibility, safety and easy handling

  • Reproducible results due to speed control
  • Easy and safe clamping of grinding jars
  • The Safety Slider prevents starting the machine without securely clamped jars
  • Perfect stability on the lab bench thanks to FFCS technology
  • Innovative counterweight and imbalance sensor for unsupervised operation
  • Comfortable parameter setting via display and ergonomic 1-button operation
  • Automatic grinding chamber ventilation
  • 10 SOPs can be stored, programmable starting time
  • Power failure backup ensures storage of remaining processing time

Settings & Options

  • Dry and wet grinding possible
  • Suitable for long-term trials, 99 h max.
  • Interval operation allows for cooling breaks
  • Direction reversal helps to minimize caking effects
Comfortable parameter setting via display and ergonomic 1-button operation

The best alternative to a Retsch planetary ball mill? A Retsch mixer mill.

Benefit from particularly ergonomic handling while achieving the same finenesses down to the nanometer range.

Operation of the RETSCH planetary ball mills is particularly safe. They feature a robust Safety Slider which ensures that the mill can only be started after the grinding jar has been securely fixed with a clamping device. The self-acting lock ensures that the jar is seated correctly and securely. This proven solid mechanical system is less failure-prone than electronic solutions - the user has full access to the sample at any time. When the electronic system fails, it is not possible to unlock the jars, for example.

Wet grinding is used to obtain particle sizes below 5 µm, as small particles tend to get charged on their surfaces and agglomerate, which makes further grinding in dry mode difficult. By adding a liquid or dispersant the particles can be kept separated.

To produce very fine particles of 100 nm or less (nano-scale grinding) by wet grinding, friction rather than impact is required. This is achieved by using a large number of small grinding balls which have a large surface and many friction points. The ideal filling level of the jar should consist of 60 % small grinding balls.

For more details on jar filling, wet grinding and sample recovery watch the video.

The video shows wet grinding in the Planetary Ball Mill PM 100.

The graphic shows the result of grinding barium titanate at 500 rpm in the PM 200. After 5 h of pulverization in heptane and oleic acid mixture with 0.5 mm grinding balls, the D90 value of the original sample was reduced from 15 µm to 95 nm. 

Grinding of barium titanate in heptane and oleic acid mixture with 0.5 mm grinding balls. Blue curve: original sample; green curve: pulverized sample after 5 h. 

Grinding of barium titanate in heptane and oleic acid mixture with 0.5 mm grinding balls.
Blue curve: original sample; green curve: pulverized sample after 5 h. 

행성 볼 밀 PM 200 EasyFit grinding jars for excellent results

The performance and the result of sample preparation are also determined by the choice of the grinding jar and its ball charge. The EasyFit range of jars has been specially designed for extreme working conditions such as long-term trials, even at maximum speed of 800 rpm, wet grinding, high mechanical loads and maximum speeds as well as for mechanical alloying. This line of jars is suitable for all RETSCH planetary ball mills.

The new EasyFit grinding jar series features a structure on the bottom of the 50-500 ml jars called Advanced Anti-Twist (AAT). This ensures that the jars are tightly fixed without the risk of twisting, even at high speed, and that wear and tear is drastically reduced. Secure clamping of the jars is made much easier: to find the correct clamping position, a maximum twist of 60° is required.

The geometry of the EasyFit jars in the 50 ml and 250 ml sizes has been enlarged in diameter and reduced in height compared to the previous "comfort" models. This offers two advantages: better grinding results and interchangeable lids, as there are only three diameter dimensions for the entire grinding jar range.

Diameter categories

  • Diameter 1: 12 ml and 25 ml grinding jars
  • Diameter 2: 50 ml, 80 ml and 125 ml grinding jars

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  • Available jar sizes: 12 ml / 25 ml / 50 ml / 80 ml / 125 ml
  • Innovative Advanced Anti-Twist (AAT) function ensures secure fit of grinding jars
  • High flexibility thanks to suitability of three lid sizes for all seven jar sizes
  • Pressure-tight and dust-proof O-ring sealing prevents material spillage
  • Jars and balls available in 5 materials: hardened stainless steel, tungsten carbide, agate, sintered aluminium oxide, zirconium oxide
  • Stainless steel protective jacket for agate, sintered aluminum oxide, zirconium oxide and tungsten carbide grinding jars
  • A groove between jar body and lid allows for easy opening of the lid, e. g. with the help of a spatula, if there are underpressure effects inside the jar
EasyFit grinding jars for excellent results - Planetary Ball Mill PM 300

Jars & lids for special applications 

  • For colloidal or wet grinding, the use of a grinding jar with a special closure device is recommended
  • The special closure device is designed for ergonomic handling
  • Aeration lids are designed for working under inert atmosphere, for example if oxygen can influence the grinding process or the mechanosynthesis. The lids allow the introduction of gases like argon or nitrogen into the grinding jar.
  • Optional pressure and temperature measuring system PM GrindControl

Both the aeration lid and GrindControl can now be equipped with inlays of different materials. Thus, the lid can be used for, e. g. a steel and a zirconium oxide jar by simply exchanging the inlay.

Jars & lids for special applications  - Planetary Ball Mill PM 300
Grinding jar
nominal volume
Sample amount Max. feed size Recommended ball charge (pieces)
Ø 5 mm Ø 7 mm Ø 10 mm Ø 15 mm Ø 20 mm Ø 30 mm Ø 40 mm
12 ml up to -까지 5 ml <1 mm 50 15 5 - - - -
25 ml up to -까지 10 ml <1 mm 100 25 8 - - - -
50 ml 5 – 20 ml <3 mm 200 45 10 7 3 - -
80 ml 10 – 35 ml <4 mm 250 70 25 10 5 - -
125 ml 15 – 50 ml <4 mm 500 110 30 18 7 - -

The table shows the recommended charges (in pieces) of differently sized grinding balls in relation to the grinding jar volume, sample amount and maximum feed size.

Medium-hard: 바이오매스

바이오매스

35 g sample
125 ml stainless steel grinding jars
7 x 20 mm stainless steel grinding balls
15 min at 500 rpm 

Brittle: tin sulfide

tin sulfide

52 g sample
125 ml agate grinding jars
50 x 10 mm agate grinding balls
60 min at 550 rpm
10 min intervals and direction reversal 

Fibrous: 볏집

볏집

7 g sample
125 ml zirconium oxide grinding jars
50 x 10 mm zirconium oxide grinding balls
40 min at 300 rpm
10 min intervals and direction reversal

Hard: natural rocks

natural rocks

60 g sample
125 ml stainless steel grinding jars
7 x 20 mm stainless steel grinding balls
10 min at 420 rpm

샘플 준비 작업에 가장 적합한 솔루션을 찾으려면 애플리케이션 데이터베이스를 방문하십시오.

분쇄 용기는 행성 볼 밀의 sun wheel에 편심 배치됩니다. 용기의 운동 방향은 sun wheel 대하여 1:-2 비율로 반대 운동합니다.

분쇄 용기 내 분쇄용 볼은 소위 코리올리의 힘 (Coriolis forces)이라 불리는 중첩 회전 운동을 받습니다. 볼과 용기간의 상이한 속도는 높은 동적 에너지를 방출하는 마찰력과 충격 사이에서 상호 작용을 발생시킵니다. 이러한 힘 사이의 상호 작용은 행성 볼 밀의 분쇄를 매우 효과적이며 높은 수준으로 만듭니다.

기술적 변경 및 오차가 있을 수 있습니다