Planetary Ball Mills

Retsch - PM 100 - PM 200

powerful and quick grinding down to nano range
reproducible results due to energy and speed control
suitable for long-term trials

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Description
Specifications

Planetary Ball Mills are used wherever the highest degree of fineness is required. In addition to well-proven mixing and size reduction processes, these mills also meet all technical requirements for colloidal grinding and provide the energy input necessary for mechanical alloying.

The extremely high centrifugal forces of a planetary ball mill result in very high pulverization energy and therefore short grinding times.

The PM 100 is a convenient benchtop model with 1 grinding station and the PM 200 has 2 grinding stations.

Application Examples

alloys, bentonite, bones, carbon fibres, catalysts, cellulose, cement clinker, ceramics, charcoal, chemical products, clay minerals, coal, coke, compost, concrete, electronic scrap, fibres, glass, gypsum, hair, hydroxyapatite, iron ore, kaolin, limestone, metal oxides, minerals, ores, paints and lacquers, paper, pigments, plant materials, polymers, quartz, seeds, semi-precious stones, sewage sludge, slag, soils, tissue, tobacco, waste samples, wood, ...

Product Advantages

powerful and quick grinding down to nano range
reproducible results due to energy and speed control
suitable for long-term trials
2 different grinding modes (dry and wet)
optional pressure and temperature measuring system PM GrindControl
wide range of materials for contamination free grinding
Safety Slider for safe operation
perfect stability on lab bench thanks to FFCS technology
innovative counter weight 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 grinding time
jars with O-type sealing for safe operation, pressure tight

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

	PM 100	PM 200
Applications	nano grinding, pulverizing, mixing, homogenizing, colloidal milling, mechanical alloying
Fields of application	agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals
Feed material	soft, hard, brittle, fibrous – dry or wet
Performance data
Feed size*	< 10 mm	< 4 mm
Final fineness* For colloidal grinding*	d₉₀ < 1 µm d₉₀ < 100 nm	d₉₀ < 1 µm d₉₀ < 100 nm
Batch/sample volume* with stacked grinding jars	max. 1 x 220 ml max. 2 x 20 ml	max. 2 x 50 ml –
No. of grinding stations	1	2
Suitable grinding jars „comfort” 12 ml / 25 ml / 50 ml / 80 ml 125 ml 250 ml / 500 ml	1 or 2 1 1	2 2 –
Speed ratio	1:-2 / 1:-1	1:-2
Sun wheel speed	100 – 650 min^-1	100 – 650 min^-1
Effective sun wheel diameter	141 mm	157 mm
G-force**	33 g	37 g
Digital grinding time setting (hours:minutes:seconds)	00:00:01 – 99:59:59	00:00:01 – 99:59:59
Interval operation	with optional direction reversal	with optional direction reversal
Interval time	00:00:01 – 99:59:59	00:00:01 – 99:59:59
Pause time	00:00:01 – 99:59:59	00:00:01 – 99:59:59
Memory for Standard Operating Procedures (SOPs)	10	10
Measurement of energy input	•	•
Serial interface	•	•
Technical data
Drive power	750 W	750 W
W x H x D	630 x 468 x 415 mm	630 x 468 x 415 mm
Net weight	approx. 80 kg / approx. 86 kg	approx. 72 kg