Planetary Ball Mill RM 200 - The ideal solution for precision grinding of materials

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.

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

FAST & POWERFUL

• Loss-free size reduction down to the submicron range
• Wet grinding yields particle sizes in the nanometer range (<100 nm)
• Variable speed from 100 to 650 rpm,
• speed ratio 1:-2
• Grinding with up to 33.3 x acceleration of gravity
• Batch-wise processing with max. 2 x 50 ml sample
• Wide range of materials for contamination free grinding

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

WET AND NANO-SCALE GRINDING WITH THE PM 200

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.

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. 

TYPICAL SAMPLE MATERIALS

RETSCH planetary ball mills are perfectly suitable for size reduction of, for example, 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, etc.

TECHNICAL DATA

FUNCTIONAL PRINCIPLE