GEOLOGY AND MINERALOGY
FRITSCH Planetary Ball Mills – high-performance all-rounder in routine laboratory work
The Planetary Mill PULVERISETTE 5 premium line with 2 grinding stations is the ideal mill for fast wet and dry grinding of hard, medium-hard, soft, brittle and moist samples as well as for mechanical alloying, mixing and homogenising of larger sample quantities with reliable results down into the nano range – and an absolutely secure automatic clamping of the grinding bowls.
|Working principle||impact force|
|Optimal for material type||hard, medium-hard, soft, brittle, tough, moist|
|Number of grinding stations||2|
|Grinding tools||grinding bowls and grinding balls|
|Materials of the grinding tools||agate, zirconium oxide, hardened stainless steel, hardmetal tungsten carbide|
|Grinding bowl sizes||125, 150, 250, 420, 500 ml|
|Grinding ball diameter||0.1 – 20 mm|
|Max. feed size (depends on material)||10 mm|
|Min. sample quantity||15 ml|
|Max. sample quantity||450 ml|
|Final fineness (depends on material)||< 0.1 µm|
|Typical grinding time down to analytical fineness||3 min|
|Grinding process||wet and dry|
|Grinding in inert gas||yes|
|Gas pressure and temperature measurement||yes|
|Max. rotational speed grinding bowls||1600 rpm|
|Rotational speed of main disk||100-800 rpm|
|Transmission ratio planetary disk / grinding bowl||i relative = 1 : -2|
|Effective diameter of main disk||180 mm|
|Centrifugal acceleration (g = 9.81 m/s²)||64 g|
|Electrical Details, additional voltages available upon request||200-240 V/1~, 50-60 Hz, 2800 watt|
|Emission sound pressure level at the workplace according to DIN EN ISO 3746 (depending on the material to be ground, grinding bowls/balls, selected rotational speed)||approx. LpAd = 84 dB|
|Dimensions (W x D x H)||bench top instrument 82 x 52 x 48 cm|
Comminution according to the Planetary Principle
The comminution takes place primarily through the high-energy impact of grinding balls and partially through friction between grinding balls and the grinding bowl wall. To achieve this, the grinding bowl, containing the material to be ground and grinding balls, rotates around its own axis on a main disk rotating in the opposite direction. At a certain speed, the centrifugal force causes the ground sample material and grinding balls to bounce off the inner wall of the grinding bowl, cross the bowl diagonally at an extremely high speed and impact the material to be ground on the opposite wall of the bowl. The grinding bowls reach twice the speed of the main disk during this process.
Due to the extra strong 2.2 kW drive power and centrifugal acceleration up to 64 g and up to 800 rpm (rotational speed of the bowl 1,600 rpm) are high-performance grindings down into the nano range possible.
Grinding has never been safer: With the completely brand new ServoLOCK clamping of the grinding bowls and the automatic check of the fastening of the bowls inside the mill, man and machine are optimally protected. In the event of impermissible operating states, the machine blocks the start of a grinding – and if an imbalance occurs it automatically shuts off.
The revolutionary ServoLOCK is activated with a single hand motion by pressing down the clamp. The actual clamping is motor-driven by the mill. Your advantage: each grinding with always same conditions without screwing or other manual fastening.
Automatic control and monitoring – Measurement of gas pressure and temperature
The Software MillControl enables the automatic control and monitoring of the Planetary Mill PULVERISETTE 5 premium line. The actual rotational speed and power consumption are checked and documented. By using two EASY GTM-bowls with special lid and transmitter you transform your PULVERISETTE 5 premium line into an analytical measuring system for monitoring pressure and temperature during the grinding process.
Configure your Planetary Mill PULVERISETTE 5 premium line exactly to your specific application
The grinding bowls of the Planetary Mill PULVERISETTE 5 premium line are available in the sizes 125 ml, 150 ml, 250 ml, 420 ml and 500 ml. This gives you total flexibility for optimal adjustment to your specific sample volume. If you would like to grind four samples simultaneously, simply order four grinding bowls, each with 125 ml or 150 ml volume and 2 stacking rings.
To achieve the best grinding results and for direct prevention of contamination of the samples due to undesired abrasion, all grinding bowls and balls are available in different materials. For grinding in inert gas and for mechanical activation and alloying premium line gassing lids are recommended – quickly and safely.
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