Planetary Micro Mill

PULVERISETTE 7

premium line

AT A GLANCE

  • Extra strong centrifugal acceleration with up to 95 g and up to 1100 rpm
  • Useful capacity of up to 2 x 30 ml
  • Extremely fast bowl changing due to SelfLOCK clamping
  • Highest process reliability and precise reproducibility

IDEAL FOR

GEOLOGY AND MINERALOGY

CERAMICS

CHEMISTRY

BIOLOGY

PHARMACEUTICALS

METALLURGY

MECHANICAL ALLOYING

MATERIALS RESEARCH

OVERVIEW

FRITSCH Planetary Ball Mills – high-performance all-rounder in routine laboratory work

The Planetary Micro Mill PULVERISETTE 7 premium line with 2 grinding stations is designed for a broad range of applications and ideally suited for loss-free grinding down to a final fineness of 100 nm of hard, medium-hard and brittle materials. Depending on the desired final fineness, the grinding can be performed dry, in suspension or in inert gas.
In addition to comminution, you can also use Planetary Mills for mixing and homogenising emulsions and pastes or for mechanical activation and alloying in materials research.

 

TECHNICAL DATA
Working principleimpact force
Optimal for material typehard, medium-hard, brittle
Number of grinding stations2
Grinding toolsgrinding bowls and grinding balls
Materials of the grinding toolsagate, sintered corundum, silicon nitride, zirconium oxide, hardened stainless steel, hardmetal tungsten carbide
Grinding bowl sizes20, 45, 80 ml
Grinding ball diameter0.1 – 20 mm
Max. feed size (depends on material)5 mm
Min. sample quantity1 ml
Max. sample quantity60 ml
Final fineness (depending on material)< 0.1 µm
Typical grinding time down to analytical fineness3 min
Grinding processdry/wet
Grinding in inert gasyes
Gas pressure and temperature measurementyes
Max. rotational speed grinding bowls2200 rpm
Rotational speed of main disk100-1100 rpm
Transmission ratio planetary disk / grinding bowlrelative = 1 : -2
Effective diameter of main disk140 mm
Centrifugal acceleration (g = 9.81 m/s²)95 g
InterfacesUSB
Electrical details100-120 V / 200-240 V/1~, 50-60 Hz, 1200 Watt
voltage, indicated by customer is set
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)LpAd = 80 dB
Weight44 kg
Dimensions (W x D x H)bench top instrument 40 x 58 x 36 cm

In the operating manual, under DOWNLOADS, you find the appropriate rotor speed limits for grinding ball-diameters and grinding bowls made of agate.

WORKING PRINCIPLE

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.
Due to sunken grinding bowls, the high-performance Planetary Micro Mill PULVERISETTE 7 premium line reaches unprecedented relative rotational speeds of the grinding of up to 2,200 rpm and centrifugal accelerations of 95 times the force of gravity. Thereby is the application of energy approximately 150 % above that of conventional Planetary Mills. For ultra-fine grinding results down into the nano range in shorter times.
Your advantage: the shortest grinding times down to any desired fineness, even into the nano range.

FEATURES
    • Rotational speed of main disk 100 – 1100 rpm, relative rotational speed of grinding bowls up to 2200 rpm
    • Absolutely safe operation – due to the revolutionary SelfLOCK, grinding bowls snap into place in the machine – without any additional clamping
    • Blocking of the mill in the event of impermissible operating states
    • Automatic shutoff function if an imbalance occurs
    • Prevention of impermissible grinding settings due to automatic detection of inserted grinding bowls and optimisation of rotation speed via RFID-Chip
    • Automatic parameter check before each grinding guarantees exact reproducibility
    • Added time savings and reliability due to fast bowl changes
    • Simultaneous comminution of up to 2 samples
    • Useful capacity of up to 2 x 30 ml
    • Ergonomically designed touchscreen features a particularly logical menu structure in 10 languages for easy, intuitive user navigation
    • Extensive accessories for simplifying your daily work

    VIEW EXTENSIVE ACCESSORIES

FASTER – SIMPLER – SAFER
  • Fast, simple and safe operation

    The sunken bowls with SelfLOCK Technology form a single unit with the lid – no additional tensioning, no incorrect operation! The bowls are simply placed in the mill, where they position themselves and snap securely into place. The grinding chamber of the premium line opens and closes automatically and independently rotates the bowl mountings into a convenient position for handling. Removal and opening of the bowls are also performed with just two motions. For easy cleaning even the milling chamber cover can be completely removed.

SOFTWARE MillControl - EASY GTM
  • Automatic control and monitoring – Measurement of gas pressure and temperature

    The software MillControl enables the automatic control of the Planetary Micro Mill PULVERISETTE 7 premium line and validation of the grinding process. 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 7 premium line into an analytical measuring system for monitoring pressure and temperature during the grinding process.

    VIEW DETAILS SOFTWARE MILLCONTROL

EQUIPMENT / ACCESSORIES
  • Configure your Planetary Micro Mill PULVERISETTE 7 premium line exactly to your specific application

    The Planetary Micro Mill PULVERISETTE 7 premium line operates with two grinding bowls in the sizes 20 ml, 45 ml or 80 ml, which turn with a transmission ratio of 1 : –2 relative to the main disk. 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 6 different materials. For grinding in inert gas and for mechanical activation and alloying premium line gassing lids are recommended – quickly and safely. For grinding in suspension, we offer an Emptying Device for a quick and easy separation of the grinding balls and suspension.

    VIEW EXTENSIVE ACCESSORIES

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