Planetary Micro Mill PULVERISETTE 7 Premium line. FRITSCH, Germany

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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.

• 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

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.

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.

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.