Planetary Mill PULVERISETTE 5 classic line with 4 grinding bowl fasteners. FRITSCH, Germany

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Comminution according to the Planetary Principle

The comminution of the material to be ground takes place primarily through the high-energy impact of grinding balls. To achieve this, the grinding bowl, containing the material to be ground and grinding balls, rotates around its own axis on a main disk whilst rotating rapidly in the opposite direction. At a certain speed, the centrifugal force causes the ground sample material and grinding balls to separate from the inner wall of the grinding bowl. The grinding balls then cross the bowl at high speed and further grind the sample material by impact against the opposite bowl wall. In addition, impact between the balls themselves on the sample material adds to the size reduction process.

Due to the rotational speed of the main disk – up to 400 rpm – achieves the PULVERISETTE 5 classic line a centrifugal acceleration of up to 22 g.

• Fast comminution of laboratory samples with up to 400 rpm
• 4 working stations
• Simultaneous processing of up to 8 samples
• Useful capacity up to 4 x 225 ml
• Toothed belt drive for bowls provides constant transmission ratio
• Rotational speed regulated by microprocessor
• Digital display of the actual rotational speed of the supporting disk
• Programmable grinding and pause times and grinding sequences – for short-time operation adjustable down to the second
• Smaller grinding bowls also possible with an adapter
• RS232 interface for transmission of process parameters (validation)
• Reversing function
• Overload protection with automatic rotational speed adjustment and display
• Maintenance-free drive due to electronically regulated rotary current motor (1.5 kW) with frequency converter and permanently lubricated bearings
• Grinding chamber hood safety lock with stoppage monitoring
• Membrane keyboard
• Grinding chamber with forced air ventilation
• Gas pressured springs for easy opening of the cover
• Energy-save-function (electricity-saving mode)
• Extensive accessories for simplifying your daily work

Reproducible grinding results and absolutely safe grinding bowl clamping

The constant transmission ratio, the regulated rotational speed and precision quartz timing, ensure exactly reproducible grinding results. The Safe-Lock System, which is delivered with a torque wrench, enables simple and safe clamping of the grinding bowls – absolutely risk-free.

GTM – Gas Pressure and Temperature Measuring System

The Planetary Mill PULVERISETTE 5 classic line can be combined with the GTM-System for measuring of the gas pressure and temperature during grinding. This turns your mill into an analytical measuring system.

Configure your Planetary Mill PULVERISETTE 5 classic line matching your specific application 

The Planetary Mill PULVERISETTE 5 classic line with 4 working stations, operates with 4 respectively 8 grinding bowls of sizes 80, 250 or 500 ml, which turn with a transmission ratio of 1 : -2,19 relative to the main disk.

To achieve best grinding results, grinding bowls and grinding balls are available in various sizes and 6 different materials. Contamination of the samples due to undesired abrasion can be directly prevented. For grinding in inert gas, for mechanical activation and alloying are gassing lids recommended.