Verified
P-7
Fast ultra-fine shredding down to < 1 µm in just 3 minutes
The FRITSCH Planetary Mill P-7 enables the time-saving ultrafine comminution of small sample quantities up to colloid grinding. With speeds from 100 to 800 rpm, the benchtop instrument achieves a final fineness of less than 1 µm and reduces the average grinding time to analytical fineness to just three minutes. The compact system is suitable for a wide range of applications from geology to pharmaceuticals and materials technology.
Flexible grinding system for a wide range of materials
The P-7 has two grinding stations and processes sample volumes from 0.5 to 40 ml with a maximum feed size of 5 mm. The device grinds hard, medium-hard and soft as well as brittle, tough or moist materials both dry and wet. Grinding bowls in two sizes (45 ml and 12 ml) and grinding balls in various dimensions (1 to 15 mm) are available for contamination-free results. The grinding tools are available in six materials: agate, hardened stainless steel, hard metal tungsten carbide, sintered corundum, zirconium oxide and silicon nitride.
The choice of materials enables specific adaptation to different requirements. While agate is suitable for soft to medium-hard samples, silicon nitride proves its worth with abrasive materials and ensures metal-free grinding. Tungsten carbide with a density of 14.3 g/cm³ is suitable for hard, abrasive samples. Zirconium oxide with its excellent abrasion resistance is recommended for fibrous materials.
Versatile applications in sample preparation
The working principle of the planetary mill utilizes centrifugal forces of up to 50 g with a transmission ratio of 1:-2 and a relative bucket speed of 1,600 rpm. The effective diameter of the main disk is 140 mm. This design enables uniform and reproducible comminution for sample preparation for analysis. Special applications such as grinding under inert gas can be realized with an additional clamping system, as can use in a glovebox.
Practical examples demonstrate the performance: sand reaches the desired fineness after three minutes in a 45 ml steel beaker with 18 grinding balls (10 mm) at 800 rpm. Coal requires only one minute in an agate beaker with seven 15 mm balls, while lapis lazuli in zirconium oxide is ready for analysis after two minutes. For wet grinding of chalk, five minutes with 180 5 mm beads in an agate beaker is sufficient.
Compact design for laboratory operation
With dimensions of 37 × 53 × 50 cm and a weight of 35 kg, the P-7 can be easily integrated into existing laboratory environments. The power consumption is 740 W, the power supply is 100-120 V or 200-240 V at 50-60 Hz. The interface enables integration into digital laboratory processes. For single-use applications, disposable polypropylene beakers with corresponding beaker sleeves are available to prevent cross-contamination.
The P-7 offers an efficient solution for laboratories that require reproducible grinding results with small sample quantities. The combination of high speed, various grinding tool materials and compact design makes the system a practical alternative for daily sample preparation in analysis and research.
Note: This article has been automatically translated. LUMITOS offers this service to make product information available in more languages. As this article was created automatically, errors and deviations from the original are possible. The original presentation in German can be found here.
