Biometer Large Capacity Planetary Ball Mill for Various Material Milling

• Fast comminution with rotational speeds up to 900 rpm
• Loss-free grinding even below 1 μm
• Uniform fine comminution of large sample amounts
• Simple, ergonomic handling and easy cleaning
• Grinding jars and balls in 10 different materials to suit all needs and avoidance of contamination through abrasion

• Geology and Mineralogy
• Ceramics
• Chemistry
• Biology
• Pharmaceuticals
• Metallurgy
• Material Technology
• Sample Preparation For Analysis

Working Principle

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 jar, 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 jar. The grinding balls then cross the jar at high speed and further grind the sample material by impact against the opposite jar wall. In addition, impact between the balls themselves on the sample material adds to the size reduction process.

The instrument can smash and blend various products of different materials and granularity with dry or wet methods. Minimum granularity of grinded products can be as small as 0.1 micron.

Features of Planetary Ball Mills

• Elegant design, easy to operate
• Ideal for wet or dry grinding application
• Automatic and programmable control with LED display
• Multiple grinding modes to choose
• High Uniformity and excellent repeatability
• Fast rotational speed, high efficiency and fine granularity
• Digital display of the actual rotational speed of the grinding jar
• Four samples with different sizes and materials in one experiment
• Programmable interval and pause times and grinding sequences
• Stepless speed regulation, reversing function
• Smaller grinding jars also possible with an adapter
• Gear-drive offers an effective solution to problems caused by belt driving
• Grinding chamber with forced air ventilation