For the comminution of soft to medium-hard, brittle and fibrous materials and for sample preparation according to RoHS (e.g. for detection of hexavalent chromium).

Soft substances such as plants, wood, roots, leaves, needles, spices, textiles, leather, chemicals, foodstuffs, grains, cellulose, chalk, kaolin, coal, soil (without stones). Medium-hard substances such as drugs, dragées, tablets, fertilisers, pellets, animal feed.

Temperature-sensitive samples can be comminuted because the fast, effective grinding reduces the thermal load on the grinding material. Difficult-to-grind samples such as styrene, polyester, synthetic resins, films, PVC, PP and PE can be made brittle, for instance through addition of liquid nitrogen, and then ground to analysis fineness. Furthermore, the Variable Speed Rotor Mill PULVERISETTE 14 is recommended for sample preparation according to RoHS.

A rotor with moulded-on ribs spins at high speed to comminute the sample through collision forces. In addition, the sharp-edged teeth together with the inserted sieve cut the sample through shearing. In the last comminution stage, the sample is subject to friction between the rotor and sieve.

• Changer system consisting of rotor, collecting vessel, sievering and labyrinth seal, completely removable and re-insertable without tools
• Regulated rotor speed (6,000-20,000 rpm)
• Optimal grinding chamber external cooling with extremely high air throughput
• Wear-free rotor made of stainless steel capable of accepting extreme loads
• Wear-free labyrinth seal between grinding chamber and drive motor
• High speed stability even under full load
• Conversion kit for iron-free grinding

As a standard you receive the Variable Speed Rotor Mill PULVERISETTE 14 in the basic configuration with collecting vessel and lid. Impact rotors and sieve rings are offered in various designs and materials and must be ordered as accessories.