Retsch Cyclone Mill TWISTER in Mills

Retsch TWISTER Cyclone Mill

The Retsch TWISTER Cyclone Mill is a precisely engineered laboratory rotor mill designed specifically for the preparation of samples for subsequent near-infrared analysis (NIR). Thanks to its combination of impact and friction grinding, this mill is particularly suitable for users in the agricultural, food and feed technology and pharmaceutical industries who place the highest demands on the homogeneity and fineness of samples. With its flexible speed adjustment and extensive programming options, this mill offers decisive advantages over other rotor/impact mills in terms of adaptability, reproducibility and efficiency for routine tasks in the analytical laboratory. Innovative technology for maximum precision

The TWISTER cyclone mill from Retsch stands out thanks to its flexibly adjustable operating parameters and robust design, which is specially designed for demanding applications in laboratories and production. Its advanced design ensures consistent, reproducible grinding quality even during continuous operation - a critical factor for analytical laboratories that depend on accurate sample results.

Main features and technical highlights:

• Rotor/impact mill principle with impact and friction grinding, optimised for the requirements of NIR sample preparation
• Three preset speeds: 10,000 / 12,000 / 14,000 min-¹ for maximum application control
• Sieve sizes: 1 mm and 2 mm - allows targeted control of the final fineness
• Final fineness down to less than 500 µm, suitable for a wide variety of fibrous and soft sample types
• Powerful series-wound motor with 900 watts of drive power
• Rotor circumferential speed: 52 / 62 / 93 m/s for efficient and homogeneous grinding processes
• Accepts samples up to a grain size of < 10 mm; sample quantity up to max. 250 ml
• Robust, compact design: dimensions 449 x 427 x 283 mm (W x H x D), weight 14 kg
• Flexible mains connection options for different laboratory requirements (various voltages, 1-phase connection)
• Device complies with CE standards, ensuring the highest safety and quality standards

The TWISTER cyclone mill features a sophisticated cyclone separation system that not only enables efficient sample separation, but also minimises heat build-up during grinding - an important aspect for preserving sensitive sample components, for example in feed or pharmaceutical analysis.

Certifications and standards

The machine is CE certified and complies with current European safety, health and environmental requirements. This guarantees both high-quality workmanship and operation in compliance with all relevant laboratory standards.

Typical applications in laboratories and industry

The TWISTER cyclone mill is designed for fast and controlled sample preparation in routine analyses and is ideal for the following applications:

• Agricultural science: Rapid grinding of grain, maize seeds and other plant samples in preparation for moisture, protein content or starch measurement using NIR.
• Food/feed industry: Processing of materials such as flour, sugar, feed pellets, dried vegetables or spices for quality control and process optimisation.
• Pharmaceutical research & development: Homogenisation and grinding of tablets, herbal medicines or granules for pharmaceutical active ingredient analysis. Medical laboratory diagnostics: Sample preparation for ingredient analysis of medical powders, herbal extracts and dietary supplements. Other typical substances: Wheat semolina, soy flour, cereal grains, alfalfa, pharmaceutically active substances.

  FAQs on use in specialist laboratories

  How is the optimum speed set and selected?

  The speed can be conveniently selected via the digital control panel in three stages (10,000 / 12,000 / 14,000 min-¹). This adjustment allows targeted grinding of different materials without changing tools.

  Which types of samples can be ground particularly efficiently with the TWISTER?

  The mill has been optimised for fibrous, soft and organic materials such as plant substances, seeds, flour products and pharmaceutical powders.

  What should be considered when selecting the sieve size?

  For most NIR analyses, a 1 mm sieve is selected, while coarser samples are best processed with a 2 mm sieve. The quick change allows for flexible sample processing.

  Is the device suitable for continuous operation under high loads?

  Thanks to its powerful motor and robust materials, the cyclone mill is designed for long-term operation - ideal for laboratories with high sample throughput. How is overheating of temperature-sensitive samples prevented?

  The effective cyclone separation system reduces the temperature rise during grinding, so that heat-sensitive components are preserved as far as possible.

  Conclusion

  The Retsch TWISTER cyclone mill delivers maximum performance for demanding sample preparation in laboratories and production. Its application-oriented technology, high-quality workmanship and flexible configuration make it the first choice for specialised laboratories in the agricultural, food, feed and pharmaceutical industries. The reliable CE certification and everyday-use design meet the highest requirements - a decisive advantage for analytical precision and sustainable laboratory use.