High-torque cutting mill for tough and fibrous materials
Tackle the toughest materials and ensure consistent particle size control with this cutting-edge mill, designed to effortlessly process diverse materials from soft plastics to fibrous residues, ensuring seamless integration into your production line for optimal efficiency.

The Cutting Mill SM 300 from Retsch GmbH is an advanced solution for challenging material processing tasks across multiple industries, such as pharmaceuticals, agriculture, and recycling. Equipped with a robust 3 kW motor featuring high torque and RES technology, this mill excels in reducing a wide range of materials—including soft, medium-hard, and tough compositions—into precise particle sizes. The SM 300 operates on a variable speed range of 100 to 3,000 min-1, accommodating diverse application requirements. Its double acting cutting bars and interchangeable rotor types enhance cutting efficiency, while the optional cyclone separator aids in processing heat-sensitive materials. Available in stainless steel versions including 316L for food and pharmaceutical applications, the mill supports high material recovery and easy maintenance. Safety features such as an electronic check prevent operation with an open door, and the design facilitates ease of cleaning between batches, making the SM 300 an integral part of seamless and efficient production lines.
Benefits
- Enhances processing efficiency by handling tough and elastic materials with high torque and RES technology.
- Allows precise control of particle size with a variable speed range, optimizing product uniformity.
- Supports easy cleaning and quick maintenance with a user-friendly design, minimizing downtime.
- Adapts to various production needs with interchangeable rotor types, offering flexibility in applications.
- Ensures high material recovery rates and consistent quality output, crucial for sensitive product formulations.
- Applications
- Chemistry,Secondary fuels,Food,Polymers,Biofuel,Electronics,Animal feed,Biology,Plant materials,Plastics,Wood,Recycling,Pharmaceuticals,Metal powders,Medicine,Waste,Environment,Agriculture,Textiles
- End products
- Recycled cardboard pulp,Synthetic rubber granules,Industrial adhesives,Medicinal plant powders,Biodegradable polymers,Pharmaceutical powder,Eco-friendly packaging material,Mdf wood chips,Plastic pellets,Pet bottle flakes,Lignocellulosic feedstock,Animal diet formulations,Herbal concentrates,Food flavorings,Pigment dispersions,Food additive powders,Resin particles,Cellulose insulation fibers,Nutraceutical powders,Mulch from yard waste,Electronic waste granules,Algae biofuel,Polyester fibers,Biomass briquettes
- Steps before
- Grinding,Size Reduction,Material Preparation,Pre-processing
- Steps after
- Sample Analysis,Packaging,Material Collection,Sieving
- Input ingredients
- soft materials,medium-hard materials,tough materials,elastic materials,fibrous materials,heterogeneous mixes,PET preforms,aluminium slag,animal feed,bones,cables,cardboard,electronic components,feed pellets,foils,food,leather,lignite,material mixtures,non-ferrous metals,paper,pharmaceutical products,plant materials,plastic toys,plastics,polymers,refuse derived fuels,resins,rubber,spices,straw,textiles,waste,wood,fish,nuts,secondary fuels,biofuels
- Output ingredients
- reduced particle size,homogenized samples,uniform particle size,powder
- Speed
- 100 - 3000 min-1
- Drive Power
- 3 kW with flywheel mass ~ 28.5 kg
- Rotor Peripheral Speed
- 4.7 - 20.3 m/s
- Material Feed Size
- < 60 x 80 mm
- Final Fineness
- 0.25 - 20 mm
- Types of Rotors
- Parallel section rotor / 6-disc rotor / V-rotor
- Types of Hoppers
- Universal,Long Stock
- Sieve Sizes
- Trapezoid holes 0.25 / 0.50 / 0.75 / 1.00 / 1.50 mm,Square holes 2.00 / 4.00 / 6.00 / 8.00 / 10.00 / 20.00 mm
- Collector Systems / Capacities
- Collecting receptacle 5 l / optional
- Material of Grinding Tools
- Stainless steel,Steel for heavy-metal free grinding,Tungsten carbide
- Protection Code
- IP 20
- Size (W x H x D Closed)
- 576 (1080 opened) x 1677 x 750 mm
- Net Weight
- ~ 160 kg
- Variable Speed Control
- 100 to 3,000 min-1
- Automation level
- Manual / Electronic Safety Checks
- Easy Operation,Cleaning
- Tool-free dismantling and cleaning
- Batch vs. continuous operation
- Continuous
- Changeover time
- Quick due to easy assembly/disassembly
- Cleaning method
- Manual with fold-back hopper access
- Abrasion resistance
- Suitable for tough,fibrous materials
- Biological compatibility
- Yes,foodGrade version available
- Cleanability
- Easy to clean,smooth surfaces
- Corrosive resistance (e.g. acids)
- 316L stainless steel option
- Density/particle size
- 0.25 - 20 mm final fineness
- Machine Weight
- ~ 160 kg
- Rotor Types
- Parallel section rotor / 6-disc rotor / V-rotor
- Hopper Types
- Universal hopper / Long-stock hopper
- Cyclone Compatibility
- Optional cyclone separator
- Material of Grinding Tools
- Stainless steel / Steel for heavy-metal free grinding / Tungsten carbide
- Market info
- Retsch is renowned for manufacturing high-quality laboratory equipment, specializing in milling, sieving, and assisting technologies for sample preparation and characterization, known for precision, reliability, and innovation in the scientific and industrial laboratory markets.