Cutting mills are suitable for the grinding of soft, medium-hard, tough, elastic, fibrous, and heterogeneous mixes of products. Thanks to the powerful 3 kW drive with high torque and RES technology, the Cutting Mill SM 300 excels especially in the tough jobs where other cutting mills fail. This mill allows for perfect adaptation to application requirements by variable speed from 100 to 3,000 min-1. A range of bottom sieves with aperture sizes from 0.25 - 20 mm is available, ensuring a defined final fineness.
Cutting Mill SM 300 Reviews from our customers
"It is a very robust mill that allows us to homogenize samples with a very uniform particle size according to the sieve used and very easy to use. Since it is a very robust equipment, as it is made to last, definitely I would recommend."
Jonatan Racancoj
Cempro-Proverde
"This mill is the work horse of the department. It can handle almost everything you want to put through it. Easy to take apart and clean. I have worked with other mills in the past and this one is by far the best."
Jason Roys
Covance
"Before our acquisition of the SM 300, we were using a VitaMix to convert structured components into powder. Of course, that took ages for larger batches of material. Now, with the mill, we are able to save on time and energy. It is a must purchase for any business that needs to cut, powder, mill, eviscerate, or otherwise reduce large particles in any way."
Major Hillmann
Epiceutical Labs
HIGH TORQUE & RES TECHNOLOGY
An additional flywheel mass accounts for a very high torque which enables the SM 300 to grind many materials to analytical fineness in only one working run (RES Technology, see graphic on the right). The extra peak power derived from the flywheel mass is used to overcome potential blockages, even when grinding particularly tough materials. Additionally, the RES technology enables quick sample feeding.
The diagram shows the torque (green) and the power (blue) of the drive as well as the temporarily achievable peak power (red) against the speed. The peak power increases over the entire speed range. That means, the higher the speed, the more power is temporarily available for the cutting events.
Cutting Mill SM 300 Our most powerful cutting mill for a wide range of applications
This video shows the amazing versatility of the SM 300 cutting mill, with a wide range of accessories including different hoppers, collection vessels and rotors to facilitate the feeding and collection of sample materials of different shapes, sizes and quantities. The variable speed allows the perfect cutting parameters to be selected, and the powerful 3 kW motor with RES technology gives the mill maximum pulling power.
Watch the video to see how the SM 300 handles these 8 applications with flying colours:
- Wood chips: Efficient size reduction of larger sample volumes
- PC boards: Pulverising solid PCBs with the 6-disc rotor for precious metal analysis
- Leather and table tennis balls: Comminution of textiles and rubber using the cyclone for rapid sample discharge from the grinding chamber
- Secondary fuels: Efficient comminution of highly heterogeneous materials for rapid calorific analysis
- Hay: Reproducible size reduction of fibrous, light and voluminous materials
- Injection moulding sprues: Grinding at low speeds to minimise fines (dust) content
- Toys: crushing of tough plastics by embrittling samples with liquid nitrogen
The SM 300 delivers perfect results even for the most demanding grinding tasks!
Cutting Mill SM 200 Superiority in Detail
Ideal for light & heat-sensitive materials
Instead of the gravity outlet, an optionally available cyclone separator can be connected to the SM 300. The use of the cyclone is advantageous, for example, for light and heat-sensitive samples.
- Increased throughput
- Improved sample discharge from the grinding chamber
- Efficient cooling of sample and cutting tools
- Collecting vessels with 0.25 - 0.5 - 1 - 2 - 5 and 30 liters are available for the cyclone unit
The SM 300 is equipped with double acting cutting bars which substantially increase the number and effectiveness of the cutting events. The parallel section rotor, for example, generates 18 cutting events per rotation.
Cutting Mill SM 300 Easy Operation & Cleaning
Convenient operation
Operation of the SM 300 is exceptionally simple and safe. The push-fit rotor and bottom sieves can be easily removed without tools. A safety switch prevents the mill from being started with the door open. An electronic safety check ensures that the door cannot be opened when the motor is running.
Quick and easy cleaning
The hopper can be folded back to get full access to the grinding chamber which, in combination with the smooth surfaces, greatly facilitates cleaning the mill. So does the design of the bottom sieves which reduces trapping of sample pieces to a minimum.
Speed Reduction - Less Fines, Less Temperature Rise
Reduction of the speed leads to a decreased fine fraction of the sample and to more particles within the desired size range. Especially for this type of application, the lowest speed of the SM 300 was reduced to 100 min-1. This is also beneficial for grinding heat-sensitive materials: reduced speed results in less energy input, preventing the sample from getting too warm during the process.
316L Stainless Steel Version foodGrade
For applications like small scale production of food or cosmetics, the SM 300 is available in a stainless steel 316L foodGrade version which meets the guidelines of the food and pharma industry. It is equipped with a long-stock hopper for easy feeding of materials like cannabis plant parts. All parts in contact with the sample are made of 316L in this configuration. Optionally, the rotor blades and the cutting bars are made of a FDA-certified stainless steel which is less prone to wear under constant stress than 316L.
The unit can be equipped with an optional cyclone and a large 30 l receptacle (both stainless steel 316L) for collecting large sample amounts. Smooth surfaces lead to almost 100% sample recovery and easy cleaning.
Cutting Mill SM 300 Accessories for safe and effective grinding processes
The SM 200 can be equipped with different rotors, hoppers and bottom sieves. The mill and accessories, including cutting bars and cutting plates, are also available in versions for heavy-metal-free size reduction.
Rotor Types
A parallel section rotor and a 6-disc rotor are available in stainless and heavy-metal-free steel for optimum adaptation to sample properties.
Hopper Types
The SM 300 can be equipped either with the universal hopper, which is suitable for most samples, or the long-stock hopper which is specially designed for long samples.
Bottom Sieves
The bottom sieves with trapezoid or square holes are made of stainless steel or heavy-metal-free steel.
Cutting Mill SM 300 Typical Sample Materials
RETSCH cutting mills are suitable for a vast range of applications. Typical materials include 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, etc.
Parsley 1
Parsley 2
To find the best solution for your sample preparation task, visit our application database.
Cutting Mill SM 300 Functional Principle
Size reduction in the Cutting Mill SM 300 takes place by cutting and shearing forces. The sample comes into contact with the rotor, and is comminuted between the blades and the stationary double acting cutting bars inserted in the housing.
In the 6-disc rotor, spirally arranged reversible hard metal plates operate by cutting in sequence.
The knives of the parallel section rotor carry out comminution with a powerful cutting action. An additional flywheel mass (RES technology) on the drive shaft produces the exceptional performance of the SM 300. Thanks to the variable speed from 100 to 3,000 min-1, the SM 300 can be easily adapted to different application requirements
Cutting Mill SM 300 Technical Data
| Applications: | size reduction by cutting |
|---|---|
| Field of application: | agriculture, biology, chemistry / plastics, engineering / electronics, environment / recycling, food, medicine / pharmaceuticals |
| Feed material: | soft, medium-hard, tough, elastic, fibrous |
| Size reduction principle: | shearing, cutting |
| Max. feed size: | < 60 x 80 mm |
| Final fineness: | 0.25 - 20 mm |
| Speed at 50 Hz (60 Hz): | 100 - 3000 min-1 |
| Rotor peripheral speed: | 4.7 - 20.3 m/s |
| Rotor diameter: | 129.5 mm |
| Types of rotors: | parallel section rotor / 6-disc rotor / V-rotor |
| Types of hoppers: | universal, long stock |
| Material of grinding tools: | stainless steel, steel for heavy-metal free grinding, tungsten carbide |
| 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: 30 l collecting unit 0.25 / 0.5 l cyclone-suction combination (0.25 l - 30 l) |
| Drive: | 3-phase asynchronous motor with frequency converter |
| Drive power: | 3 kW with flywheel mass ~ 28.5 kg |
| Electrical supply data: | different voltages |
| Power connection: | 1-phase |
| Engine brake: | yes |
| Protection code: | IP 20 |
| W x H x D closed: | 576 (1080 opened) x 1677 x 750 mm (with base frame and universal hopper) |
| Net weight: | ~ 160 kg |
| Standards: | CE |
Cutting Mill SM 300 Downloads
Cannabis - Sample Preparation and Quality Control
RETSCH is putting to use its full product portfolio of grinders, sieve shakers and sample dividers to help process and prepare cannabis samples. The sample preparation process needs to be adjustable to the considerable complexity of the various matrices.
Expert Guide Milling
Why Size Reduction? A reliable and accurate analysis can only be guaranteed by reproducible sample preparation. The "Art of Milling" describes the process of turning a laboratory sample into a representative part sample with homogeneous analytical fineness.
General Catalogue
Product data sheet SM 300
Product Overview
The Sample - Customer Magazine No. 43
Reproducible sample preparation with RETSCH laboratory mills