Cutting Mill SM 50

Many laboratories face these challenges:

• Time losses due to complex cleaning and reassembly
• Sample losses caused by hidden residues in hard-to-reach areas
• Limited flexibility when processing various materials
• Risk of contamination that can distort analysis results

RETSCH tackles challenges:

A single solution for everything

• The SM 50 is the world's most powerful benchtop cutting mill with a standard one phase power plug. Its 1.5 kW motor drives a large rotor, delivering impressive high-speed cutting power. The max. speed is 4,000 rpm and can be adjusted to suit various applications.
• The EasyInspect hopper operates on a batch-wise feeding system and can process large sample pieces up to 50 mm with ease. The compact powerhouse features an internal cyclone system, ensuring effortless and efficient processing of various materials.
• Sieves with apertures from 0.25 mm to 10 mm allow a final fineness of less than 250 µm, depending on the feed material. A two-step grinding process allows fine particles to be produced by first using a large aperture sieve, followed by a finer one. The design supports high throughput with large sieve areas of 48 mm x 120 mm.

Cutting Mill SM 50

Everything in view

World innovation: When opening the machine door, the front of the hopper swings out to the side, providing full visibility inside. The Total Access Concept ensures easy inspection and cleaning of all sample-contacting components.

Stop wasting time

Up to 30 % time savings on cleaning with the Total Access Concept and push-fit components.

• The push-fit system allows rotor, sieves, cyclone and milling chamber to be removed without tools.
• For the first time, the milling chamber can be removed as well, making complete cleaning easy and significantly reducing machine downtime.
• EasyInspect hopper fully opens for inspection and cleaning, ensuring quick cleaning.
• No more hard-to-reach pipes or hoses – the SM 50 integrates the cyclone directly into the machine.
• Intuitive operation via touch display and push button, allowing effortless speed adjustments.

Thanks to the Total Access Concept and removable milling chamber process time is significantly reduced in the SM 50

Three Options for the cleaning operation

Up to 100 % sample recovery*

Stop losing material

• Compared to milling without cyclone technology, the recovery of sample material is significantly improved. The cyclone technology efficiently transports the sample into the receptacle with no dust release and minimal sample residue left in the mill.
• The integrated cyclone eliminates the need for connecting elements such as pipes or hoses and minimizes distances and surface areas.
• The batchwise feeding of the hopper concept serves as a flow control gate and optimizes the grinding performance and separation efficiency of the cyclone

Stop manual pre-cutting

• Dense monoliths: Dog biscuits, roots, wood pieces
• Tough polymers: Plastic components, rubber compounds, children toys, household items
• Hard & brittle components: electronic parts, LN2 embrittled samples

Stop contamination

Maximum safety, even with frequent sample material changes 

1. Cleaning on a new level: All grinding tools are easily accessible and can be reliably cleaned of persistent residues. For the first time, the milling chamber can be cleaned separately as well, further preventing cross-contamination from previous milled samples.
2. The push-fit milling chamber is available in various materials, such as stainless steel for abrasion-resistant grinding or aluminum for standard applications as well as for grinding without heavy-metal contamination, allowing a flexible setup in one mill.

Stop compromising

• 1.5 kW drive with variable speed for highly efficient size reduction.
• Maximum speed of 4,000 rpm for exceptional cutting performance
• Large 130 mm rotor diameter and depth of 48 mm for high impact power and fast sample throughput (comparable to large floor-standing cutting mills).
• Superior cutting speed of 27 m/s.
• 3 double acting cutting bars result in 18 cutting events per round and a specific cutting length of 864 mm per round for superior cutting efficiency.
• Optimized design reduces blockages and guarantees smooth operation
• Comprehensive and convenient door opening mechanisms with a pivoting handle.

Wide range of accessories for highest flexibility

• Push-fit milling chamber of three different materials for standard applications, abrasive and corrosion-resistant applications, and for grinding without heavy-metal contamination.
• The integrated cyclone ensures complete sample recovery.
• Gravity chamber for grinding without cyclone, where the receptacle is placed directly underneath the machine so that the material falls in by gravity. Only suitable for applications requiring coarse pre-grinding of non-dusty materials.
• Parallel-section rotor and 3-disc rotor designed for processing materials ranging from soft to hard properties.
• 9 different sieve sizes from 10 mm down to 0.25 mm for standard application or for grinding without heavy-metal contamination.
• Collecting systems are available in 0.25 and 0.5 l capacities for glass collection, as well as a 3 l container.

Attention to detail: special features for superior performance

Explore the various clever design elements that contribute to the exceptional performance of the SM 50 Cutting Mill

1. Rotor Shaft Release: The rotor shaft can be released using a touch display function for easy cleaning or rotor mounting.
2. Hopper Flap: Assists in pushing fluffy materials into the milling chamber efficiently.
3. Removable Plunger: The plunger can be detached by loosening just one screw for quick access.
4. Inspection Opening: Allows inspection and cleaning of channels that connect to the vacuum cleaner.
5. Touch Display with rotary push button: Provides intuitive control and operation of the machine's functions.
6. Gravity Chamber: Utilizes gravity to assist in material flow for coarse pre-crushing tasks of non-dusty materials.

Application Examples

Functional Principle

Technical Data