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Cutting Mill SM 50

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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:

The new SM 50 revolutionizes laboratory workflows and solves multiple problems at the same time. With its innovative design featuring a removable milling chamber, the SM 50 simplifies cleaning, saving up to 30 % process time. At the same time, the unrivaled powerful benchtop cutting mill with a single phase power plug allows up to 100 % sample recovery* and contamination-free sample preparation.

Cutting Mill SM 50 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.
Cutting Mill SM 50 - Stop wasting time

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


Surface cleaning: full access to mill interior, including hopper, with door open for inspection and cleaning with brush, vacuum or compressed air


Intense Cleaning: Comprehensive external cleaning of all grinding tools, including sieve, rotor, cyclone and grinding chamber, all removable without tools using a push-fit system


Parallel cleaning: If a second grinding set is available, samples can be processed directly one after another, thanks to the push-fit grinding tools, including the push-fit milling chamber.

Участвуйте и побеждайте! Win one of three SM 50

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.
Cutting Mill SM 50 - Stop losing material

Cyclone technology, small distances and minimized surface areas optimize the material flow in the mill and enables up to 100 % sample recovery.*

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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.


Push-fit milling chamber can be cleaned outside the machine using e.g. water.

Stop compromising

The SM 50 expertly merges the compactness of benchtop-mills with the high-capacity performance of floor-standing mills. Unlike other benchtop models, it can grind large monolithic samples, thanks to its expansive hopper and chamber volume. Precision. Power. Performance. Nothing less than exceptional results. And there are many more reasons to choose the new SM 50.

  • 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.
Cutting Mill SM 50 - Stop compromising


Large rotor diameter and high speed leads to exceptional high cutting speed for high cutting power.

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For the SM 50 a wide range of accessories is available including

  • 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.
Push-fit Milling Chamber

1 | Push-fit Milling Chamber

The removable push-fit milling chamber, available in various materials, prevents contamination and allows quick setup changes. External cleaning ensures complete residue removal, enhancing contamination-free sample preparation.

EasyInspect Hopper

2 | EasyInspect Hopper

The EasyInspect hopper enables loading of up to 200 ml sample volume or single samples up to 50 mm. It operates on a batch feed basis and features a flow control gate for optimum grinding performance and cyclone efficiency further providing safety protection against injury. A one-hand plunger system controls sample flow, while a flap guides bulky materials into the milling channel.

Integrated cyclone

3 | Integrated cyclone

The compact, push-fit cyclone is integrated into the machine housing for easy cleaning and minimal sample loss. Designed with just two components (lid and body), it allows quick removal and simple assembly. A GL55 thread enables attachment of 250 / 500 ml glass bottles or a 3 liter receptacle via adapter.

Cutting Mill SM 50 Примеры применения

The high cutting performance of the SM 50 makes it ideal for applications in industries such as agriculture, recycling, food and feed, and pharmaceuticals. The shearing and cutting action, the clever design and the wide range of accessories make it possible to grind soft, medium-hard, tough, elastic and fibrous materials.

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The Cutting Mill SM 50 utilizes cutting and shearing forces to achieve size reduction. Samples are fed in batches through the EasyInspect hopper and transported to the milling chamber using a plunger. Within the chamber, the sample is comminuted between rotor blades and stationary double-acting cutting bars. The 3-disc rotor is equipped with spirally arranged reversible hard metal plates that cut sequentially, while the parallel section rotor delivers a robust cutting action for efficient comminution.

Cyclone technology aids in transferring material from the milling chamber to the receptacle, supported by specific air vents that optimize sample discharge. With a variable speed range from 500 to 4,000 rpm, the SM 50 is easily adaptable to a variety of application requirements.


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