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Knife Mill GRINDOMIX GM 300 Professional Food Sample Preparation

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With its special cutting knife system and variable-volume grinding chamber, the laboratory knife mill GRINDOMIX GM 300 processes a great variety of sample materials quickly and reproducibly to completely homogeneous analytical samples – within seconds!

Thanks to the 5000 ml grinding chamber volume, this mill easily homogenizes an entire loaf of bread or a complete pizza in one working run.

Thanks to reproducible setting of parameters and programs, the knife mill GM 300 ensures analytical results with minimum standard deviation. These features plus the wide selection of lids and containers, allowing for adaptation of the mill to individual application requirements, make the GRINDOMIX GM 300 a professional device superior to any commercial household mixer.

CRYOGENIC GRINDING WITH DRY ICE

Tough or elastic materials which cannot be homogenized at room temperature, are safely and effectively homogenized in the knife mill GM 300 with the help of dry ice. For this application, a special cryo lid with a small opening to allow for possible overpressure to escape is available. Used in combination with a stainless-steel  container and full metal knife, it ensures safe and efficient cold grinding. 

Gravity lid enables variable volume of the grinding chamber 

RETSCH has developed a gravity lid for the GRINDOMIX knife mills which reduces the volume of the grinding container, preventing the sample from escaping the homogenization process by clinging to the container walls. The lid drops under its own weight during grinding and always rests directly on the sample. The result is thorough homogenization of the complete sample material. The gravity lid is also available with overflow channels. It ensures that the cell liquid released by the sample during grinding is returned through these channels to the center of the container, allowing for perfect homogenization.

Gravity lid enables variable volume of the grinding chamber 
  • Gravity lid made of autoclavable plastic

Automatically adjusts the grinding chamber volume to the changing sample volume.

  • Gravity lid with overflow channels

Ideally suited to homogenize samples with a high water content.

  • Special lid for dry ice applications

Made of autoclaveable plastic, it allows possible overpressure to escape through a small opening.

  • Stainless steel container

Minimum wear when hard sample materials are processed.

  • Knives

4 different knives available: stainless steel, stainless steel with serrated blades, full metal blades & cylinder, with titanium-niobium coating for heavy-metal-free size reduction. All are autoclavable.

  • Scraper

Facilitates the recovery of sticky samples from the container.

Accessories & Options

Knife Mill GRINDOMIX GM 300 Typical Sample Materials

RETSCH knife mills are suitable for a vast range of applications. Typical materials include candy, cereals, cheese, coated tablets, cocoa nibs, dietary supplements, dried and fresh fruit, feed pellets, fish, frozen products, ham, lettuce, meat, nuts, oil seeds, pharmaceutical products, plant materials, sausages, soap, spices, vegetables etc.

cabbage

cabbage

wine gum

wine gum

cocoa filter cake

cocoa filter cake

 fish

fish

To find the best solution for your sample preparation task, visit our application database.

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Citations

Our instruments are recognized as the benchmark tools for a wide range of application fields in science and research. This is reflected by the extensive citations in scientific publications. Feel free to download and share the articles provided below.

The laboratory knife mill GM 300 features four sharp, robust blades, which rotate in the center of the grinding container. Depending on the rotational direction, size reduction is effected with the blunt side (preliminary size reduction) or the sharp side (fine grinding). The knifes are protected with a counterblade from damages by hard sample materials.

The knife is indirectly driven by a powerful motor of 1.1 kW which can reach temporary peaks of 3 kW. A pre-selectable speed which is maintained electronically ensures reproducible results.

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