Knife mill GRINDOMIX GM 300

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.

FOR LARGE FOOD SAMPLES

• Efficient size reduction of up to 4500 ml feed quantity due to powerful 1.1 kW motor (peak power input >3 kW)
• Pre- and fine grinding in one mill: cutting action in regular mode, grinding by impact in reverse mode, pre-grinding in interval mode
• All parts in contact with the sample material are autoclavable
• Perfect adaptation to application requirements by variable speed from 500 to 4000 min-1 with an increment of 100 min-1
• Optional gravity lid for automatic reduction of chamber volume
• 10 SOPs can be stored
• Grinding jar in plastic and stainless steel available

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.

EASY AND SAFE OPERATION

Operation of the laboratory knife mill GRINDOMIX GM 300 is exceptionally comfortable and safe. The grinding container and knife are easily attached without tools. When the set time has expired, the motor is automatically switched off and the container can be removed. Thus, the GRINDOMIX, unlike many commercial household mixers, allows filling and emptying the container outside the mill. The knife remains on the knife holder during the process and can be easily removed for cleaning afterwards. Thanks to this quick and easy procedure, cross contaminations caused by sample residues are successfully prevented. Another advantage of the GRINDOMIX knife mills: the grinding tools are autoclavable. The GM 300 features a convenient 1-button operation with graphic display. All parameters are digitally set and 10 Standard Operating Procedures (SOPs) can be stored.

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.

ACCESSORIES & OPTIONS

A range of different containers, lids and knives makes the GRINDOMIX GM 300 a truly universal device. The selection of the grinding container depends on the products to be processed. Standard plastic containers are suitable for the majority of applications. Other accessories are available for special applications.

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.

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.

TECHNICAL DATA

FUNCTIONAL PRINCIPLE