Retsch Knife Mill GRINDOMIX GM 200, complete with 1 litre grinding container of autoclavable plastic, standard lid and knife of stainless steel, 220–240 V, 50/60 Hz

For chemical and physical analytical methods such as AAS, NIR, ICP or XRF it is essential that the specimen is perfectly homogenized to an adequate degree of analytical fineness.

A reliable and accurate analysis can only be guaranteed by reproducible sample preparation. For these tasks RETSCH offers a comprehensive range of the most modern mills and crushers for coarse, fine and ultrafine size reduction of almost any material. The choice of grinding tools and accessories ensures that our instruments provide for contamination-free and reliable sample preparation prior to laboratory analysis.

RETSCH knife mills provide completely homogeneous and reproducible size reduction results in seconds so that representative samples can be taken from any location in the grinding container.


size reduction, homogenization and mixing
Field of application
agriculture, biology, food, medicine / pharmaceuticals
Feed material
soft, medium-hard, elastic, containing water / fat / oil, dry, fibrous
Size reduction principle
Material feed size*
40 mm
Final fineness*
< 300 µm
Batch size / feed quantity*
with standard lid 700 ml
with reduction lid 300 ml
with gravity lid 300 - 600 ml
Grinding chamber volume
with standard lid 1000 ml
with reduction lid 500 ml
with gravity lid 400 - 800 ml
Speed at 50 Hz (60 Hz)
digital, 2.000 - 10.000 min-1
Material of grinding tools
blade: stainless steel / titanium
fixation of blade: PVDF
container: autoclavable plastic / plastic PP / stainless steel / glass
Setting of grinding time
digital, 1 s - 3 min
Interval operation
Storable SOPs
series-characteristic motor
Drive power
~ 900 W
Electrical supply data
different voltages
Power connection
Protection code
grinding chamber and keypad IP 42
Power consumption
~ 900 W
W x H x D closed
350 x 275 x 392 mm (opened: 350 x 410 x 553)
Net weight
~ 10 kg



Function Principle


Two sharp, robust blades 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 knife is indirectly driven by a powerful motor of 900 W. A pre-selectable speed which is maintained electronically ensures optimum adaptation to individual application requirements as well as reproducible grinding results.

Subject to technical modifications and errors

Call 01463 830401 For Any Assistance

The new knife mill GRINDOMIX GM 200 is the ideal instrument for grinding and homogenizing foods and feeds. It allows to process sample volumesup to 0.7 liters quickly and reproducibly. 

With two sharp, robust blades and a powerful motor, it is ideal for homogenizing substances with a high water, oil or fat content as well as for grinding dry, soft and medium-hard products. A wide selection of lids and containers allows for adaptation of the mill to individual application requirements. The GRINDOMIX GM 200 meets and exceeds all special laboratory and analytical requirements and is a professional device superior to any commercial household mixer.

Application Examples

candy, cereal bars, cereals, cheese, coated tablets, cocoa nibs, deep-frozen products, dietary supplements, dried and fresh fruit, feed pellets, fish, ham, lettuce, meat, nuts, oil seeds, pharmaceutical materials, plant materials, sausages, soap, spices, vegetables, ... continue to application database

Product Advantages

  • efficient size reduction of up to 700 ml feed quantity due to a powerful 900 W motor
  • 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 which come into contact with the sample material are autoclavable
  • perfect adaptation to application requirements by variable speed from 2.000 to 10.000 min-1 with an increment of 500 min-1
  • optional gravitation lid for automatic reduction of the grinding chamber volume
  • 3 SOPs can be stored
  • grinding jar in plastic, stainless steel and glass available


    • SKU
  • Manufacturer
    Retsch GmbH

Accessories GM 200

Grinding containers, 1 litre

03.045.0057 Grinding container, autoclavable plastic (transparent and scratch-resistant)

03.045.0047 Grinding container, PP

03.045.0046 Grinding container, glass

03.045.0050 Grinding container, stainless steel


Lids for grinding containers of autoclavable plastic or PP

Standard lid PP  

Standard lid PP 100 pieces  

Reduction lid PP for chamber reduction to 0.3 litres  

Reduction lid PP for chamber reduction to 0.5 litres  

Gravity lid PP  

Gravity lid PP with overflow channels  


Lids for grinding containers of glass or stainless steel

Standard lid PP  

Standard lid PP 100 pieces  

Gravity lid PP  

Gravity lid PP with overflow channels  



02.446.0047 Knife of stainless steel

02.446.0057 Knife of stainless steel with serrated blades

02.446.0048 Knife of pure titanium for grinding without heavy-metal contamination


Additional items

05.723.0001 Scraper

99.200.0010 IQ/OQ Documentation for GM 200