Laboratory mills, used primarily for sample prep prior to analysis, use particle size reduction (comminution) to grind or homogenize wet, dry, hard, soft, elastic, brittle, and fibrous materials. Mills and grinders are used in labs in widely varying scientific areas, including chemistry, pharmaceuticals, food analysis, materials testing, and life science. Disk, hammer, mortar, planetary ball, rotor, and cutting mills are available to achieve coarse, mid-range, and fine results, all the way down to the nano range, <0.1 µm. Cryogenic mills, or freezer mills, are a type of unit that freezes a material prior to reducing its particle size.
What to consider when choosing a laboratory mill?
When purchasing a mill, power, speed, and cleanability are useful parameters; however, it is also important to keep in mind the instrument’s throughput, reproducibility, and yield, as well as the option of a cooling system, if necessary.
Compare and request a quote for laboratory mills from various manufacturers:
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| Company | RETSCH | RETSCH | RETSCH | RETSCH |
| Item | Mixer Mill MM 400 | CryoMill | Cyclone Mill TWISTER | Mortar Grinder RM 200 |
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| Catalog Number | MM 400 | CryoMill | Twister | RM 200 |
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| Description | The mixer mill MM 400 is a compact versatile bench-top unit, which has been developed specially for dry, wet and cryogenic grinding of small amounts of sample.
It can mix and homogenize powders and suspensions in only a few seconds. It is also perfectly suitable for the disruption of biological The mixer mill MM 400 is a compact versatile bench-top unit, which has been developed specially for dry, wet and cryogenic grinding of small amounts of sample.
It can mix and homogenize powders and suspensions in only a few seconds. It is also perfectly suitable for the disruption of biological cells as well as for DNA/RNA extraction. With its high performance and great flexibility the MM 400 is a unique product in the market.
Features - Reproducible, efficient grinding, mixing and homogenization in seconds
- Powerful grinding by impact and friction, up to 30 Hz for up to 20 samples per run
- 3 different grinding modes (dry, wet or cryogenic)
- Screw-top grinding jars for leak-proof grinding
- 9 SOPs can be stored
- Wide range of accessories including various jar and ball sizes, adapter racks, grinding tool materials, CryoKit
... Read More | The CryoMill is a laboratory ball mill specifically designed for this application. It features an integrated cooling system which continually cools the grinding jar with liquid nitrogen before and during the grinding process. Thus, the sample is embrittled and volatile components are preserved.
The The CryoMill is a laboratory ball mill specifically designed for this application. It features an integrated cooling system which continually cools the grinding jar with liquid nitrogen before and during the grinding process. Thus, the sample is embrittled and volatile components are preserved.
The liquid nitrogen is continually supplied from an autofill system in the exact amount required to keep the temperature at –196 °C. The CryoMill's versatility makes it the ideal grinder for sample quantities up to 20 ml.- powerful grinding by impact and friction with up to 30 Hz
- pulverization of two samples down to 5 micron
- The user never comes into direct contact with LN2 which ensures a high degree of operational safety
- adapter for keeping 2 ml plastic tubes or 2 ml steel tubes available
- special jar zirconium oxide available for heavy-metal free grinding
- suitable forgrinding in interval
- 3 different grinding modes (dry, wet or cryogenic)
- memory for 9 SOPs
- Screw-Top jars
... Read More | The cyclone mill TWISTER is specially designed for the processing of foods and feeds for subsequent NIR analysis. The optimized form of rotor and grinding chamber generates an air jet which carries the ground sample through the integrated cyclone into the sample bottle. The air jet prevents the The cyclone mill TWISTER is specially designed for the processing of foods and feeds for subsequent NIR analysis. The optimized form of rotor and grinding chamber generates an air jet which carries the ground sample through the integrated cyclone into the sample bottle. The air jet prevents the material from heating up, thus preserving the moisture content.
The provided sieves guarantee an optimum particle size distribution so that it is not necessary to recalibrate the NIR spectrometer. The rotor speed can be adjusted in 3 steps allowing for perfect adaptation to the sample requirements. Cleaning the mill is quick and easy as the air jet effects a complete discharge of the material from the grinding chamber.
This new cyclone mill in proven RETSCH quality optimizes the reproducible sample preparation to NIR analysis thus allowing for meaningful and reliable analysis results.
Features - Ideal for grinding feeds, grains, forage and other similar products
- 3 controlled speeds
- Cyclone separator with 250 ml collecting bottle for quick extraction of sample
- No cross contamination thanks to easy cleaning
- Convenient operating panel
- Professional industrial design with long lifetime
... Read More | The Mortar Grinder RM 200 can mix and homogenize powders, suspension and pastes even with high viscosity. The RM 200 is suitable for the proper and reproducible sample preparation to analytical fineness.
It substitutes cumbersome hand mortars by a high performance drive with electronic control. TheThe Mortar Grinder RM 200 can mix and homogenize powders, suspension and pastes even with high viscosity. The RM 200 is suitable for the proper and reproducible sample preparation to analytical fineness.
It substitutes cumbersome hand mortars by a high performance drive with electronic control. The grinding set can be cooled and heated and is very easy to clean. Grinding sets of various material qualities are available which can be exchanged easily for optimum adaptation to various grinding tasks.
Features - Dry, wet and cryogenic grinding
- Reproducible results due to adjustable pestle and scraper pressure
- Closed, dust tight grinding chamber with windows
- Easy exchange of mortar and pestle without tools
- Performance display for load cotrol
- Adjustable pestle and scraper pressure
- Wide range of materials for contamination free grinding
- 3 scraper materials (vulkollan, beech wood, PTFE)
... Read More |
| Principle | Impact and Friction | Impact and Friction | Impact and Friction | Pressure and Friction |
| Sample Size | < = 8 mm | ≤8 mm | <10 mm | < 8 mm |
| Sample Type | Hard, Medium-Hard, Soft, Brittle, Elastic or Fibrous | Hard, Medium-Hard, Soft, Brittle, Elastic or Fibrous | Fibrous or Soft | Soft, Hard, Brittle or Pasty |
| Applications | Size Reduction, Mixing, Homogenization, Cell Disruption and Cryogenic Grinding: Agriculture, Biology, Chemistry / Plastics, Construction Materials, Engineering / Electronics, Environment / Recycling, Food, Geology / Metallurgy, Glass / Ceramics, Medicine / Pharmaceuticals | mechanochemistry, mechanical alloying, size reduction, mixing, homogenization, cryogenic grinding; agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, food, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals, cell disruption | Grinding Prior to NIR Analysis: Agriculture, Foods / Feeds, Medicine / Pharmaceuticals | Grinding, Mixing and Triturating - Dry and Wet: Agriculture, Biology, Chemistry / Plastics, Construction Materials, Food, Geology / Metallurgy, Glass / Ceramics, Medicine / Pharmaceuticals |
| Speed | 3 to 30 Hz | 3 to 30 Hz | 10,000 to 14,000 min-1 | 100 min-1 |
| Rotor Type | grinding jar and balls | grinding jar and balls | TWISTER rotor | mortar and pestle |
| Final Fineness | ~ 5 um | ~ 5 um | < 500 um | < 10 um |
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