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 | Mortar Grinder RM 200 | Cyclone Mill TWISTER | Planetary Ball Mill PM 300 | Ultra Centrifugal Mill ZM 200 |
| Citations | | | | |
| Catalog Number | RM 200 | Twister | PM 300 | ZM 200 |
| Price | | | | |
| Description | 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 | 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 Planetary Ball Mill PM 300 is a powerful and ergonomic benchtop model with two grinding stations for grinding jar volumes up to 500 ml. This setup allows for processing up to 2 x 220 ml sample material per batch. Thanks to the high maximum speed of 800 rpm, extremely high centrifugal forces The Planetary Ball Mill PM 300 is a powerful and ergonomic benchtop model with two grinding stations for grinding jar volumes up to 500 ml. This setup allows for processing up to 2 x 220 ml sample material per batch. Thanks to the high maximum speed of 800 rpm, extremely high centrifugal forces result in very high pulverization energy and consequently in short processing times. The PM 300 is ideally suited for virtually all industries where the quality control process places the highest demands on purity, speed, fineness and reproducibility. Thanks to its enormous energy input of up to 64.4 times the acceleration of gravity, this mill is the perfect choice for tasks in research like mechanochemistry (mechanosynthesis, mechanical alloying and mechano-catalysis), or for ultrafine colloidal grinding on a nanometer scale.- powerful grinding by impact and friction with up to 800 rpm
- pulverization of two samples down to 100 nm
- jars from 12-500 ml
- adapter for keeping 2 ml gas chromatography glass vials for cocrystal screening
- high energy input of up to 64.4 g
- suitable for mechanochemistry applications and mechanical alloying
- Ergonomic clamping unit with smooth surfaces
- Automatic grinding chamber ventilation with directed air stream for perfect jar cooling
- The Safety Slider prevents starting the machine without securely clamped jars, perfect stability on the lab bench thanks to FFCS -technology
- Comfortable parameter setting via Touch display
- 2 different grinding modes (dry, wet)
- memory for 12 SOPs and 4 program cycles
- 5 different jar materials
jars of 12 – 80 ml can be stacked (two jars each)
... Read More | The Ultra Centrifugal Mill ZM 200 is a high speed rotor mill with unmatched performance. It is used for the rapid size reduction of soft to medium-hard and fibrous materials.
Because of the efficient size reduction technique the ZM 200 ensures the gentle preparation of analytical samples in a very The Ultra Centrifugal Mill ZM 200 is a high speed rotor mill with unmatched performance. It is used for the rapid size reduction of soft to medium-hard and fibrous materials.
Because of the efficient size reduction technique the ZM 200 ensures the gentle preparation of analytical samples in a very short time. The comprehensive range of accessories including a large variety of ring sieves and rotors as well as collection systems makes the Ultra Centrifugal Mill a versatile instrument that can be easily adapted to varying applications. The optional Vibratory Feeder is load-controlled via an interface and ensures a uniform grind at maximum output rate. With thousands of installations, the ZM 200 has become a standard for food and feeds, for the chemical industry as well as for agricultural testing.
Features - Powerdrive with optimally matched frequency converter and 3-phase motor
- Comfortable parameter setting via display and ergonomic 1-button operation
- Wide range of accessories including various collection and feeding systems, rotors and sieves
- Gentle and very rapid size reduction by pre- and fine grinding in one run
- Wide speed range
- Patented cassette system for maximum sample recovery and easy cleaning
- Easily exchangeable grinding and sieve inserts
- Defined final fineness due to ring sieves sieves with aperture sizes from 0.08 - 10 mm
- Comfortable safety housing with automatic cover closure
- Motor compartment and electronics protected against dust and material penetration
... Read More |
| Principle | Pressure and Friction | Impact and Friction | Impact and Friction | Impact and Shearing |
| Sample Size | < 8 mm | <10 mm | ≤10 mm | < 10 mm |
| Sample Type | Soft, Hard, Brittle or Pasty | Fibrous or Soft | Hard, Medium-Hard, Soft, Brittle, Fibrous | Soft, Medium-Hard, Brittle or Fibrous |
| Applications | Grinding, Mixing and Triturating - Dry and Wet: Agriculture, Biology, Chemistry / Plastics, Construction Materials, Food, Geology / Metallurgy, Glass / Ceramics, Medicine / Pharmaceuticals | Grinding Prior to NIR Analysis: Agriculture, Foods / Feeds, 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, cocrystalscreening | Fine Grinding: Agriculture, Biology, Chemistry / Plastics, Construction Materials, Engineering / Electronics, Environment / Recycling, Food, Geology / Metallurgy, Medicine / Pharmaceuticals |
| Speed | 100 min-1 | 10,000 to 14,000 min-1 | max 800 rpm | 6,000 to 18,000 min-1 |
| Rotor Type | mortar and pestle | TWISTER rotor | grinding jar and balls | 6, 12 or 24 tooth rotor, 8 tooth mini-rotor |
| Final Fineness | < 10 um | < 500 um | ~0.1 µm | < 80 nm |
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