Retsch High Energy Ball Mill Emax, 200–240 V, 50/60 Hz, High energy ball mill with 2 grinding stations

(please order grinding jars and balls [up to 15 mm] separately) 

A ball mill for powerful size reduction and homogenization

RETSCH ball mills are available as mixer mills as well as planetary ball mills.

Mixer Mills grind and homogenize small sample volumes quickly and efficiently by impact and friction. They are suitable for dry, wet and cryogenic grinding as well as for cell disruption for DNA/RNA recovery.

RETSCH’s innovative Planetary Ball Mills meet and exceed all requirements for fast and reproducible grinding down to the nano range. They are used for the most demanding tasks, from routine sample processing to colloidal grinding and advanced materials development.

The High Energy Ball Mill Emax is an entirely new type of mill for high energy input. The unique combination of high friction and impact results in extremely fine particles within the shortest amount of time.


Applications nano grinding, size reduction, homogenizing, mechanical alloying, colloidal milling, high energy comminution
Field of application agriculture, biology, Chemistry, construction materials, engineering / electronics, environment / recycling, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals
Feed material medium-hard, hard, brittle, fibrous - dry or wet
Size reduction principle impact, friction
Material feed size* < 5 mm
Final fineness* < 80 nm
Batch size / feed quantity* max. 2 x 45 ml
Speed at 50 Hz (60 Hz) 300 - 2000 min-1
Cooling controlled integrated water cooling / option: external chiller
Temperature control yes (min and max temperature may be defined)
No. of grinding stations 2
Type of grinding jars with integrated safety closure devices
Material of grinding tools stainless steel, tungsten carbide, zirconium oxide
Grinding jar sizes 50 ml / 125 ml
Setting of grinding time 00:01:00 to 99:59:59
Interval operation yes, with optional direction reversal
Interval time 00:01:00 to 99:59:59
Pause time 00:01:00 to 99:59:59
Storable SOPs 10
Interface USB / LAN ( RJ45)
Drive 3-phase asynchronous motor with frequency converter
Drive power 2600 W
Electrical supply data different voltages
Power connection 1-phase
Protection code IP 30
Power consumption ~ 3100W (VA)
W x H x D closed 625 x 525 x 645 mm
Net weight ~ 120 kg
Standards CE
Patent / Utility patent Inclined Grinding bowls (US 8,042,754 B2)


Function Principle


The novel size reduction mechanism of the Emax unites the advantages of different mill types: high-frequency impact (mixer mill), intensive friction (vibratory disc mill) and controlled circular jar movements (planetary ball mill) allow for unrivaled grinding performance. This unique combination is generated by the oval shape and the movement of the grinding jars. The grinding jar supports are mounted on two discs respectively which turn in the same direction. As a result, the jars move on a circular course without changing their orientation.

The interplay of jar geometry and movement causes strong friction between grinding balls, sample material and jar walls as well as a rapid acceleration which lets the balls impact with great force on the sample at the rounded ends of the jars. This significantly improves the mixing of the particles resulting in smaller grind sizes and a narrower particle size distribution than has been possible to achieve in ball mills so far.



Call 01463 830401 For Any Assistance

The Emax is an entirely new type of ball mill for high energy milling. The unique combination of high friction and impact results in extremely fine particles within the shortest amount of time.

The high energy input is a result of an unrivaled speed of 2000 min-1 and the optimized jar design. Thanks to the revolutionary cooling system with water, the high energy input is effectively used for the grinding process without overheating the sample. Due to the special grinding jar geometry, the sample is thoroughly mixed which results in a narrow particle size distribution.

Unlike other high energy ball mills, the Emax is capable of continuous grinding operation without interruptions for cooling down. This dramatically reduces the grinding time. The high energy input in combination with the unique cooling system provides perfect conditions for effective mechanical alloying or grinding down to the nanometer range.

A wealth of safety features such as the integrated safety closure of the grinding jar, temperature control with automatic start/stop system, and integrated imbalance controls make operation of the bench-top mill Emax very user-friendly.

Application Examples

alloys, bones, carbon fibres, catalysts, cellulose, cement clinker, ceramics, chemical products, clay minerals, coal, coke, concrete, fibres, glass, gypsum, iron ore, kaolin, limestone, metal oxides, minerals, ores, paper, pigments, plant materials, polymers, quartz, semi-precious stones, sewage sludge, slag, soils, tea, tobacco, waste samples, wood, ...continue to application database

Product Advantages

  • faster and finer grinding than any other ball mills
  • speed of 2000 min-1 allow for ultra-fast pulverization of the sample
  • water cooling permits continuous operation without cool down breaks
  • temperature-controlled grinding
  • narrow particle size distribution thanks to special jar design which improves mixing of the sample
  • patented drive concept
  • easy operation via touch screen, 10 SOPs storable
  • operation with 2 grinding jars
  • easy installation of grinding jars
  • jars with integrated safety closure
  • range of jar materials allow for contamination free grinding



    • SKU
  • Manufacturer
    Retsch GmbH

Grinding jars Emax

Stainless steel

01.462.0305 50 ml

01.462.0313 125 ml


Tungsten carbide

01.462.0317 50 ml


Zirconium oxide

01.462.0312 50 ml

01.462.0307 125 ml


Accessories for grinding under inert atmosphere

Aeration lid for Emax grinding jar 50 ml, stainless steel

Aeration lid for Emax grinding jar 125 ml, stainless steel

Aeration lid for Emax grinding jar 50 ml, zirconium oxide

Aeration lid for Emax grinding jar 125 ml, zirconium oxide


Additional items Emax

Cooling lubricant, 50 ml

05.114.0057 O-ring for grinding jars 50 ml, 1 piece

O-ring for grinding jars 125 ml, 1 piece


Pressure and temperature measuring system GrindControl

incl. measuring transceiver, stationary transceiver, software, case and grinding jar for Emax
GrindControl with Emax grinding jar 125 ml, stainless steel

GrindControl with Emax grinding jar 125 ml, zirconium oxide


Grinding balls


Stainless steel

22.455.0010 2 mm Ø, 500 g (approx. 110 ml)

22.455.0011 3 mm Ø, 500 g (approx. 120 ml)

22.455.0002 3 mm Ø, 200 pieces (approx. 6 ml)

22.455.0001 4 mm Ø, 200 pieces (approx. 14 ml)

22.455.0003 5 mm Ø, 200 pieces (approx. 25 ml)

05.368.0034 5 mm Ø

05.368.0035 7 mm Ø

05.368.0063 10 mm Ø

05.368.0037 12 mm Ø

05.368.0109 15 mm Ø


Tungsten carbide

22.455.0006 3 mm Ø, 200 pieces (approx. 6 ml)

22.455.0005 4 mm Ø, 200 pieces (approx. 14 ml)

22.455.0004 5 mm Ø, 200 pieces (approx. 25 ml)

05.368.0038 5 mm Ø

05.368.0039 7 mm Ø

05.368.0071 10 mm Ø

05.368.0041 12 mm Ø


Zirconium oxide

32.368.0005 0.1 mm Ø, 0.5 kg (approx. 135 ml)

32.368.0003 0.5 mm Ø, 0.5 kg (approx. 135 ml)

32.368.0004 1 mm Ø, 0.5 kg (approx. 135 ml)

05.368.0089 2 mm Ø, 0.5 kg (approx. 135 ml)

05.368.0090 3 mm Ø, 0.5 kg (approx. 140 ml)

05.368.0094 10 mm Ø

05.368.0096 12 mm Ø

05.368.0113 15 mm Ø