MM 500 Mixer Mill

The mixer mill MM 500 is a compact, versatile bench-top unit which has been developed specially for dry, wet and cryogenic grinding of up to 2 x 45 ml sample material within seconds.

With a maximum frequency of 35 Hz, it generates enough energy to produce particles in the nanometer range. The robust high-performance drive makes the mill suitable for long-term grinding processes up to 99 hours. Hence, the MM 500 is the first mixer mill in the market to provide a real alternative to grinding in a planetary ball mill – with more comfortable handling and less warming effects.

Application Examples

Alloys, Animal Feed, Bones, Ceramics, Chemical Products, Coal, Coke, Drugs, Electronic Scrap, Glass, Grains, Hair, Minerals, Oil Seeds, Ores, Paper, Plant Materials, Plastics…

Product Advantages

  • Machine
  • Powerful grinding by impact and friction with up to 35 Hz
  • Pulverization of two samples down to the nanometer range < 0.1 µm
  • Suitable for long-term grinding processes up to 99 h
  • Suitable for mechanochemistry applications
  • Batch size max. 2 x 45 ml
  • User-friendly clamping system
  • 3 different grinding modes (dry, wet or cryogenic)
  • Memory for 12 SOPs and 4 program cycles
  • Wide range of accessories including various jar and ball sizes, grinding tool materials, CryoKit
  • Convenient operation via 4.3″ touch display
  • Can be controlled via RETSCH App
  • Screw-Lock jars
  • Pressure-tight up to 5 bar
  • Grinding under inert gas (optional)
  • Jar design allows full use of the volume, also for wet grinding
  • Jars remain conveniently clamped for periodic sample extraction or visual checks

Function Principle

The grinding jars of the mixer mill MM 500 perform radial oscillations in a horizontal position. The inertia of the grinding balls causes them to impact with high energy on the sample material at the rounded ends of the grinding jars and pulverize it.

Also, the movement of the grinding jars combined with the movement of the balls result in the intensive mixing of the sample. The degree of mixing can be increased even further by using several smaller balls.

Applications: mechanochemistry, mechanical alloying, size reduction, mixing, homogenization, cryogenic grinding
Field of application: agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, food, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals
Feed material: hard, medium-hard, soft, brittle, elastic, fibrous
Size reduction principle: impact, friction
Material feed size* <= 10 mm
Final fineness*: ~ 0.1 µm
Batch size / feed quantity*: max. 2 x 45 ml
No. of grinding stations: 2
Setting of vibrational frequency: digital, 3 – 35 Hz (180 – 2100 min-1)
Typical mean grinding time: 30 s – 2 min
Dry grinding: yes
Wet grinding: yes
Cryogenic grinding: yes
Cell disruption with reaction vials:
Self-centering clamping device: yes
Type of grinding jars: screw-lock with integrated safety closure devices
Material of grinding tools: hardened steel, stainless steel, tungsten carbide, zirconium oxide
Grinding jar sizes: 50 ml / 80 ml / 125 ml
Setting of grinding time: digital, 10 s – 8 h
Total grinding time: 99 h
Storable SOPs: 12
Number of storable cycle programs: 4 (with 99 repeats)
Electrical supply data: 100-120V, 50/60 Hz; 200-230V, 50/60Hz
Power connection: 1-phase
Protection code: IP 30
Power consumption: 750 W
W x H x D closed: 690 x 375 x 585 mm
Net weight: ~ 60 kg
Standards: CE