Planetary Micro Mill ​

PULVERISETTE 7

classic line

OVERVIEW

Ideal for smallest quantities

The PULVERISETTE 7 classic line with 2 working stations is ideally suited for fast, uniform, and extremely fine comminution of very small samples down to colloidal fineness of hard, medium-hard, brittle and moist samples. Depending on the desired final fineness can the grinding be performed dry or in suspension.
Besides for comminution, the Planetary Ball Mill can be utilized for mixing and homogenizing of emulsions and pastes.

 

WORKING PRINCIPLE

Comminution according to the Planetary Principle

The comminution of the material to be ground takes place primarily through the high-energy impact of grinding balls. To achieve this, the grinding bowl, containing the material to be ground and grinding balls, rotates around its own axis on a main disk whilst rotating rapidly in the opposite direction.
At a certain speed, with this configuration, the centrifugal force causes the ground sample material and grinding balls to separate from the inner wall of the grinding bowl. The grinding balls then cross the bowl at high speed and further grind the sample material by impact against the opposite bowl wall. In addition, impact between the balls themselves on the sample material adds to the size reduction process.
Due to the enormous rotational speed of the main disk – up to 800 rpm – the PULVERISETTE 7 classic line reaches a centrifugal acceleration of up to 50 g.

FEATURES
  • Rotational speed up to 800 rpm – precise rotational speed regulation with display of set/actual values
  • Fast fine grinding of small quantities
  • Small footprint
  • Simultaneous processing of 2 samples
  • Useful capacity up to 2 x 20 ml
  • Programmable microprocessor control
  • Up to 99 repetitions of the grinding cycle
  • Programme-timer for grinding operation and cooling phases
  • Reversing function
  • Energy-save function (electricity-saving mode)
  • RS232 interface for output of process data and programming cycles
  • Grinding chamber completely encapsulated, but easy to open
  • Cooling of the grinding chamber with a built-in fan for long grinding times
  • Ergonomic IP64 membrane keyboard
  • Maintenance-free drive with asynchronous motor and frequency converter
  • Extensive accessories for simplifying your daily work
    VIEW EXTENSIVE ACCESSORIES
  •  
REPRODUCIBLE GRINDING RESULTS
  • Particularly high grinding performance – low bench space requirements

    The special microprocessor control with up to 99 programmable repetitions of the grinding cycle ensures exceptionally fast, precise, reproducible results. A mill that combines particularly high grinding performance with low bench space requirements!

EQUIPMENT / ACCESSORIES
  • Configure your Planetary Micro Mill PULVERISETTE 7 classic line exactly to your specific application 

    The Planetary Micro Mill PULVERISETTE 7 classic line operates with two grinding bowls of sizes 12 ml or 45 ml, which turn with a transmission ratio 1 : -2 relative to the main disk. To achieve best grinding results and for direct prevention of contamination of the samples due to undesired abrasion, grinding bowls and grinding balls are available in 7 different materials.

    VIEW EXTENSIVE ACCESSORIES

Booking Demo

AT A GLANCE

  • Fast fine grinding with rotational speeds up to 800 rpm
  • Loss-free comminution also below 1 μm
  • Uniform extremely fine comminution of smallest sample amounts
  • Useful capacity up to 2 x 20 ml

IDEAL FOR

GEOLOGY AND MINERALOGY

CERAMICS

CHEMISTRY

BIOLOGY

PHARMACEUTICALS

METALLURGY

MATERIAL TECHNOLOGY

SAMPLE PREPARATION FOR ANALYSIS

TECHNICAL DATA

Working principle

impact force

Optimal for material type
hard, medium-hard, soft, brittle, tough, moist
Number of grinding stations

4

Grinding tools
grinding bowls and grinding balls
Materials of the grinding tools
agate, sintered corundum, silicon nitride, zirconium oxide, hardened stainless steel, hardmetal tungsten carbide
Grinding bowl sizes
80, 250, 500 ml
Grinding ball diameter
0.1 – 40 mm
Max. feed size (depends on material)
10 mm
Min. sample quantity
10 ml
Max. sample quantity
900 ml
Final fineness (depends on material)
< 1 µm
Typical grinding time down to analytical fineness

4 min

Grinding process

dry/wet

Grinding in inert gas
yes
Gas pressure and temperature measurement
yes
Rotational speed of main disk
50 – 400 rpm
Transmission ratio planetary disk / grinding bowl
relative = 1 : -2.19
Effective diameter of main disk
~ 250 mm
Centrifugal acceleration (g = 9.81 m/s²)
22 g
Interfaces

USB

Electrical details

200-240 V/1~, 50-60 Hz, 1730 Watt

Instrument also available in the following voltage

100-120 V/1~, 50-60 Hz, 1470 watt – order no. 05.5010.00

Emission sound pressure level at the workplace according to DIN EN ISO 3746 (depending on the material to be ground, grinding bowls/balls, selected rotational speed)

up to approx. LpAd = 83 dB
Weight

120 kg

Dimensions (W x D x H)

Bench top instrument 58 x 67 x 57 cm

Booking Demo