pulverisette 7

classic line

Planetary

Micro Mill 

 High speed grinding of

laboratory samples

down to < 1 μm

 Suitable for hard to soft

grinding materials

 Also suitable for grinding in

suspension

milling sample

preparation planetary ball mill

for your lab
Application

Planetary Micro Mill pulverisette 7 classic line

Field of application

For very fine comminution down to colloidal fineness of

dry laboratory sample or solids in suspension. For mixing

and perfect homogenisation of emulsions and pastes.

Feed size < 5 mm; feed quantity up to 2 x 20 ml; 

capable of fineness down to 1 μm

Examples of application

Geology and mineralogy

stones, pebbles, sand, minerals

Ceramics

porcelain, sintered ceramic, clay, fireclay

Chemistry

plant protectives, fertilisers, slats, inorganic and

organic materials

Biology

plants, leaves, freeze-dried samples

Medicine, pharmacology and galenite research

eye therapeutics, jellies, crèmes, extracts, drugs,

pastes, dragées, tablets

Nuclear research

radioactive samples

Material technology

pigments, precious materials, new materials, alloys,

mechanical activation

Analytic preparation 

spectroscopy, X-ray fluorescence, X-ray structure 

analysis, chromatography

Planetary Micro Mill

quality fine grinding control
Operation

Planetary Micro Mill pulverisette 7 classic line

Method of operation

In the planetary micro mill pulverisette 7, grinding bowls

rotate on their own axis while simultaneously rotating

through an arc around the central axis. The grinding

bowls and material are thus subjected to centrifugal 

forces which constantly change in direction and intensity

resulting in efficient, fast grinding processes.

The geometries and speed ratios allow optimum movement of the grinding balls. The grinding balls rotate

against the inside wall of the bowl until under specific

conditions they break away from this. After being thrown

across the grinding bowl, the grinding material and the

balls are impacted against the opposite wall. The energy

thus created by impact is many times higher than for 

traditional ball mills. This results in excellent grinding

performance and considerably shorter grinding times.

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fritsch.de

milling pulverisette 7

working principle

pulverisette 7 

membrane keyboard
Features

Planetary Micro Mill pulverisette 7 classic line

grinding

analytical wet /dry fineness

Advantages

 Very high grinding output with low space requirement

 High final fineness down to < 1μm

 Very fast, uniform comminution

 Loss-free grinding – also for suspensions

 Reproducible grinding results

 Quick and safe bowl retention

 Easy to clean

 Cooling of the grinding chamber by an integrated fan

to allow extended for grinding times

 Analytically pure grinding materials; choice of 

8 different materials

 Simple cleaning of the grinding components

 Exact display of rotational speed

 Microprocessor electronic controls

 Wide speed range

 Easy to use, ergonomic design

 Safety tested and CE mark

 2 year guarantee

Design Characteristics

 Speeds up to 800 rpm

 Enclosed, easy-to-open working chamber

 Microprocessor control system

 Speed control with setpoint/actual value

displayed

 Programme timer for grinding operation and 

cooling phases

 Grinding cycle can be programmed to repeat

up to 99 times

 Forward and reverse operation

 Power safe function

 RS232 interface for output of process data and

programming of grinding cycles (validation)

 Ergonomic membrane keyboard (IP64)

 Maintenance-free drive (asynchronous motor

and frequency converter)

 Built in selection of mains voltage available 

(100-120/200-240 V)

 Grinding bowl with sealing ring

 Simultaneous grinding of two samples

 Recyclable plastic housing
Accessories

Planetary Micro Mill pulverisette 7 classic line

The quoted number of balls per bowl is the minimum

quantity; depending on the material behaviour it shall be

possibly increased. 

Normally grinding bowls and balls of the same material

are used. To shorten the grinding time, larger or heavier

balls (higher density) can be used (high grinding energy):

e.g. tungsten carbide balls in the steel grinding bowl or

zirconium oxide balls in the silicon nitride bowl.

Grinding bowls should always be used in pairs 

(if applicable, empty bowl without balls).

Smaller grinding balls (0.5 - 4 mm dia.) to achieve a

fineness down to the Nanometer-range are available on

request!

Recommended number of balls per grinding bowl

Accessories

Grinding bowls and balls

Grinding bowls and balls are available in 8 different

materials to avoid contamination of samples due to

unwanted abrasion of grinding elements.

Grinding bowl/ 12 ml 45 ml

useful capacity 0.5-5 ml 3-20 ml

Balls

5 mm 50 180

10 mm 6 18

15 mm 7

Material Density Abrasion Material to 

g/cm3 resistance be ground

Agate 2.65 good soft to medium99.9 % SiO2 hard samples

Silicon nitride 3.1 extremely abrasive sam91 % Si3N4 good ples, iron-free

grinding

Sintered corundum > 3.8 fairly good medium-hard, 

99.7 % Al2O3 fibrous samples

Zirconium oxide 5.7 very good fibrous, abrasive

94.2 % ZrO2 samples

Stainless steel 7.8 fairly good medium-hard,

bowls: 17-19 % Cr + brittle samples

8-10 % Ni

balls: 12.5-14.5 % Cr +

1 % Ni

Tempered steel 7.9 good medium-hard,

bowls: 11-12 % Cr brittle samples

balls: 1-1.65 % Cr

Hard metal tungsten 14.95 very good hard, abrasive

carbide samples

93.8 % WC +

6 % Co

Polypropylene bowls 0.9 adequate soft, brittle 

samples

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grinding bowls and balls
Data Planetary Micro Mill pulverisette 7 classic line

p7e-06-03-5/P Right to modify technical specifications reserved

working principle impact force

max. feed size 5 mm

(depending on the material)

min. sample quantity 0.5 ml

max. sample quantity 40 ml

final fineness < 1 μm

typical grinding time 8 min

(e. g. for quartz sand up to < 40 μm)

grinding process dry / wet

speed of the main disc 100 - 800 rpm

transmission ratio irelative = 1 : -2

electrical details 100-120/200-240 V/1~, 50-60 Hz, 880 watt

motor-shaft-power according to

VDE 0530, EN 60034 0.37 kW

weight net: 35 kg, gross: 55 kg

dimensions w x d x h table top instrument: 37 x 53 x 50 cm

packing details wooden case: 68 x 54 x 72 cm

Technical data

Ordering data

Order no. Description

Planetary Micro Mill pulverisette 7

without grinding bowls and balls

07.4000.00 for 100-120/200-240 V/1~, 50-60 Hz, 880 watt

The voltage specified on the order form will be set by the factory.

Grinding bowls

Grinding bowls 45 ml volume with lid and seal ring

50.7050.00 agate

50.7060.00 sintered corundum (99.7 % Al2O3)

50.7310.00 silicon nitride

50.7110.00 zirconium oxide

50.7100.00 stainless steel

50.7090.00 tempered steel

50.7080.00 hardmetal tungsten carbide

50.7200.00 polypropylene (disposable bowl)

07.3280.13 bowl adapter for disposable bowl

50.7250.20 replacement seal ring PTFE 50/40 mm dia. for all bowls of 45 ml volume

Grinding bowls 12 ml volume with lid and seal ring

50.5050.00 agate

50.5060.00 sintered corundum (99.7 % Al2O3)

50.5310.00 silicon nitride

50.5110.00 zirconium oxide

50.5100.00 stainless steel

50.5090.00 tempered steel

50.5080.00 hardmetal tungsten carbide

50.5250.20 replacement seal ring PTFE 37/26 mm dia. for all bowls of 12 ml volume

Grinding balls

Grinding balls 15 mm dia. for grinding bowls 45 ml

55.0150.05 agate, polished

55.0150.06 sintered corundum (99.7 % Al2O3)

55.0150.31 silicon nitride

55.0150.27 zirconium oxide

55.0150.10 stainless steel

55.0150.09 tempered steel

55.0150.08 hardmetal tungsten carbide

Grinding balls 10 mm dia. for grinding bowls 45 ml, 12 ml

55.0100.05 agate, polished

55.0100.06 sintered corundum (99.7 % Al2O3)

55.0100.31 silicon nitride

55.0100.27 zirconium oxide

55.0100.10 stainless steel

55.0100.09 tempered steel

55.0100.08 hardmetal tungsten carbide

Grinding balls 5 mm dia. for grinding bowls 45 ml, 12 ml

55.0050.05 agate, polished (100 pieces weigh approx. 17 g)*

55.0050.27 zirconium oxide (100 pieces weigh approx. 38 g)*

55.0050.10 stainless steel (100 pieces weigh approx. 51 g)*

55.0050.09 tempered steel (100 pieces weigh approx. 52 g)*

55.0050.08 hardmetal tungsten carbide (100 pieces weigh approx. 97 g)*

* due to the indication of weight, the high number of balls per grinding bowl can be weight.

Fritsch GmbH

Manufacturers of Laboratory Instruments

Industriestrasse 8 · 55743 Idar - Oberstein · Germany

Phone: +49 67 84 70 0 · Fax: +49 67 84 70 11

E-Mail: info@fritsch.de · Internet: www.fritsch.de