Fritsch Milling and Sizing

Pulverisette 7

Planetary Micro Mill Premium Line

Working principle impact force
Optimal for material type hard, medium-hard, brittle
Number of grinding stations 2
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 20, 45, 80 ml
Grinding ball diameter 0.1 – 20 mm
Max. feed size (depends on material) 5 mm
Sample quantity 1-60 ml
Final fineness (depending on material) < 0.1 µm
Typical grinding time down to analytical fineness 3 min
Grinding process dry/wet
Grinding in inert gas yes
Gas pressure and temperature measurement yes
Max. rotational speed grinding bowls 2200 rpm
Rotational speed of main disk 150-1100 rpm
Transmission ratio planetary disk / grinding bowl i relative = 1 : -2
Effective diameter of main disk 140 mm
Centrifugal acceleration (g = 9.81 m/s²) 95 g
Interfaces USB
Electrical details 100-120 V / 200-240 V/1~, 50-60 Hz, 1200 Watt voltage, indicated by customer is set
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) LpAd = 80 dB
Weight 44 kg
Dimensions (W x D x H) bench top instrument 40 x 58 x 36 cm
Recommended Number of Grinding Balls Per Bowl
Grinding balls ≥ 5 mm Recommended number of balls per bowl
Grinding bowl/ Useful capacity (grinding material) 20 ml
1 – 9 ml
45 ml
3 – 20 ml
80 ml
10 – 30 ml
Balls diameter
20 mm 5
15 mm 7 10
10 mm 10 18 25
5 mm 80 180 250
Grinding balls ≤ 3 mm Recommended ball mass per bowl in grams
Grinding bowl / Useful capacity (grinding material) 20 ml
1 – 9 ml
45 ml
3 – 20 ml
80 ml
10 – 30 ml
Material
Zirconium oxide 30 g 70 g 100 g
Hardened, stainless steel 40 g 90 g 150 g
Hardmetal tungsten carbide 80 g 200 g 300 g
Elemental Analysis
General specifications
Material Agate – SiO₂
Chemical composition
Element Share %
Silicon oxide – SiO₂ 99.9
Aluminium – Al₂O₃ < 0.02
Iron oxide – Fe₂O₃ < 0.02
Calcium oxide – CaO < 0.02
Magnesium oxide – MgO < 0.02
Sodium oxide – Na₂O < 0.02
Potassium oxide – K₂O < 0.02
Maganese oxide – MnO < 0.02
Physical and mechanical properties
Density 2.65 g/cm³
Harness 6.5 – 7 Mohs
Elemental Analysis
General specifications
Material hardened stainless steel – 1.4125
ISO/EN/DIN code X105CrMo17
Chemical composition
Element Share %
Iron – Fe 81.4
Chronium – Cr 17
Carbon – C 1.1
Molybdenum – Mo 0.5
Physical and mechanical properties
Density 7.7 kg/dm³
Hardness ~ 60 HRC
Elemental Analysis
General Specifications
Material Sintered corundum 1 – Al₂O₃
ISO/EN/DIN code
Chemical composition
Element Share %
Aluminium oxide – Al₂O₃ 99.651
Silicon oxide – SiO₂ 0.257
Calcium oxide CaO 0.081
Other 0.011
Physical and mechanical Properties
Density 3.8 g/cm³
Hardness 18.00N/mm² (Vickers HV 0.5)
Elemental Analysis
General specifications
Material Zirconium oxide – ZrO₂
Chemical composition
Element Share %
Zirconium oxide – ZrO₂ 94.2 – 95.2
Hafnium oxide – HfO₂ 1 – 2
Magenesium oxide – MgO 3.5
Silicon dioxide – SiO2 0.1
Aluminum oxide – Al₂O₃ 0.1
Other 0.1
Physical and mechanical Properties
Density 5.7 g/cm³
Hardness Vickers 1200 (HV10)
Elemental Analysis
General specifications
Material Tungsten carbide – WC
ISO/EN/DIN code
Chemical composition
Element Share %
Tungsten carbide – TC 88
Cobalt – Co 12
Physical and mechanical properties
Density 14.3 g/cm³
Hardness 89.7 HRA
Elemental Analysis
General specifications
Material Silicon nitride – Si₃N₄
ISO/EN/DIN code SNCB5
Chemical composition
Element Share %
Al₂O₃Y₂O₃ 12.5
Si₃N₄ 86.5
Other 1
Physical and mechanical properties
Density 3.25 g/cm³
Hardness 91.1 HRA

USA Headquarters
FRITSCH Milling and Sizing, Inc.

57 Grant Drive, Suite G
Pittsboro, NC, 27312

Phone: + 1 919 229 0599
Email: info@fritsch-us.com

INSTRUMENT SUPPORT SERVICE

Our technical service team is at your disposal for maintenance, repair, calibration of laboratory instruments and ordering original spare parts.
We are also available worldwide for warranty extensions and all other questions.

Would you like to send your instrument for testing or maintenance to us? Please visit the Service Form page and complete the form for your submission.

US Service Technician Reggie Piard 919-229-0599 x111