Pressemitteilung BoxID: 145216 (Fritsch GmbH)
  • Fritsch GmbH
  • Industriestraße 8
  • 55743 Idar-Oberstein
  • Ansprechpartner
  • Andrea Köhler
  • +49 (6784) 70-146


Who in the sample preparation lab is not familiar with the vibrating cup mill?

(PresseBox) (Idar-Oberstein, ) The most obvious truth concerning the Vibrating Cup Mill is: it has stood the test of time and is still EFFECTIVE!

There is hardly any other mill faster at grinding hard and brittle materials down to analytical fineness which is so easy to clean!

By way of introduction:

Operating principle: The grinding set is located on a vibrating disk with a quick-release clamping system. The disk vibrates with a horizontal circular motion which results in the grinding set exerting both high impact and frictional forces on the sample being ground.

Fields of application: Fast dry and wet grinding of hard, brittle as well as fibrous materials down to analytical fineness without weight loss is achievable. The recommended feed size of 12 mm is significantly exceeded by many users. Even a feed-size of 20 mm is not uncommon. Final fineness of the x50 value down to 5 µm can be achieved.

Accessories: We recommend hardened steel grinding sets for most applications, whilst grinding sets of hardmetal tungsten carbide should be used for extremely hard samples or to avoid contamination of the sample with iron, while soil samples should be ground using agate.

Product highlights:
Top Rank Performance
- Motor output is not the complete answer - but even more important is the transfer of energy to the sample material being ground. Because of this, we have developed a motor with a frequency converter control. We are the only company in the world using this technology which automatically adjusts the resonant frequency between the motor speed and the load of the vibrating disk to the most effective level.
- Also, fixed speeds up to 1150 rpm can be selected.
- Cooling fins and fans control the temperature of the grinding set.
- All grinding parameters can be accurately reproduced through corresponding configurations.

Top Rank Operation
- The grinding set is placed on a carriage directly in front of the operator’s body before being moved into the final operational position. The operational height is modified to suit the operator’s height for which his back should be eternally grateful!
- The weights of the large grinding sets were reduced.
- Insulated, user-friendly handles on the grinding sets.
- Only a few large parts require cleaning.

Top Rank Safety
- Completely new clamping of the grinding set using a symmetrical eccentric cam.
- Final positioning for the grinding set, including an anti-turn locking device for extra safety.
- Automatic monitoring of the grinding set clamping.
- Automatic speed selection for agate grinding sets to eliminate accidental breakage.

Moving beyond theory – experiences in practical use
- Soil samples: Using the agate grinding set, analytical fineness is achieved after 30–60 seconds.
- Rock samples: Geologists and mineralogists prefer to use Vibrating Cup Mills with grinding sets of agate or hardmetal tungsten carbide to prepare samples for spectroscopic analysis.
- Activated charcoal: Activated charcoal can generally be ground very well in ball mills. However, some types exhibit odd behaviour: A very fine powder is created which appears to behave like a highly viscous liquid. The balls are slowed down by this effect and some coarse particles escape the comminution. In this case, Vibrating Cup Mills are recommended.
- RoHS and WEEE were hot topics recently.
- Objective: A single electronic component of approx. 5 mm length with two long contacts of approx. 20 mm. Planetary ball mills, vibratory mills and cutting mills did not succeed or were too large. The Vibrating Cup Mill with 50 ml hardmetal tungsten carbide grinding set guarantees fast and loss-free comminution.
- Climate discussion is currently the number one topic. Grinding worn out solar cells so that they can be compressed into a tablet with an absolutely compressed and smooth surface is a difficult task. Planetary ball mills exhibit the phenomenon described above for activated charcoal. Only a Vibrating Cup Mill using a hardmetal tungsten carbide grinding set offers a solution here. After 5 minutes grinding, the sample was measured using the FRITSCH ANALYSETTE 22 Laser Particle Sizer which showed that the silicon was in fact in dust form with 50% < 3.7 µm and 90% < 13.6 µm.

In summary:
Anyone who must quickly reduce hard, brittle and even fibrous materials to analytical fineness combined with ease of cleaning should look no further than the FRITSCH Vibrating Cup Mill.

Fritsch GmbH

FRITSCH: Your specialist in the processing laboratory

FRITSCH is the world-wide leading manufacturer of instruments for sample preparation and particle size analysis in the laboratory. Since 87 years now, the company is concentrating on the three product groups and identified with the brand names of PULVERISETTE, ANALYSETTE and LABORETTE in research and industrial laboratories. The FRITSCH name is synonymous with technical competence and economical efficiency in all matters in the field of

milling - particle sizing - dividing

Because FRITSCH operates throughout the world, they have the unique advantage of vast experience in a wide variety of scientific disciplines which enables them to offer constructive solutions to ease problem solving. FRITSCH laboratory instruments ensure proven, extreme longevity, highest quality and innovative technology in combination with simple operation.

Here a short view of the FRITSCH instrument range:

Mills for analytical sample preparation
FRITSCH offers an entire range of instruments for crushing, grinding, fine-milling, mixing and homogenising of hard-brittle, fibrous, elastic to soft materials dry or in suspension. The FRITSCH variety of grinding mills includes different ball mills, planetary ball mills, cutting mills, rotor mills, jaw crushers enables an optimal adjustment of the grinding process to the sample material and the following analyse.
Show us the sample, which you can’t manage to grind and we’ll show you the instrument which can do it!

Sieve Shakers and Laser Particle Sizers for particle size determination
FRITSCH with their vast experience in the particle sizing field offers Sieve Shakers as well as Laser Particle Sizers in different version.
FRITSCH offers due to its equipment varieties for each special use and application a particle size measuring instrument, which uses the most modern laser technology or the well-tried and reliable sieving method and this with an unbeatable price-to-performance ratio.

Laboratory instruments for analytical sample handling
The FRITSCH instrument range also includes sample divider and feeder, because representative sample dividing of dry samples or suspension as well as controlled and uniform sample feeding for mills and other instruments are basic conditions for reliable and precise analysis.

In addition to the complete programme of laboratory instruments, FRITSCH also offers a comprehensive range of services with Workshops, product presentations with the FRITSCH-Mobile laboratory bus on your door step, test milling or particle size analysis of your sample at no charge and much more.

Please use our instrument search engine and our grinding report data base on the FRITSCH-Homepage under – sample preparation – solutions. Here you will find your suitable instrument as well as a comparative grinding report comparable with your application.

Make use of our decades of experience. We can facilitate your work substantially.