Showing all 6 results

Showing all 6 results

Operating principle of a jaw crusher

Jaw crushers are theideal choice for fast primary crushing of hard, medium-hard and brittle materials.

The material to be crushed is fed through a hopper into a shaft formed by two crushing jaws. One crushing jaw is fixed, the other is driven by an eccentric shaft and thus moves towards the fixed crushing jaw at regular intervals.

Thematerial is crushed by this elliptical movement between the two jaws. If it is finer than the set minimum distance, it falls through between the two jaws and can be collected in a container.

Jaw crushers in the laboratory Applications

Jaw crushers are used in a wide range of industries. They can be used in the mining industry for crushing rock, but also in the construction industry for pre-crushing aggregates.

In addition to industrial use, jaw crushers can also be found in laboratories and in pilot plant facilities. Jaw crushers in the laboratory, for example, can be used in a more robust environment to prepare coarse materials for further production steps.

Another possible application is the quality control of raw materials. The materials to be crushed range from …

  • Building materials,
  • minerals,
  • metals,
  • ceramics and
  • Glsern

to medical materials such as bones. In addition, these all-rounders provide valuable services in material development or environmental analysis, for example for primary crushing of soil and rock samples.

Selecting a jaw crusher for the laboratory – what are the criteria?

Due to the wide range of applications, laboratory jaw crushers come in different sizes. There are variants as stand-alone crushers or as table-top crushers. In addition to this distinction, the crushers can be used as batch gates or integrated directly into production processes as online gates.

Material type

Depending on the hardness of the substances to be cr ushed, a different type of material is suitable for the crushing jaws. Possible materials are, for example, stainless steel, manganese steel, zirconium dioxide or also tungsten carbide, which is characterised by a particularly high hardness.

With some tools, special heavy metal-free crushing jaws can also be selected for relevant applications. The materials to be processed range from hard ceramics to brittle bones.

Final fineness

Another distinguishing feature is the final fineness to be achieved. For this purpose, the gap width between the crushing jaws can be specifically adjusted. Furthermore, a distinction can be made as to whether the gap width can be adjusted steplessly or at predefined intervals.

Max. Feed size

The size of the material to be crushed also has a major influence on the selection of the appropriate crop. In most cases, floor-mounted grinders are suitable for larger grain sizes, typically materials up to 15 cm in diameter can be used as feed material. Table tools are the specialists for finer material, where the starting grain sizes are usually in the range of a few centimetres.

Our expert staff at will be happy to help you with any questions and assist you with your selection. Contact us today!

Laboratory jaw crushers at

The features of the tools can differ significantly depending on the area of application. To make it easier for you to choose, the most important features of the following brand-name crushers are listed below.

Retsch BB 50

The BB 50 from Retsch is a space-saving table-top instrument that fits into any laboratory. It is particularly suitable for hard, brittle, medium-hard and tough materials. Its focus is on small sample quantities, larger grain sizes and small final finenesses. Materials that can be processed include rocks such as basalt, granite, feldspar or quartz, but also minerals, glasses, ceramics or bones.

  • Feed size: < 40 mm
  • Final fineness: < 0.5 mm
  • Grinding gap adjustment: 0-11 mm, in steps of 0.1 mm
  • Collecting capacity: 3 l

Retsch BB 100

With the BB 100, medium-hard, hard and brittle materials can be crushed quickly and gently. It is ideal for sample preparation in the laboratory and pilot plant.

  • Feed particle size: < 50 mm
  • Final fineness: < 4 mm
  • Grinding gap adjustment: 0-20 mm, infinitely variable
  • Collecting capacity: 2 l

Retsch BB 200

The BB 200 jaw crusher has numerous performance features that make it the ideal tool for laboratories and pilot plants. It can be operated in batch mode for smaller sample quantities as well as continuously for larger quantities. The infinitely variable gap width adjustment and the zero point adjustment allow particularly reproducible results.

  • Feed particle size: < 90 mm
  • Final fineness: < 2 mm
  • Grinding gap adjustment: 0-30 mm, infinitely variable
  • Collecting capacity: 5 l

Retsch BB 300

The BB 300 is one of the larger instruments from the brand manufacturer Retsch. Its main focus is on coarse and preliminary size reduction of brittle and hard as well as medium-hard to hard materials. It is suitable for particularly large grain sizes and large sample quantities. Depending on the sample quantity, both batch and continuous operation are possible.

  • Feed particle size: < 130 mm
  • Final fineness: < 5 mm
  • Grinding gap adjustment: 1-40 mm, infinitely variable
  • Collecting capacity: 27.5 / 35.4 l

Fresh Pulverisette 1, Model I

The model I of the Fritsch Pulverisette 1 is a compact jaw crusher for the laboratory and the ideal device for fast and effective pre-crushing and coarse crushing. The table-top crusher can be operated in sets or continuously. It is particularly suitable for hard and very hard, brittle materials. In continuous operation, its throughput is up to 140 kg/h.

  • Feed particle size: < 60 mm
  • Final fineness: < 1 mm
  • Grinding gap adjustment: 1-15 m

Fritsch Pulverisette 1, Model II

The model II of the Pulverisette line from FRITSCH has its focus on the pre-shredding of hard and very brittle materials. It is particularly fast and uniform as well as extremely robust. It can be used continuously with a throughput of 200 kg/h.

  • Feed particle size: < 95 mm
  • Final fineness: < 1mm
  • Grinding gap adjustment: 1-15 mm

Buy Jaw Crushers for the Lab at

Are you interested in purchasing a laboratory jaw crusher? We will be happy to help you choose the right one for you. Contact us and our experts will be happy to answer your questions and provide you with competent and detailed advice. You can reach us at +49 30 209 657 900 or by email at [email protected].