GRS 180 / GRS 300

Sprues of all kinds and small faulty parts are ground economically and quietly – adapted to your granulation need. The large cutting chamber opening in combination with the angled rotor makes the size reduction of bulky sprues possible.

The GRS granulators can be equipped and adapted individually. Both models are available with low or high built frame. It is also possible to realize various rotor types or drive capacities.

Tell us your application needs.


Quiet granulation

  • divided solid cast cutting chamber reduces vibrations and thus noise
  • hopper made of noise reducing composite material

High productivity

  • opening of cutting chamber without tools
  • easy screen removal
  • excellent access for fast and economical cleaning

Excellent regrind quality

  • self-cleaning steel plate
  • low fines
  • low rpm
  • Highly consistent particle size
  • easy to clean

High reliability

  • safety engineering according to performance level C
  • starts even then hopper is full loaded
  • W+T package prepares for highly filled engineered materials

Technical specifications

ModelGRS 180GRS 300
Rotor cutting diameter [mm]180300
Cutting chamber opening [mm]285 x 200450 x 335
No. of rotary blades710
No. of stationary blades12
Motor power [kW]2,25,5
Throughput [kg/hr]*approx. 35approx. 80
* depending on screen size and material


GRS 180 [mm]1.220665710
GRS 300 [mm]1.600900930
GRS 180 [mm]1.660665710
GRS 300 [mm]1.960900930


Various rotor versions, drives and blade qualities of the GRS series are individually designed for your application, grinding reliably, energy-saving and producing an optimum grinding material quality.

Suitable wear protection packages secure your investment, reduce your maintenance costs and increase your profit when grinding abrasive materials.

Water-cooled cutting chambers reduce the thermal stress on your materials, protect against plastification in the cutting chamber and enable optimum grinding even in critical applications.

The filling level of the material container is monitored to prevent overfilling of the container and material back-up into the grinding chamber. A warning signal can be issued or, for example, a vacuum conveyor can be controlled. The production process remains stable.

Whether with low or high frame, material container or free outlet, hopper for feeding by means of sprue picker or manually – the GRS series adapts to your production. An auger feeder to the position below the injection moulding machine or a flap hopper for production sensitive to cleanliness are available.

GRS 180 high built

GRS 180 in high built version, hopper and cutting chamber is open, material discharge for free fall downwards for filling a bag

GRS 180 for clean production

GRS 180 equipped with a slid-/flap gate in the hopper for cleanness in the production, inspite of low inlet height no pollution by fly back

GRS 180 under separation drum

GRS 180 in low built version designed for the height of a separation drum, slide gate hopper for reach-in safety and no pollution by fly back

GRS 180 with auger feed

GRS 180 with auger feed for integration in the injection molding machine

GRS 180 integrated in injection molding machine

A sprue picker feeds the GRS 180. When the safety door is closed, the granulator is ready for operation. If the safety door is openend, the granulator stops.

GRS 300 in high built version

GRS 300 in high built version for batch grindg applications. Hopper and cutting chamber are opened, material discharge for free fall downwards for filling a bag