KNOLL Maschinenbau GmbH Schwarzachstraße 20
D-88348 Bad Saulgau

Tel.+49 (0) 7581/2008-90388
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Chip reducer ZHV

Areas of application 

The chip reducer ZHV is a component of the machine-integrated pump-back station RIK. It is installed if longer chips or chip balls are produced during machining operations and a screw if sufficient for removing the chips. After pumping back, the chips are of the quality necessary for further processing in centrifuges or presses.



    • Suitable for different chip types (e.g. steel, cast iron, aluminium, plastic).
    • Suitable for installation in machine-integrated pump-back stations.
    • Drawing-in process not influenced by the chip shape.
    • Simple, rugged and service-friendly design.
    • Minimal energy consumption.


  1. A feed screw (1) feeds the chips horizontally into the chip reducer.
  2. The vertical rotating cutter shaft (2) collects the chips and drags them over the fixed blade (3) into the cutting mechanism.
  3. The chips are reduced between the rotating (2) and fixed (3) cutter blades.
  4. The perforated plate (4) has user-specific hole diameters. In combination with the separator disc (5), only chips with the desired maximum length can pass through into the pump-back station. Longer chips return to the reducer station.
Chip reducer ZHV