Technology in top form

Maximum accuracy in technical production is the basis on which we ensure that the rolls and specialist components operate absolutely perfectly. For this reason, COSWIG invests continuously in the qualification of its employees and in modernising its machine park.

With CNC machining centres, Herkules lathes and laser measuring systems we have set the benchmark in terms of the accuracy and machining quality of our cast products. As a result, we can offer our customers a guarantee that the predicted performance potential will indeed be achieved in reality. Production takes place on two independent production lines with an annual capacity of 40,000 tonnes. This makes COSWIG particularly flexible and well enough equipped to meet any challenge.


Permanent mould and hand moulding shop

Foundry I

  • Approx. 600 permanent moulds, with sizes up to a diameter of 2,300 mm
  • 1x Si-Cr moulding sand mixer with a capacity of up to 32 t/h


Foundry II

  • Approx. 800 flasks with maximum dimensions of 5,000 mm x 5,000 mm x 2,500 mm
  • 2x Si-Cr moulding sand mixers with a capacity of up to 30 t/h in the core-making shop
  • Moulding sand mixing system; 2 systems with a maximum output of 15 t/h each
  • Core dimensions, Standing: 3,000 mm x 3,000 mm x 5,000 mm, Lying down:
    5,000 x 5,000 x 2,500 mm


Smelting operation

Foundry I

  • 4x MF induction furnaces 4 t, 2x 8 t and 23 t


Foundry II

  • 4x MF induction furnaces 2x 8 t and 2x 18.8 t


Annealing shop

Foundry I

  • 15 annealing chambers for
    • Normalising
    • Stress relieving
    • Quenching and tempering
  • Up to 150 t load with temperatures up to 1,200°C max.

Turning shop

  • 2x CNC rough turning machines
    Max. dia. 1,380 mm, max. length 9,500 mm
  • 6x CNC finishing machines
    Including 1x CNC machine for milling and drilling
    Max. dia. 2,400 mm, max. length 8,000 mm
  • 2x CNC roll neck milling machines
    Max. dia. 1,400 mm, max. length 8,000 mm
  • CNC external cylindrical grinding machine
    Max. dia. 1,600 mm, max. length 8,000 mm
  • 3x CNC vertical lathes
    Max. dia. 3,450 mm, max. length 2,500 mm
  • 3x CNC boring mills
    Max. 3,850 mm (vertical) x 6,000 mm (horizontal) x 1,600 mm
  • Belt saw
    Gantry design up to 40 t
    Max. dia. 1,800 mm, max. length 8,000 mm
  • Shrinkage space
    for shrinking rolling rings
    Max. dia. 1,650 mm, max. height 1,500 mm

Quality assurance

Technology and analytical methods in the test laboratory 

  • Optical emission spectrometer
  • Automatic carbon/sulphur measuring system
  • Universal tension/compression/bending machine for determining mechanical strength properties
  • Pendulum machine for determining notch impact energy
  • Laboratory annealing furnace for sample heat treatments
  • Sand laboratory for determining foundry sand parameters
  • Metallographic laboratory, mobile metallography and microhardness testing


Equipment and testing in the production departments  

  • Optical emission spectrometer
  • Ultrasonic testing and magnetic particle testing
  • Target value vs. actual value testing of all parameters
  • 3D measurement via laser tracker



  • Electronic data and image archiving
  • Retain samples

Perfect precision

The efficiency of any production line can be improved with rolls from COSWIG. Here, the key to success lies in the profile rolls and upset forging rolls, as well as in the rolling rings and plungers, which are carefully coordinated by our engineers to the production processes of our customers. For maximum roll performance, long service life and minimised costs.

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Engineering with guaranteed success

COSWIG is the specialist for high-end and innovative casting solutions. Whether wind energy companies, manufacturers of milling and grinding plants or machine builders: with well-grounded engineering solutions and expert industry knowledge, we can help you to shorten development processes, reduce costs and improve products.

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