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Bernex Bimetall AG
Industriestrasse 211
CH-4600 Olten

Tel. +41 (0) 62 287 87 87
Fax +41 (0) 62 287 87 90
sales@ch.bernexgroup.com
 
 

The quality of Bernex screws

We can now offer you a wide range of products.
Schnecken

We are able to weld all current screw hard-facing alloys. In addition to the standard alloys such as BN 56 we offer you our special developed proprietary hard-facings:

  • BC or BN [standard alloys]
  • BN 56 (N,B,Si)
  • BF 60 (Cr,V)
  • BNW 830 (Wolfram carbide)

For some applications the screw needs to be better protected. Bernex offers you:

PVD Coatings: Physical Vapour Deposition Coatings based TiN, CrN and Multi-layer processes
Appropriate heat treatment

» Screw coatings (pdf, 59kb)

Depending on the cylinder and screw material properties certain combination of the two are not suitable, such as a nitrated cylinder and a tungstan carbide screw hardfacing.

The enclosed PDF file is a very good overview on commen materials and the combinations possiblities with Bernex products.

Bernex screws

  • Single screws (injection moulding, extrusion and other applications)
  • Twin screws (co- and counter-rotating)
  • Multi-section screws
  • Mixing and shear sections

Screw dimensions

  • Screws made of nitrided, heat treated or stainless steel:
    Diameter: 18 - 600 mm
    Length: max. 9'000 mm
     
  • Tool steel screws (fully hardened):
    Diameter: 18 - 80 mm
    Length: max. 2'000 mm

Suggestions

to wear systems, based on plastics

Depending on the processed plastics there are various wear systems possible.

Bernex Bimetall AG
Industriestrasse 211 | CH-4600 Olten

Tel. +41 (0) 62 287 87 87 | Fax +41 (0) 62 287 87 90 | sales@ch.bernexgroup.com
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