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Refurbishment of screws

we offer in following variants:

  • armoured screws STANDARD
  • armoured screws STELIT
  • armoured screws EXTRA
  • armoured screws EXTREM

Materials EXTRA and EXTREM were specially designed for welding on extrusion and injection screws.

  • armouring of the upper part of the screw flight by using STANDARD weld overlay
Diameter in mmLenght (max.) in mmWeld thickness in mmHardness
20 ¸ 750  60001,5 ¸ 2,5900 ¸ 1000 HV
  •  armouring of the upper part of the screw flight by using STELIT weld overlay – suitable for extrusion of clean materials
Diameter in mmLenght (max.) in mmWeld thickness in mmHardness
20 ¸ 750 60001,5 ¸ 2,540 ¸ 50 HRC
  • armouring of the upper part of the screw flight by using EXTRA weld overlay
Diameter in mmLenght (max.) in mmWeld thickness in mmHardness
20 ¸ 750  60001,5 ¸ 2,550 ¸ 55 HRC
  • armouring of the upper part of the screw flight by using EXTREM weld overlay, armoured layer contains tungsten carbide grains  of high hardness up to 2400 HV
    (30 % - 40 % in a welded on layer)
Diameter in mmLenght (max.) in mmWeld thickness in mmHardness
40 ¸ 750  60001,5 ¸ 2,550 ¸ 62 HRC

    Methods of welding on of the armoured layers when renovating the screws:

armouring of the upper part of the screw thread 

armouring of the upper part and compressive edge of the screw thread 

armouring the entire surfaceof the screw 

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