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Flat twin screw

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Flat twin screw

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Parameters
Product specifications:
 
The long diameter ratio of s65 to 180: L/D s 18 to 25
 
The screw compression ratio is designed according to different raw materials and different products.
 
 
Technical indicators:
 
Materials selected for high-quality 38 chrome aluminum (38 CrMOALA)
 
Surface hardness: HV: .290
 
Nitride hardness: HV950 to 1000
 
Nitrogen depth: 0.45 to 0.7mm
 
Nitrogen brittleness: level 1
 
Surface roughness: Ra0.4
 
Screw straightness: 0.015mm
 
Chromium-plated hardness of the surface after nitride: .900HV
 
Chrome thickness: 0.05 to 0.10mm
 
Double alloy hardness: 60-70 HRC
 
 
Application s:
 
The hetero-parallel twin screw can be processed PVC pipe: applied to real estate pipes, urban water supply, drainage pipe system;
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Time of issue:2019-05-23 00:00:00