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Single screw & barrel for plastic extruder machine Screw Diameter : :55mm~150mm Ratio of length to diameter: =25~33 Application : pipe film tape Plastic processed : PE LHDPE HDPE PP Technical Parameter Nitride Case Depth 0.5mm-0.8mm Nitride Hardness 1000-1100HV Nitride Brittleness ≤Grade One Surface Roughness Ra0.4um Screw Straightness 0.015mm Alloy Hardness HRC68-72 Alloy Depth 0.5mm-0.8mm Chromium Coating Thickness 0.025~0.10mm Material & Technologies SKD61(H13)...