Rubber screw barrel
Pin Screw and Barrel Specification: Ø75mm~Ø200mm
Cold/Heat Feed Screw Specification: Ø65mm~Ø650mm
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitrided hardness: HV 850-1000
Nitrided layer depth:0.50-0.80mm
Nitrided brittleness: ≤ Grade Ⅱ
Surface roughness: Ra 0.4μm
Linearity of screw: 0.015mm
Bimetallic layer depth: ≥2mm
Bimetallic hardness: HRC60-72
Hard-chrome plating hardness after nitriding: ≥900HV
Chrome-plating layer depth: 0.025-0.10mm
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