Specification: Parallel twin screw diameter: Φ 18-Φ 177mm The building block screw consists of core spindle and several hollow screw segments which can be replaced easily for different materials. The mixing components adopts building block type, which can be mounted and replaced conveniently. Such design makes it possible to process several kinds of materials with one screw. Technical Parameter: Hardness After Hardening & Tempering:HB280-320 Nitrided hardness: 950-1100HV Nitrided layer depth:0.50-0.80mm Nitrided brittleness: Less than 2 level Surface roughness: Ra 0.4μm Linearity of screw: 0.015mm/m Bimetallic layer depth: ≥3mm Bimetallic hardness: HRC60-72 Hard-chrome plating hardness after nitriding: ≥950HV Chrome-plating layer depth: 0.025~0.10mm |