
120 mm Bimetallic Screw and Barrel for Pear Cotton Screw. Bimetallic Construction: Features Stellite, Colmonoy 6, or Tungsten carbide alloy with HRC58-68 hardness. Advanced Nitriding Treatment: Nitriding layer depth 0.5-0.8mm with hardness 900-1050Hv and brittleness under Grade 2. High Precision Straightness: Screw straightness maintained at 0.015mm/M for optimal extrusion performance. Diverse Alloy Options: Available in 38CrMoAlA, 42CrMo, 9Cr18Mov, and CW6Mo5Cr4V2 materials. Custom Logo Printing: Supports logo printing on products via sticker and on cartons with provided artwork. One Year Warranty: Comprehensive one-year warranty coverage for mechanical equipment defects. Fast After-Sales Service: Dedicated fast service team available for technical support and spare parts. Wide Application Range: Suitable for plastic extrusion, chemical fiber, recycling, and cable extrusion processes.