conical twin-screws

This series of screw is suit for pinch plate, shape material, pipe material and gran-ule-making, atc. The compression ratio of the screw can be designed according to different products an-d mixtures.

TECHNICAL SPECIFICATIONS: Material : Quality 38Cr Mo AlA Hardness After Hardening & Tempering : HB240-280 Nitrided Hardness : HV850-1000 Nitrided Case Depth: 0.45~0.7mm Nitrided Brittleness: Less Than Grade 2 Surface Roughness: Ra 0.4 Screw Straightness: 0.015mm Surface Chromium-Plating's Hardness After Nitriding:≥900HB Chromium-Plating Depth: 0.05~0.10mm Alloy Hardness: HRC50-65 Alloy Depth: 0.8~2.0mm