Descripción del producto

Ø**-Ø**0 Length/Diameter Ratio:*5～*5 Screw can be selected from ordinary, gradual, mutational, pinned, shielding, separating and exhausting types. The compression ratio of the screw can be designed according to different products and mixtures. TECHNICAL SPECIFICATIONS: Material : Quality *8CrMoAlA Hardness After Hardening & Tempering : HB******0 Nitrided Hardness : HV*******0 Nitrided Case Depth: 0.*5~0.7mm Nitrided Brittleness: Less Than Grade 2 Surface Roughness: Ra 0.4 Screw Straightness: 0.**5mm Surface Chromium-Plating's Hardness After Nitriding:≥**0HB Chromium-Plating Depth: 0.*5~0.*0mm Alloy Hardness: HRC****5 Alloy Depth: 0.8~2.0mm