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  • Screw For Rubber Machine - China

    price: contact company for price

    Product Specification and technical data
    inner Diameter:Ø45-Ø300
    L/D=8~20
    Hardness of quenching and tempering:HB240°~280°
    Hardness of nitration:HV850°~1000°
    Depth of Nitrated Layer:0.45~0.7mm
    Fragility of nitration:≤ Grade 2
    Surface roughness:Ra0.4
    straightness:0.015mm
    Hardness of Cr-coating Layer:HV≥900HV
    Nitrided layer thickness:0.05~0.10mm
    Thickness of Cr-coated Layer:0.8~2.0mm
    Hardness of bimetallic:HRC56°~65°(Ni-based alloy)

    Material :quality alloy steel
    ① 38CrMoALA(JIS SACM645)
    ② 42CMo(JIS SCM440)
    ③ 9Cr18MoV
    ④ CW6Mo5Cr4V2
    Heat-treatment:
    Nitriding treatment
    Electroplated hard-chrome finish
    High-frequency quenching
    Spray coating Bimetallic-alloy
    vacuum quenching

    1) high temperature, high temperature deformation;
    2) wear resistance, long life;
    3) resistant to corrosion, corrosive materials;
    4) high intensity, which can withstand high torque, high speed;
    5) has a good machinability;
    6) The residual stress after heat treatment, thermal deformation and so on.


    Company Contact:


    • Phone: +8657489075950

    • Address: NO.16 XINGHAI SOUTH RD, HI-TECH ZONE, Ningbo, Zhejiang, China

    • Email: Email


    Published date: August 11, 2016 -

    • Business Description: Ningbo Superior Machinery Co.,Ltd was founded in 1992,which is one of the earliest manufacturers of screw and barrel for plastic processing machine in China. We are aiming at serving small-scale corporations during our early business period and we have served more than 1000 small or middle-scale corporations producing various kinds of plastic products so far. This fact has lead to an extensive accumulation of technological”know how”and experience for us.

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