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  • Granite Guideways

    Granite Guideways

    Granite Guideways Granite Guideways
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    Granite rail is used in CMM, drilling& milling machines for PC board,Laser machines and CNC as a guideway with Grade00 of DIN876/GB/JIS .

     

    Physical Property of Jinan Black Granite:

     

    Specific Gravity: 3.03 g/cm3
    Shore Hardness: > 70Hs-80Hs
    Tensile strength: 211Kg/cm2
    Compressive Strength: 245-254Mpa
    Linear Expansion Coefficient: 4.61´10--6/°C
    Elastic Modulus: 30-50Gpa
    Water Absorptivity: ≤0.13%


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