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                Welcome to BOTOU JIANXIN CAST IRON AND MEASURING TOOLS CO., LTD!

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                Organizational Structures Granite Measuring Table

                Organizational Structures Granite Measuring Table

                The granite properties determine the stiffness of the granite and accuracies can be guaranteed with less thickness than other types of granite

                Details

                Specifications


                uniform texture, nice stableness, high intensity
                more stable, and wears longer
                industrial production&laboratory measurement

                Organizational Structures Granite Measuring Table

                Granite is applicable to the works of industrial production and laboratory measurement.

                - For high precision operations in temperature controlled gauging rooms and metrology departments

                - For general quality control use

                - For shop work and production checking



                Salient Features:



                SURFACE PLATES are made of black granite which is stronger and denser than light colored granite, more stable, and wears longer.

                The granite properties determine the stiffness of the granite and accuracies can be guaranteed with less thickness than other types of granite.

                - This translates to less freight and handling whenever the plate is shipped or moved.

                - The main mineral components of granite include pyroxene, plagioclase, a little olivine, biotie and trace magnetite.

                - It is precise in structure with black luster and through hundreds of millions years aging.

                - it is of uniform texture, nice stableness, high intensity and rigidity, and can maintain a high precision under heavy weight.



                Specification:


                The precision of the granite surface plates is in line with the standards of advanced countries.
                Tolerance of planeness: Standard JB/T7975-1999
                Grade 000 = 1 × ( 1+d/1000 ) μm
                Grade 00 = 2 × ( 1+d/1000 ) μm
                Grade 0 = 4 × ( 1+d/1000 ) μm
                Grade 1 = 8 × ( 1+d/1000 ) μm
                ( "d" is the diagonal mm ) (The measuring temperature is normally 20±2°C )

                Physical Properties: 

                Specific Gravity

                :

                2970-3070Kg/ m3

                Compressive strength

                :

                245-254N/m m2

                Water absorption

                :

                <0.13%

                Elastic Modulus

                :

                1.27-1.47 GPa

                Linear Expansion Coefficient

                :

                4.61×10-6 /°C

                Shore hardness

                :

                >Hs70

                 

                 

                Specification: Any special specification can be made according your requirement.     

                specification(Lx W)mm precision grade
                0 1 2 3
                flatness tolerance (um)
                200×200 3.5 7 14 27
                300×200 4 8 15 30
                300×300 4 8 15 30
                300×400 4 8 16 32
                400×400 4.5 8.5 17 34
                400×500 4.5 9 18 35
                400×600 5 10 19 37
                500×500 5 10 19 37
                500×600 5 10 19 39
                500×800 5.5 11 21 43
                600×800 5.5 11 22 44
                600×900 6 11.5 23 46
                1000×750 6 12.5 25 50
                1000×1000 7 13.5 27 54
                1000×1200 7 14 29 58
                1000×1500 8 16 32 63
                1000×2000 9 18.5 37 74
                1500×2000 10 20 40 80
                1500×2500 11 22.5 45 90
                1500×3000 13 25 50 100
                2000×2000 11 22 44 88
                2000×3000  13 27 53 106
                2000×4000   16 32 64 127
                2000×5000   19 37 75 150

                 

                 

                As a manufacturer,we would like to give youa best price&high quality.

                Your inquiry will be highly appreciated.

                 

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