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  • Granite Surface Plate
    Granite Surface Plate

    Granite Surface Plate

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    The flat granite surface plate is a precision measuring tool made of natural stone material. It is mainly used to inspect the instrument, precision tool, mechanical parts. Its raw material is got from the qualified lithosphere, which has gone through the natural aging for eons of time. That means our product has dimensional stability. Our granite measuring products will not deform because of the conventional temperature difference. If necessary, our granite surface plate can be processed with T-shaped grooves, threaded holes, etc.


    Precision Requirement

    The flatness tolerance is compliance with the GB4987-85 standard:

    000 Grade: 1×(1+d/1000)um;

    00 Grade: 2×(1+d/1000)um;

    0 Grade: 4×(1+d/1000)um;

    1 Grade: 8×(1+d/1000)um

    Salient Features :

    Made from close-grained Granite having uniform color and texture having hardness between 5.6 to 7 on Moh's scale, sound and free from flaws fissures and large inclusions of softer minerals.
    Made generally as per GB117-2015. Also available on request conforming to DIN-876-1972, BS-817-1988, JIS -B-7513 and US Federal specification GGG-P-463-C.
    metallic threaded inserts, metallic T-slots, Plates with two or four ledges also can be supplied against specific request at extra cost.
    Rexine cover provided for top working surface with each Plate.
    steel stand with leveling screws are available on request at extra cost.
    Granite Lapping Plates square and rectangular available on request.
    Also available in Grade 00 as per DIN 876.
    Sizes offered from 200x300mm to 8000x2000mm
    Other sizes are also offered on request. 

     

    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%

     
    Product Application:
     
    Mainly used to measure parallel and equal altitude of precision instrument, precision tool, mechanical component in modern industry and scientific research institutes.
     We are able to manufacture the Granite Surface Plate with the good and stable flatness according to standard of DIN/JIS/GB.


    Standard size for reference

    Specification

    Length × Width × Thickness (mm)

    Weight (kgs)Precision Grade (μm)
    0000001
    300 × 200 × 50171.53612
    300 × 300 × 50191.53612
    400 × 300 × 70251.53612
    400 × 400 × 704823.56.513
    630 × 400 × 1007623.5714
    630 × 630 × 10015524816
    800 × 500 × 13015624816
    1000 × 630 × 1302842.54.5918
    1000 × 750 × 1503382.55918
    1000 × 1000 × 1504502.551020
    1600 × 1000 × 200963361224
    2000 × 1000 × 20012003.56.51326
    1600 × 1600 × 30023123.56.51326
    2000 × 1600 × 30028903.571428
    2500 × 1600 × 3003612481632
    3000 × 2000 × 50090304.591836
    4000 × 2000 × 500120405.5112244
    6000 × 2000 × 700252847.5153060
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    Tel:+86 180 3272 6169

    E-mail: ada@willingmachine.com

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