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Measurement & Analysis Instruments
For Inspecting the straightness and flatness.Welcome your inquiry for specification.
Our granite measuring devices and granite mechanical components are made of high qualityJinan Blackgranite.Due to their high precision,long duration,good stability and corrosion resistance,they have been more and more used in product inspection of modern industy and such scientific areas as mechanicalaerospace and scientific researches.
Granite Straight Edges
The "GOLD STONE"brand of granite measuring tools have the following characteristics:
Granite Straight Edges
1 High precision reliable stability resistant to deform and guaranteed accuracy under normal ambient temperature.
2 No-rust and anticorrosion.Granite Straight Edges
3 Wear resistance long service life.
4 Any cutting or scraching for working surface does not bring about roughedgeswhich might influence its measuring precision.Granite Straight Edges
5 Non magnetization.
6 Glossy surface without sluggishness when the workpieces or tools are moving on it.
Physical Property ofJi Nan Black Granite:
Measurement & Analysis Instruments
Granite Straight Edges
dGranite cube
| Phisical Property | Reference Value |
| Specific Gravity | 2970-3070kg/m3 |
| Compressive Strength | 245-254Mpa |
| Elastic Modulus | 30-50Gpa |
| Linear Expansion Coefficient | 4.61x10-6/0C |
| Water Absorptivity | ≤0.07 |
| Shore Hardness | Above 70Hs |
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