Granite Squares.
Brand name:The "GOLD STONE"brand of granite measuring tools
Material:Ji Nan Black
Granite Squares
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.
Physical Property ofJi Nan BlackGranite:
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
The "GOLD STONE"brand of granite measuring tools have the following characteristics:
1 High precision reliable stability resistant to deform and guaranteed accuracy under normal ambient temperature.
2 No-rust and anticorrosion.
3 Wear resistance long service life.
4 Any cutting or scraching for working surface does not bring about roughedgeswhich might influence its measuring precision.
5 Non magnetization.
6 Glossy surface without sluggishness when the workpieces or tools are moving on it.
For inspecting machine spindle and else squareness work-pieces.
TYPE(mm) | Squareness between neasuring surface datum surface | Flatness& straightness of measuring surface | flatness& straightness of datum surface | |||
Precision grade(μm) | ||||||
00 | 0 | 00 | 0 | 00 | 0 | |
100x63 | 1.5 | 3 | 1 | 1 | 1 | 1 |
160x100 | 2 | 4 | 1 | 2 | 1 | 1 |
250x160 | 2 | 4 | 1 | 2 | 1 | 2 |
400x250 | 3 | 6 | 1.5 | 3 | 1 | 2 |
630x400 | 4 | 8 | 2 | 4 | 1.5 | 3 |
1000x630 | 6 | 12 | 2.5 | 5 | 2 | 4 |
