Granite Squares
Made of well selected marble stone.
We have standard size in stock.
Port: Tianjin or Shanghai port
Minimum Order Quantity: 1 Piece/Pieces
Supply Ability: 1000 Piece/Pieces per Month
Payment Terms: L/C,T/T,Western Union
Contact SupplierPackaging Detail: wooden packing
Delivery Detail: with in 7-30days after order is confirmed
Granite Squares
The Jingda granite series instruments are made of high quality Jinan black granite stone.Due to the high precision,long duration,good stability and corrosion resistance,they have been more and more used in product inspection of modern industry and scientific areas as mechianical space and scientific researches.
The precision of our products is in line with the standards of advanced countries.Grade "0",grade "00" and grade"000" are valid.We have standard size in stock.and for special size we can make according to your requirements.
Granite square ruler is mainly used for inspection and scribing of the right angle of various parts and also used for the perpendicularity measurement of relevant surfaces of parts during the installation and maintenance of equipment.
Granite square ruler is mainly used for testing the perpendicularity and parallelism of the workpieces or tools.
Typemm) | Squareness between measuring surface and datum surface | Flatness and straightness of measuring surface | Flatness and straightness of datumsurface | |||
Precision Grade (μm) | ||||||
00 | 0 | 00 | 0 | 00 | 0 | |
100×63 | 2 | 4 | 1 | 1 | 1 | 1 |
160×100 | 2 | 4 | 1 | 2 | 1 | 1 |
250×160 | 2.5 | 5 | 1 | 2 | 1 | 2 |
400×250 | 3.5 | 7 | 1 | 2.5 | 1 | 2 |
630×400 | 4.5 | 9 | 1.5 | 3 | 1 | 2.5 |
1000×630 | 6 | 12 | 2.5 | 5 | 1.5 | 5 |
Physical properity of Jinan black granite:
Specific gravity:2970-3070kg/CBM
Compressive Strength:245-254Mpa
Elastic Modulus:30-50Gpa
Linear Expansion Coefficient:4.61×10-6/0C
Water Absorptivity:0.07
Shore Hardness:Above 70Hs
The products have the following characteristics:
1.High precision,reliable stability resistant to deform and guaranteed accuracy under normal ambient temperature.
2.No-rust and anti-corrosion.
3.Wear resistance and long servic life.
4.Any cutting or scratching for working surface does not bring about rough edges which may influence its measuring precision.
5.Non magnetization.
6.Glossy surface without sluggishness when the workpieces or tools are moving on it.
Please send us inquiry for quotations ,we will offer you very competitive prices with high quality .Hope this will be a nice start of our long business cooperation.