marble component

Industury zone Zhaozhaizi count,GaoTang,LiaoCheng city,ShanDong province,China

ShanDong Square Precision Machinry company.Co.Ltd

Sales manager:Ms Nancy

Mobile:8613863549581

Fax:  +86 635  3831222

  Tel:  +86 635 3832999

We warnly welcome friends from all of the world to visit our website and our factory ,we will offer you the high quality product with compeitive price and our best sevice.hope this will be a start of our long term business cooperation that we called win-win.

6.       gloosy surface without sluggishness when the workplaces or tools are moving on it .

5.       nonmagnetization.

4.       any working surface cutting or scratching dose not bring about rough edges which  might influence its measuring presicion.

3.       wear resistance long service life

2.       No-rust and anticorrosion

1.       high precision reliable stability resistance to deform and guaranteed accuracy under normal ambient temperature.

Granite measuring tools have the following characteristics

Shore hardness :above Hs70

Water absorbtivity<0.13%

Linear expansion coefficient:0.0000461%(4.61*10^-6)

Elastic modulus:1.27-1.47 N/mm^2

Compression strength :245-254N/mm^2

Specific granvity:2970-3070kg/m^3

physical properties of JiNan Black :

 Our main products are granite inspection tables, squares, straight edges, square rulers, parallels, V-blocks, and granite components for high precision equipment such as granite bases and guide rails. Our machinery equipment can also finish the process of drilling holes, having slot and bonding inserts according to customers' requirements. Our granite surface table is calibrated according to JB/T7975-1999 and JJG117-91 standards and we can also make the granite measuring tools according to different countries' standard

Compressive Strength: 245-254Mpa
Elastic Modulus: 30-50Gpa
Linear Expansion Coefficient: 4.61x10-6/0C