Specific granvity:2970-3070kg/m^3 Compression strength :245-254N/mm^2 Elastic modulus:1.27-1.47 N/mm^2

Granite

Our granite measuring tools and granite mechanical components are made of high quality “jinanqin”granite . due to their high precision ,long duration ,good stability and corrosion resistance ,they have been more and more widely used in products-inspection in the  mordern inderstrise,and such high tech areas as mechanical caerospace and scientific research .

physical properties of “JiNan Black ”

Specific granvity:2970-3070kg/m^3

Compression strength :245-254N/mm^2

Elastic modulus:1.27-1.47 N/mm^2

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

Water absorbtivity<0.13%

Shore hardness :above Hs 70

Granite measuring tools have the following characteristics

high precision reliable stability resistance to deform and guaranteed accuracy under normal ambient temperature.No-rust and anticorrosion wear resistance long service life any working surface cutting or scratching dose not bring about rough “edges”which  might influence its measuring presicion.nonmagnetization.gloosy surface without sluggishness when the workplaces or tools are moving on it

CMM base