METROLOGY SPECIAL APPLICATIONS
Firstly, GMT manufactures a complete range of standard granite and cast iron equipment for dimensional metrology. Our Metrology Division also manufactures special metrology products like master squares to align machining centres, large-sized granite plates, and granite base structures for Special Purpose Machines.
GRANITE FOR METROLOGY
Certain minerals present in the granite are the cause of its typical colour. Also, the presence of these minerals on the working surface of a surface plate, or other metrology artefacts, can cause problems. If these minerals are very hard and brittle (quartz, e.g.), they can wear quickly, leaving pitted areas on the surface.
Similarly, it is an acknowledged fact that pure black granite from the Deccan plateau in South India is most resistant to wear. This does not mean that other colours do not have metrology characteristics. Furthermore, as granite is a natural material and its properties can vary from vein to vein in the quarry, it is best to test the rough stone periodically for its properties. Another critical factor is that experts from GMT visit quarry to select and test, if necessary, the granite best suited for metrology.
Besides, granite used in special metrology applications is made from select granite with a uniform distribution of light and dark constituents. Also, in such granite, the distribution of minerals is uniform, resulting in a homogenous appearance.
Texture : Fine
Specific Gravity : 3.08 g/cm3
Hardness : Scleroscope over 90
Modules of Elasticity : 9.0 to 12.0 x 105kg/cm2
Moisture of absorption : Nil
CUSTOM MADE PRECISION GRANITE MACHINE & REFERENCE BASES
Click on image for enlarged view
WHY USE GMT METROLOGY SPECIAL APPLICATIONS?
GMT has developed hundreds of special structures for optic, semiconductor, nuclear, aerospace and medical applications. The company has unparalleled experience in drilling granite and bonding it with other materials. As a result, the company has earned the trust of its customers and a premier place in the market.
As a result of GMT’s experience in producing machine tools and dimensional reference equipment over six decades, we have the skills to manufacture a wide variety of special products for application in metrology.
Finally, please visit us at https://gmtmachinetools.blogspot.com– a new blog dedicated to all GMT customers…interact with our technical experts.