Natural granite material is made by machining, manual refinements, black plate, structural precision even texture, good stability, strong strength, high hardness. And it has advantages of non-magnetized, acid and alkali resistance and good abrasion resistance. Can remain stable under heavy duty and general temperature. Granite surface plate is precision reference measurement tools made of natural stone materials, it is an ideal datum plane for instruments, precision tools, machinery castings inspection, particularly for high-precision measurements.
Granite surface plate based on the underground quality of the rock, after millions of years of natural aging, shape is extremely stable, do not worry deformation because the conventional temperature. Granite surface plate through rigorous physical testing and select granite materials, because granite belongs to non-metallic materials, no magnetic response, no plastic deformation. Granite surface plate has high hardness, so maintain good accuracy. Maintenance is convenient and simple. at room temperature can be maintained temperature accuracy.