Granite square box material for the Jinan blue, granite has black gloss, structural precision even texture, good stability, high strength, high hardness Face scraping or using precision grinding process for measuring the straightness of the workpiece and verticality and equipment installation.
Granite square box uses: detecting components, parts, machine table, flat, vertical rails and precision work I produced the granite square box and has: high precision, no rust, acid , not magnetized, the same type, and good abrasion resistance. can remain stable under heavy duty and general temperature.
Granite square box is a precision reference measurement tools, natural stone material, for instruments, precision tools, machinery parts of the test, is an ideal base, granite square box especially for high- precision measurements. Granite square box based on the quality of the rock layers underground, after millions of years of natural aging, form extremely stable, do not worry because the conventional temperature and deformation.
Granite square box through rigorous physical testing and selection of granite materials, crystal fine, hard texture due to the granite-based non-metallic materials, no magnetic response, no plastic deformation of its high hardness, so to maintain good accuracy . Granite square box in use, even by heavy bump, up out of fresh ballast only. The superior quality granite square box made of cast iron and steel parts precision measurement reference, to obtain high and stable accuracy.