Granite square boxes are used for inspection of instruments, precision tools, and mechanical components. The granite square box is made of high-quality rock layers underground, and after billions of years of natural aging, its shape is extremely stable, without worrying about deformation due to conventional temperature differences.

Granite box performance: The granite material selected through rigorous physical testing has fine crystallization and a hard texture. Due to its non-metallic nature, granite has no magnetic reaction or plastic deformation. Its hardness is high, therefore it has good accuracy retention.

Precision of granite square box: Even if it is bumped by heavy objects during use, at most a few stone fragments will fall off. Granite square boxes are superior to precision measuring reference parts made of high-quality cast iron and steel, and can achieve high and stable accuracy.

Granite square box: Its material is granite with black luster, precise structure, uniform texture, good stability, high strength, and high hardness. The working surface adopts scraping or precision grinding technology for measuring the straightness and perpendicularity of workpieces and equipment installation.

Granite square box: flatness and verticality of guide rails and precision work. The granite square boxes produced by our company have the advantages of high precision, rust resistance, acid and alkali resistance, non magnetization, invariance, and good wear resistance. Can maintain stability under heavy loads and normal temperatures.