Characteristics and Applications of Granite Square Ruler

         Granite square ruler, also known as marble square ruler, is a precision benchmark measuring tool.

       The granite square ruler produced by Jinan East Star Precision Measure Co.，Ltd. is made of natural stone such as "Jinan Qing", which is processed by machinery and manually ground. It is mainly used to detect the straightness, parallelism, and perpendicularity of high-precision components, and can also be used as a 90 ° measurement benchmark. It is an ideal benchmark for inspecting instruments, precision tools, and mechanical parts.

      Product Features：

      High precision: The granite square ruler is made from high-quality underground rock layers that have undergone billions of years of natural aging. Its organizational structure is uniform, the coefficient of linear expansion is extremely small, and the internal stress completely disappears. Therefore, it has the characteristics of no deformation and high precision.

     High hardness: The main mineral components are pyroxene, plagioclase, etc., with a hard texture, fine crystallization, and wear resistance.

     Strong corrosion resistance: Granite stone rulers have the characteristics of non rusting, acid and alkali resistance, and can adapt to a wider range of working environments.

     Non magnetic: The granite ruler is made of non-metallic materials and has little magnetic reaction or plastic deformation. It can move smoothly during measurement without any sluggishness.

     Accuracy level: Granite rulers are divided into three levels: level 0, level 00, and level 000, with increasing accuracy in sequence.

     Specification and size: Common specifications include 160 × 160mm, 200 × 200mm, 250 × 250mm, 300 × 300mm, 400 × 400mm, 500 × 500mm, etc. Special specifications can be customized according to needs.

     Granite square rulers are widely used in fields such as mechanical manufacturing, automotive industry, aerospace, and metrology testing. Used for precision testing of components in mechanical manufacturing; Used for production process measurement of key components in the automotive industry; Used in the aerospace field for detecting components with extremely high precision requirements; Used as a benchmark measuring tool in the field of metrology and testing.