Compared with traditional steel straight edge rulers, this granite straight edge ruler has obvious advantages. First, it uses high-density natural granite material, which has high hardness and excellent wear resistance, ensuring that the straightness accuracy can be maintained for a long time. Second, it meets the grade 00 straightness standard, with straightness deviation ≤0.8μm per meter, meeting the needs of ultra-high precision detection. Third, it is non-magnetic, which will not adsorb iron filings and other impurities, keeping the working surface clean and accurate. In addition, its lightweight design is easy to carry, suitable for on-site detection and mobile use scenarios.
This granite straight edge ruler supports custom lengths, with conventional specifications including 500mm, 800mm, 1000mm, 1500mm and so on. The standard 1000×60×40mm model weighs about 15kg, with straightness deviation ≤0.8μm/m, surface roughness Ra≤0.6μm. It has passed ASTM E328 and GB/T 20453-2006 certifications, with no internal pores or cracks on the surface, and the working surface has high flatness and straightness.
This granite straight edge ruler is mainly used for the straightness detection of machine tool guide rails, ensuring the movement accuracy of the machine tool. It is also used for the straightness and flatness detection of steel plates, aluminum profiles and other sheet metal parts, as well as the scribing of workpiece straight lines in the machining process. In the printing and packaging industry, it is used for the debugging of printing presses and packaging equipment, ensuring the alignment accuracy of the production line.
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