Granite has long been recognized as the preferred material for precision measuring tools thanks to its excellent physical and mechanical stability. Unlike metal, granite does not rust, warp, or deform under temperature variations, making it the ideal reference material for measurement applications in laboratories, factories, and metrology centers. At ZHHIMG, our granite measuring tools are manufactured using premium Jinan Black Granite, offering superior hardness, wear resistance, and dimensional stability that meet and exceed international standards.
The specifications of granite measuring tools are defined according to their intended precision level. Flatness tolerance is one of the most critical parameters, directly influencing the reliability of measurements. High-grade granite tools such as surface plates, straightedges, and squares are manufactured to achieve micron-level flatness tolerances. For instance, a precision surface plate may reach a flatness of 3 µm per 1000 mm, while higher-grade tools used in calibration laboratories can achieve even finer tolerances. These values are determined according to standards such as DIN 876, GB/T 20428, and ASME B89.3.7, ensuring global compatibility and consistency.
Besides flatness, other important specifications include parallelism, squareness, and surface finish. During production, each granite tool undergoes rigorous inspection using electronic levels, autocollimators, and laser interferometers. ZHHIMG’s advanced manufacturing process ensures not only geometric precision but also uniform material density and stable long-term performance. Every tool is subject to strict temperature and humidity control during machining and testing to minimize environmental influence on measurement accuracy.
Maintenance also plays a vital role in preserving the accuracy of granite measuring tools. Regular cleaning to remove dust and oil, proper storage in a temperature-stable environment, and periodic recalibration can significantly extend their service life. Even small particles of debris or improper handling can cause micro-abrasions that affect measurement accuracy, so users should always follow proper operating procedures. When the surface flatness begins to deviate from the specified tolerance, professional re-lapping and calibration services are recommended to restore original accuracy.
With decades of expertise in precision granite manufacturing, ZHHIMG provides customized granite measuring tools designed for specific industrial requirements. From standard surface plates to complex measuring bases and non-standard structures, our products guarantee exceptional dimensional accuracy and long-term stability. The combination of high-quality materials, advanced processing technology, and strict quality control makes granite an irreplaceable benchmark in the world of precision measurement.
Post time: Oct-28-2025