Granite slabs are precision measuring references made from natural stone. They are ideal for inspecting instruments, precision tools, and mechanical components. Their unique properties make cast iron slabs pale in comparison, particularly for high-precision measurement. Granite is sourced from high-quality underground rock layers. After millions of years of natural aging, its form remains extremely stable, eliminating the risk of deformation from typical temperature fluctuations. Granite, carefully selected and rigorously tested, boasts fine crystals and a hard texture, boasting a compressive strength of 2290-3750 kg/cm² and a hardness of 6-7 on the Mohs scale. They are extremely resistant to wear, acid, and alkali, and offer high corrosion resistance, never rusting. Because granite is a non-metallic material, it exhibits no magnetic properties and exhibits no plastic deformation. Its hardness is two to three times higher than that of cast iron (equivalent to HRC > 51), ensuring excellent precision retention. Even if a rock tool is knocked against a heavy object during use, at most a few grains of stone will fall off, without the deformation and loss of precision that can occur with metal tools. This material surpasses precision measuring reference components made of high-quality cast iron and steel, achieving high and stable accuracy.
Advantages:
Made from natural granite through machining and hand-polishing. It boasts a black luster, precise structure, uniform texture, and excellent stability. It offers high strength and hardness. It is rust-resistant, acid- and alkali-resistant, non-magnetic, non-deformable, and wear-resistant. It maintains stability under heavy loads and at moderate temperatures.
Granite slabs, precision granite slabs, granite inspection slabs, and instrument platforms are made from high-quality "Jinan Blue" stone through machining and hand-polishing. It boasts a black luster, precise structure, uniform texture, excellent stability, high strength, and high hardness. It maintains high accuracy under heavy loads and at moderate temperatures. It also features rust-resistant, acid- and alkali-resistant, wear-resistant, non-magnetic, and non-deformable properties. Granite slabs are suitable for measuring tools in machinery factories.
Features:
Granite slabs are primarily characterized by stable accuracy and easy maintenance. This is because:
① Granite slabs have a dense microstructure, a smooth, wear-resistant surface, and a low roughness value;
② Granite is naturally aged for a long time, completely eliminating internal stresses, resulting in a stable material that will not deform;
③ It is acid-resistant, alkali-resistant, corrosion-resistant, and anti-magnetic;
④ It will not rust due to moisture, making it easy to use and maintain;
⑤ It has a low linear expansion coefficient and is minimally affected by temperature;
⑥ Impacts or scratches on the working surface only produce pits, not ridges or burrs, which have no impact on measurement accuracy.
The main disadvantages of granite slabs are that they cannot withstand excessive impact or knocks, can deform in high humidity, and have a hygroscopicity of 1%.