Marble platform

About Granite Granite precision measuring tools precision measuring tools, using high-quality "Jinan Green" stone by machining and manual refinements made. High precision, long life, suitable for mechanical plant measurements and quality control. "Jinan Green" stone, is basil gabbro. Commonly known as "Diabase" black color, structural precision, after millions of years of aging, even texture, good stability, high strength, high hardness, able to maintain accuracy under heavy load. "Jinan Black" granite physical properties: Specific gravity: 2970 ~ 3070kg / m acid ratio: 98.79% compressive strength: 2500 ~ 2600kg / m clean / degree: Δ11 ~ 13 class resiliency coefficient: 1.3 ~ 1.5 × 106 kg / cm2 linear expansion coefficient: 4.61 × 10-6 / C Water absorption: 0.15% Shore hardness: 60-65HS "Jinan Green" granite measuring product has the following advantages: the long-term natural aging rock, organizational structure uniform, linear expansion coefficient, internal stress completely disappeared, high precision products, good stability, easy to distort, at ambient temperatures to ensure accuracy. Acid and alkali, corrosion-resistant, not rust, easy maintenance, simple, long life, surface scratches, magnetic collision, does not affect the measurement accuracy is not constant limitation, at room temperature can ensure accuracy. High hardness, their wear, surface finish, not magnetized, unaffected by moisture, a good plane stability, measurements can smoothly slide, no tight feeling. This product has a long history of manufacturing, advanced technology, sophisticated quality, strong technical force, the implementation of "three guarantees" do with shipping, the industry welcomes new and old friends to buy. Botou Jingda Tools Co., Ltd.