Qingdao Qianshao Precision Instrument Co., Ltd.  

Product Name: High Precision Granite Square Rulers Model NO.: SF Customized: Customized Certification: JIS, DIN, GB, SGS, ISO Precision Measuring Device: Precision Measuring Device Accuracy: A Measure Method: Manual Precision: 0.001mm Resolution: 0.001mm Range: 0?500mm Measurement Object: Squareness Material: Granite Type: Granite Square Brand Name: Qianshao Color: Black Precision Grade: 00 Trademark: Qianshao Transport Package: Wooden Case Specification: SGS Origin: Qingdao China HS Code: 9031900090 Product Description High Precision Granite Square RulersQIANSHAO is the leading manufacturer of Granite Surface Plates since 1979, providing various kinds of high accuracy and quality products.Product Speciality:1. Made of high quality Jinan Black Granite2. High precision and high stability.3. No rust and anticorrosion.4. Non magnetization.5. Good abrasion resistance.Physical Property of Jinan Black Granite:Specific Gravity: 3.03 g/cm3Shore Hardness: > 70Hs-80HsTensile strength: 211Kg/cm2Compressive Strength: 245-254MpaLinear Expansion Coefficient: 4.61´10--6/°CElastic Modulus: 30-50GpaWater Absorptivity: ≤0.13%Product Application:1. Mainly used as installation and inspection of machine tools, inspect vertical degree, parallelism and straightness of guideways and precision components in modern industry and scientific research institutes.Specifications :modelsquareness between adjacent measuring surfacesstraightness of measuring surfaceparallelism between opposite measuring surfacesoverall dimension(mm)weight/unit(kg)precision grade(µm)000000000SF200240.91.824200×200×354.4SF2502.24.5122.24.5250×250×407.15SF3152.65.21.12.32.65.2315×315×4512.2SF400361.32.636400×400×4517.4SF400A361.32.636400×200×407.6SF5003.571.533.57500×500×6050.1Note : We are able to manufacture according to customer's specifications.