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Granite precision square is a high-precision geometric measurement standard, primarily used for the inspection and calibration of perpendicularity, parallelism, and flatness, and is widely applied in fields such as machinery manufacturing, precision assembly, metrology calibration, and aerospace. I. Core Features (Why Granite)High Stability: Natural aging and internal stress release ensure long-term deformation-free performance; low coefficient…

Accuracy Grade Classification of Granite Parallel Rulers (Granite Straightedges)The domestic executive standard JB/T 7878-2017 “Rock Straightedges” divides them into three grades: Grade 00, Grade 0, and Grade 1, based on geometric tolerances such as straightness, working surface parallelism, and flatness. Grade 00 has the highest accuracy, and Grade 1 has the lowest.I. Core Determination Indicators…

Granite parallel bars (also known as granite parallel gauges / flat bars) are high-precision reference measuring tools made of natural granite (such as Jinan Green) through precision machining and manual grinding. Used in pairs, they are primarily used for parallelism, straightness, and flatness inspection, as well as equipment calibration. I. Core FeaturesStable Accuracy: Natural aging…

Advantages and Applications of Granite Comparison Table (Comparison Platform / Comparison Table)A granite comparison table is a specialized comparison inspection device integrated with a high-precision granite platform as the base body, equipped with components such as micrometers, dial indicators, dial test indicators, indicator holders, and limit blocks. It is also commonly referred to as a…

Daily Maintenance and Care Methods for Granite Surface PlatesGranite has high hardness and good stability, but it is susceptible to severe impacts, strong acids and bases, and long-term accumulation of dirt. Standardized maintenance can preserve its accuracy and appearance for a long time. The following instructions are divided into five major modules: daily cleaning, usage…

Granite Precision Parallel Blocks Application InstructionsGranite parallel blocks (also commonly known as parallel blocks, parallel plates, or height blocks) are made of natural granite. They feature high precision, minimal deformation, wear resistance, rust prevention, non-magnetism, and excellent stability. They are fundamental precision measuring tools for mechanical inspection, scribing, tooling positioning, and machine tool commissioning, and…

Application Scenarios and Uses of Granite Precision V-Blocks (V-Blocks)Granite V-blocks, made of natural black granite as the base material, feature high precision, strong stability, resistance to deformation, rust-proof, wear-resistant, non-magnetic, and corrosion-resistant properties. They are core precision measuring tools for machining, metrology, quality inspection, and tooling positioning, widely used in fields such as machinery, mold…

Granite precision square (also known as granite right angle square / straight edge) is a high-precision 90° reference gauge, primarily used for perpendicularity / right angle inspection, machine tool and equipment calibration, tooling positioning, and precision scribing. With its characteristics of non-magnetization, non-deformation, wear resistance, and excellent temperature stability, it is widely applied in fields…

I. First Step: Determine Granite Base Material and Grade (Most Critical)1) Stone Types (From High to Low)Indian Black (M10) / Imported Black Granite: High density, lowest thermal expansion coefficient, best stability, used for high-precision / laboratory-grade CMMs (aerospace, medical, optics).Jinan Green: Top domestic grade, good rigidity and vibration absorption, first choice for mid-to-high-end bridge machines;…

Application of Granite Bases in Coordinate Measuring Machines (CMM)Granite is the core reference carrier for the vast majority of stationary CMMs other than bridge-type, gantry-type, and portable ones. Due to its physical properties, it has become the preferred base material for precision geometric measurement, determining the equipment’s reference accuracy, operational stability, and service life.I. Core…