Views: 300 Author: Site Editor Publish Time: 2025-11-24 Origin: Site
Granite square, also known as granite square or inspection square, is a reference measuring tool used to check the verticality of workpieces in mechanical processing, inspection and assembly. It occupies an irreplaceable position in the field of precision manufacturing due to the natural properties of its materials.
Core advantages
Compared with steel or other metal squares, granite squares have the following unparalleled advantages:
1. Extremely high stability and precision durability
Physical properties: After hundreds of millions of years of natural aging, the internal stress of natural granite has been completely eliminated, and it will hardly deform due to time or stress release.
Accuracy maintenance: Once precision machined, its right-angle accuracy can remain unchanged for decades without frequent calibration, making it an ideal choice for establishing a benchmark.
2. Excellent thermal stability
Low thermal expansion: The thermal expansion coefficient is small. Under daily temperature fluctuations in the workshop, its dimensional changes are minimal, ensuring the reliability of the test results.
3. Excellent rigidity and wear resistance
High rigidity: Although its density is lower than steel, its structural rigidity is high and its deformation is small under its own weight.
Super wear-resistant: The hardness is as high as Mohs level 7, and its wear resistance is far superior to that of metal. It can still maintain sharp edges and smooth surfaces after long-term use, and has a long service life.
4. Non-corrosive and non-magnetic
Anti-corrosion: It has strong corrosion resistance to coolant, lubricating oil and workshop environment, and will never rust.
Non-magnetic: It is non-magnetic and will not be magnetized. It is especially suitable for precision measurement environments where magnetic interference needs to be avoided.
Main application areas
With its high precision and stability, granite squares are widely used in all fields that have strict requirements for right angles:
1. Precision machining and manufacturing
Machine tool debugging and testing: used to detect the verticality of CNC machine tools, machining center spindles and worktables.
Workpiece inspection: Inspect the verticality and parallelism of the workpiece during marking, processing and assembly.
2. Coordinate measurement and testing laboratory
CMM benchmark: As an auxiliary tool for three-dimensional coordinate measuring machines, it establishes detection benchmarks for large or special-shaped workpieces.
Precision testing: In the measuring room, it is used as a transfer reference to verify the accuracy of other measuring tools or conduct quality testing of high-precision products.
3. Automation and Robotics Integration
Equipment installation and calibration: Used to calibrate the vertical relationship between the robot arm end, the worktable and the conveyor line to ensure the movement accuracy of the automation unit.
Vision system positioning: Provides a vertical reference for the installation of machine vision cameras and light sources.
4. Semiconductor and electronics industry
Equipment manufacturing: As a key benchmark tool in the manufacturing and assembly of ultra-precision equipment such as photolithography machines and wafer inspection equipment.
Clean room environment: Its dust-free and non-shedding characteristics fully meet the requirements of clean rooms.
5. Mold industry
Mold inspection: used to inspect the verticality of the mold frame and slider of large injection molds and stamping molds to ensure mold closing accuracy.
In summary, the granite square is not only a simple measuring tool, but also the cornerstone of establishing and delivering "vertical accuracy" in the modern industrial system. When choosing a reference gauge with high reliability, long life and low maintenance costs, granite squares are always the top choice.
