A marble/granite square ruler is a measuring tool made of natural marble or granite. The following is an introduction to it:

purpose

• Verticality detection: used to detect the verticality between components of machine tools and mechanical equipment, such as columns and workbenches, guide rails and workbenches, to ensure the accuracy of equipment assembly and operation.

• Parallelism detection: It can measure whether the surface of components, machine tool worktable, etc. are parallel, ensuring the parallelism requirements of related components during processing and assembly.

• Straightness detection: Measure and evaluate the straightness of machine tool guides, shaft components, etc., to determine whether they are bent or deformed, ensuring the accuracy of linear moving parts.

As a precision marking reference: In precision machining and measurement, it provides a precise right angle reference for marking tools to ensure the accuracy of marking, thereby ensuring the precision of subsequent machining.

Calibration of measuring instruments: used to calibrate some instruments and equipment that require high-precision measurement, such as calibrating the verticality and parallelism of measuring tools such as micrometers and dial indicators, to ensure the accuracy and reliability of measuring instruments.

advantage

• High precision: Made from high-quality underground rock layers that have undergone billions of years of natural aging, the tissue structure is uniform, the coefficient of linear expansion is extremely small, the internal stress completely disappears, it is not easy to deform, and can maintain high precision for a long time.

Good stability: The material is stable and will not easily deform due to changes in temperature, humidity, or long-term use, making it suitable for various complex working environments.

Strong wear resistance: The texture is hard, the crystal is fine, and it is extremely wear-resistant. Its hardness is 2-3 times higher than that of cast iron materials. Even if it is hit by heavy objects, at most a few pieces of debris will fall off, and it will not damage the accuracy due to deformation like metal tools.

Good corrosion resistance: acid resistant, alkali resistant, corrosion-resistant, anti magnetic, will not get damp or rust, easy to use and maintain, long service life.

Surface smoothness: Made by hand grinding, the surface smoothness is extremely high, and it can move smoothly during measurement without any roughness, which is conducive to improving the accuracy of measurement.

precautions

Handle with care: During use, attention should be paid to avoiding collisions and falls, and to prevent dents from appearing on the surface of the square ruler, which may affect accuracy.

• Regular maintenance: When not in use for a long time, it should be wiped with special lubricating oil or edible oil. When used again, it should be wiped dry with a soft cloth. If the surface is dirty, it can be cleaned with lemon juice or vinegar.

Key points for purchasing

Accuracy level: Choose the appropriate accuracy level according to actual usage needs, such as level 00, level 0, etc. The higher the accuracy level, the smaller the error.