Precision Granite Straight Ruler

"Precision Granite Straight Ruler" is a high - precision measuring tool made of granite, which is widely used in various industries and fields that require precise measurement. Here is a detailed introduction:

Characteristics

High Precision: Granite has excellent physical and mechanical properties. After precise processing, the straightness and flatness of the precision granite straight ruler can reach a very high level, usually with an accuracy error within a few microns, which can meet the needs of high - precision measurement.

Good Stability: The internal structure of granite is dense and stable, with a low coefficient of thermal expansion. It is less affected by temperature, humidity and other environmental factors, and can maintain stable measurement accuracy during long - term use.

High Hardness and Wear Resistance: Granite has a high hardness, second only to diamond and corundum. It has strong wear - resistance and is not easy to be scratched or deformed during the measurement process, which can ensure the long - term accuracy and service life of the measuring tool.

Good Corrosion Resistance: It has good resistance to acid, alkali and other chemical substances, is not easy to rust and corrode, and can maintain good performance in a variety of working environments.

Specifications and Accuracy

Common Specifications: The length of precision granite straight rulers usually ranges from 100mm to 2000mm, and the cross - section is generally rectangular. Common specifications include 300mm×50mm×25mm, 500mm×80mm×30mm, 1000mm×100mm×40mm, etc. Different specifications can meet the measurement needs of different workpieces and occasions.

Accuracy Levels: They are generally divided into different accuracy levels such as grade 00, grade 0 and grade 1. Grade 00 has the highest accuracy, suitable for ultra - high - precision measurement and calibration work; grade 0 is suitable for high - precision measurement occasions; grade 1 has relatively lower accuracy and is suitable for general precision measurement work.

Applications

Machining and Manufacturing: It is used to measure the straightness, flatness and parallelism of mechanical parts, and is an important tool for ensuring the machining accuracy of parts and the assembly quality of equipment.

Instrument and Equipment Calibration: In the calibration process of precision instruments and equipment, such as coordinate measuring machines, laser trackers, etc., the precision granite straight ruler is used as a standard reference to ensure the accuracy and reliability of the calibration results.

Quality Inspection and Control: In the quality inspection process of products, it is used to detect whether the linear dimensions and geometric tolerances of products meet the requirements, helping enterprises to improve product quality and reduce defective products.

Usage and Maintenance

Usage Methods: Before use, the surface of the precision granite straight ruler should be cleaned to ensure that there is no dust, oil and other impurities. When measuring, the straight ruler should be placed on the measured surface stably, and the measurement should be carried out along the length direction of the straight ruler. For high - precision measurement, it is necessary to use appropriate measuring instruments, such as dial indicators, electronic level gauges, etc., in combination to improve the measurement accuracy.

Maintenance Points: The precision granite straight ruler should be handled with care to avoid collision and falling, so as to prevent damage to the measuring surface. After use, it should be wiped clean with a clean, soft cloth and placed in a dry, ventilated place. It is recommended to regularly send the straight ruler to a professional metrology institution for calibration and maintenance to ensure its accuracy and performance.