Precision 00 grade black granite

Precision 00-grade black granite is a high-quality material used for manufacturing precision measuring tools and components.Here is a detailed introduction:

Characteristics

High Precision:It is processed to a very high flatness standard.According to the JB/T 7975-1999 standard,the flatness tolerance of 00-grade black granite is

2×(1+d/1000)μm(whered is the length of the diagonal).For example,for a 300mm×300mm granite plate,the flatness tolerance is 3μm,which can meet the high-precision measurement requirements in the fields of aerospace,electronics,and precision machinery manufacturing.

Excellent Material Properties:Black granite has good stability,high hardness,and strong wear-resistance.It has gone through long-term natural aging,and its internal stress is completely eliminated,so it is not easy to deform.In addition,it has the characteristics of corrosion-resistance and non-magnetism,which can avoid the interference of external environmental factors on the measurement results.

Good Surface Quality:The working surface of precision 00-grade black granite is processed by precision grinding and polishing,with a small surface roughness value,which can reach Ra0.05-Ra0.1μm.This ensures a smooth and flat surface,which can effectively reduce the friction during measurement and improve the accuracy and repeatability of measurement.

Applications

Manufacture of Precision Measuring Tools:It is widely used in the manufacture of precision measuring tools such as granite surface plates,angle gauges,and square rulers.These measuring tools are used in the inspection and calibration of high-precision parts to ensure the accuracy of part processing.

Base of Precision Equipment:It can be used as the base material of precision equipment such as coordinate measuring machines,drilling and milling machines,and laser machines.The high-precision flat surface of black granite provides a stable support for the accurate operation of the equipment,which helps to improve the processing accuracy and quality of the equipment.

Optical and Electronic Fields:In the optical and electronic fields,precision 00-grade black granite is used to manufacture components such as optical benches and electronic component carriers.Its high flatness and stability can ensure the accuracy of optical path alignment and the stability of electronic component installation,which is of great significance for improving the performance of optical and electronic devices.

Maintenance and Care

Cleaning:Regularly wipe the surface of black granite with a clean and soft cloth to remove dust,oil,and other impurities.Avoid using rough or corrosive cleaning agents to prevent damage to the surface accuracy.

Storage:It should be stored in a dry and constant-temperature environment,away from moisture,heat,and cold to prevent deformation caused by changes in temperature and humidity.It is best to place it in a special storage box to avoid collision and damage.

Handle with Care:During use and transportation,it should be handled with great care.Avoid collisions,drops,or strong vibrations to prevent damage to its accuracy.

Regular Calibration:To ensure the measurement accuracy,it is recommended to send the precision 00-grade black granite to a professional metrology institution for calibration regularly.The calibration cycle is generally determined according to the frequency of use and actual conditions,usually one year or half a year.