Precision Granite Surface Plate

The Precision Granite Surface Plate is a high-end reference tool designed for ultra-accurate measurement,precision calibration,and fine machining,playing an irreplaceable role in modern industrial quality control.It is meticulously crafted from high-density natural granite(commonly Jinan Black granite),which undergoes a series of strict processing procedures to ensure its superior precision and long-term stability.

Compared with ordinary granite plates,the precision version focuses more on flatness,surface finish,and dimensional stability.After CNC precision cutting,multi-stage fine grinding,and manual lapping by professional technicians,it achieves extremely high flatness tolerance—000 grade(the highest precision level)can reach micron-level accuracy,with surface roughness(Ra)≤0.015μm.The natural aging of granite over hundreds of millions of years eliminates internal stress,ensuring no deformation even after long-term use,which is the key to maintaining its high precision.

This plate possesses excellent inherent properties:non-magnetic,which avoids interference with precision measuring instruments;corrosion-resistant to acids,alkalis,and oil stains,suitable for various harsh industrial environments;low linear thermal expansion coefficient,minimizing dimensional drift caused by ambient temperature changes.Its high Mohs hardness(6-7)ensures strong wear resistance,maintaining a smooth reference surface for a long time.

Widely used in aerospace component inspection,semiconductor wafer measurement,optical instrument calibration,mold precision verification,and laboratory research,the Precision Granite Surface Plate is available in customizable sizes and precision grades(000,00,0,1)to meet different high-precision application needs.It only requires simple daily maintenance—wiping with a clean,lint-free cloth to remove dust and debris,ensuring its precision is always at the optimal level.