Granite Straight Edge
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Precision Granite Square Ruler Set with Aluminum Case
In ultra-precision manufacturing, even a tiny angular deviation can lead to serious alignment errors. A reliable reference square is therefore essential.
ZHHIMG® granite square rulers are manufactured from high-density ZHHIMG® black granite (≈3100 kg/m³) and carefully hand-lapped by experienced technicians to achieve extremely precise right-angle geometry.
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Granite Straight Ruler
In semiconductor and high-tech manufacturing, dimensional accuracy is specified not in millimeters, but in micrometers—and increasingly in nanometers. During critical processes such as photolithography, wafer defect inspection, and ultra-precision assembly, even sub-micron mechanical deformation of metrology components can induce significant process drift, yield loss, or device failure.
The ZHHIMG granite straight edge is engineered to serve as a stable, thermally invariant, and geometrically traceable primary reference standard—establishing an unambiguous baseline for precision alignment and measurement.
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Precision Granite Inspection Plate
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ISO9001 / ISO45001 / ISO14001 Certified
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CE Compliant
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20+ International Patents & Trademarks
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100-ton single-piece machining capacity
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20m maximum machining length
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Temperature & humidity controlled grinding workshop
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Laser interferometer verification
We do not compromise on material.
We do not compromise on flatness.
We do not compromise on integrity.Precision manufacturing cannot tolerate shortcuts.
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Ceramic Straight Edge
Granite straightedges are widely employed in precision mechanical systems and semiconductor manufacturing equipment as high-stability reference standards. Their exceptional dimensional stability, low coefficient of thermal expansion, and superior vibration-damping characteristics make them indispensable for critical alignment, leveling, and geometric calibration tasks during equipment installation, commissioning, and periodic verification.
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Precision Granite Straight Edge
Primary Reference Tool for Ultra-Precision Alignment & Measurement
The ZHHIMG® Precision Granite Straight Edge is a high-accuracy measuring and reference tool designed for straightness inspection, alignment, and precision assembly in metrology-grade environments. Manufactured from proprietary ZHHIMG® high-density black granite, this straight edge delivers exceptional dimensional stability, long-term accuracy, and repeatable performance far beyond conventional metal straight edges.
Engineered and finished to international metrology standards, it is an indispensable tool for precision equipment assembly, machine calibration, and quality inspection.
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Granite Straight Edge
The granite straight edge is a high-precision metrological instrument widely employed in mechanical manufacturing, precision instrumentation, and metrology laboratories to verify the straightness of workpieces and machine tool guideways.
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Precision Granite Straight Edge
Metrology-Grade Reference Tool for Straightness & Alignment Inspection
The ZHHIMG® Precision Granite Straight Edge is a high-accuracy metrology instrument designed for straightness inspection, precision alignment, and equipment calibration. Manufactured from proprietary ZHHIMG® high-density black granite, it provides exceptional dimensional stability, wear resistance, and long-term accuracy, making it an essential reference tool in precision engineering and metrology laboratories.
This granite straight edge is widely used wherever micron-level straightness control is required, including machine installation, guideway inspection, and high-precision assembly processes.
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Precision Granite Straight Edge
Ultra-Stable Reference Tool for High-Accuracy Alignment & Metrology
The ZHHIMG® Precision Granite Straight Edge is a high-accuracy metrology reference tool designed for precision alignment, straightness inspection, and equipment assembly. Manufactured from proprietary ZHHIMG® high-density black granite, it delivers exceptional dimensional stability, long-term accuracy, and vibration damping that cannot be achieved with metal or marble alternatives.
Engineered for professional metrology environments, this granite straight edge is widely used in machine tool calibration, linear guide installation, CMM alignment, and precision equipment assembly, where micron-level accuracy is critical.
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ZHHIMG® Ultra-Precision Granite Straight Edge
In the world of ultra-precision metrology, “close enough” is never enough. At ZHONGHUI Group (ZHHIMG), we understand that the foundation of high-end manufacturing lies in the absolute truth of a straight line. Our ZHHIMG® Granite Straight Edges are engineered to be that ultimate reference point, providing unparalleled stability and accuracy for the world’s most demanding industries.
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Granite Straight Edge-Granite Measuring
The granite straight edge is an industrial measuring tool made of natural granite as the raw material through precision processing. Its core purpose is to serve as a reference component for straightness and flatness detection, and it is widely used in fields such as mechanical processing, instrument calibration, and mold manufacturing to verify the linear accuracy of workpieces or act as a reference benchmark for installation and commissioning.
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Granite Measuring Tools
Our granite straightedge is made from high-quality black granite with excellent stability, hardness, and wear resistance. Ideal for inspecting the flatness and straightness of machine parts, surface plates, and mechanical components in precision workshops and metrology labs.
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Granite Straight Ruler H Type
Granite Straight Ruler is used for measuring flatness when assemble rails or ball screws on the precision machine.
This granite straight ruler H type is made by black Jinan Granite, with nice physical properties.