Height Gauge
SPT Metrology supplies high-precision Height Gauges designed for accurate vertical measurement, layout marking, and...
GRANITE STRAIGHT EDGE
High-Precision Reference Tool for Flatness, Alignment & Machine Calibration
Product Overview
As a trusted Granite Straight Edge Manufacturer, SPT Metrology manufactures premium Granite Straight Edges designed for high-accuracy inspection, machine alignment, flatness verification, and geometric measurement across industrial, laboratory, and tool-room environments. Made from high-quality, naturally seasoned black granite, our straight edges offer exceptional dimensional stability, corrosion resistance, and long-term accuracy, making them an ideal replacement for traditional cast iron straight edges in precision metrology applications.
Each granite straight edge is precision-lapped to IS: 7327-2003 standards, ensuring excellent straightness, flatness, and parallelism throughout its length. Granite’s inherent advantages—non-magnetic nature, low thermal expansion, and high wear resistance—make it a superior material for reference tools exposed to continuous measuring tasks. Unlike cast iron, granite does not rust, warp, or develop burrs, allowing highly repeatable results even in demanding workshop conditions.
SPT Metrology granite straight edges are used for checking the straightness of machine guideways, alignment of mechanical assemblies, flatness of inspection surfaces, and geometric accuracy of manufactured components. Their low weight relative to cast iron makes them easier to handle while still offering the rigidity and precision required for advanced inspection tasks. These straight edges are available in various profiles—including rectangular, triangular, and parallel forms—to suit a range of industrial applications.
Each straight edge is manufactured using advanced lapping processes and undergoes stringent inspection to ensure strict compliance with accuracy grades. The smooth, finely finished reference surfaces enable sensitive instruments such as feeler gauges, dial indicators, electronic levels, and slip gauges to deliver accurate and repeatable readings.
SPT Metrology provides straight edges in standard lengths as well as custom sizes to meet specific machine tool alignment requirements. Optional metal inserts or lifting handles can be added for ease of use without affecting the reference surfaces.
Choose SPT Metrology Granite Straight Edges for long-lasting accuracy, superior durability, and world-class performance in alignment and flatness inspection tasks—engineered to deliver reliability for every precision measurement.
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