Marble Measuring Tools
Marble measuring tools are precision-machined from high-quality granite for high stability and resistance to deformation. Products include right-angle blocks, squares and reference blocks in various sizes. Embedded copper bushings facilitate mounting and fastening. These tools commonly act as reference components in precision inspection and equipment assembly, providing high-precision references for metrology. Natural granite is aged for an extended period to release internal stress before grinding and lapping. Its high hardness and low thermal expansion coefficient minimize the effects of temperature changes and resist warping. Workpieces are machined to metrology-grade accuracy with extremely small flatness and perpendicularity errors. Brass inserts in mounting holes prevent the stone from chipping during assembly and allow secure bolted fastening. Products include right-angle reference blocks, square reference blocks and elongated reference blocks, widely used in machine tool calibration, fixture positioning, laboratory metrology and precision equipment commissioning. Unlike steel measuring tools, they resist rust and maintain stable measuring accuracy over long periods.
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