The Mitutoyo 568-469 Borematic Snap LCD Bore Gauge has a measurement range of 1.6 to 2.0" (40.64 to 50.8 mm) and is accurate to + or - 0.0003" (0.007 mm). Gradient spacing is 0.00005" (0.001 mm). This direct-measuring gauge has a built-in tolerance judgment function which allows GO/NO-GO judgment based on user-defined upper and lower limit settings. It has a 330-degree rotatable LCD and provides both inch and metric readings. The quick-action lever operation offers quick and error-free measurement reading. This gauge uses a three-point contact system for the detection of lobing or triangular form error, and TiN-coated contact points provide durability and impact resistance. This gauge can measure near the bottom of a blind hole and has SPC data output.Bore gauges measure holes, or bores, in a workpiece. They can measure the interior diameter of a hole at any depth, while internal micrometers can only measure to the depth of their teeth. Bore gauges are typically calibrated with a setting ring and come in two types: simple and direct-measuring. Simple bore gauges are used with a caliper to transfer the hole measurement, while the more complex gauges take the measurement directly, and display it through a vernier, dial, or digital display. Bore gauges have a two- or three-point contact, indicating how many points on the gauge head touch the inside of the bore. Two-point contacts are better at measuring ovality, while three-point contacts are used to measure lobing or triangular form error. Pistol-grip bore gauges are used for fast, single-handed operation with repeatable results from one operator to another. Bore gauges can also be used in special applications, such as measuring threads, spline pitch diameters, and deep bores.Mitutoyo manufactures precision measuring tools, metrology equipment, and related systems. The company, founded in Tokyo in 1934, formed Mitutoyo America Corporation in 1963 with headquarters in Aurora, IL.
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