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Mitutoyo 468-988 Digimatic Holtest LCD Inside Micrometer, Complete Unit Set, 1-2"/25.4-50.8mm Range, 0.00005" Graduation, +/-0.00015" Accuracy (3 Piece Set)
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About Mitutoyo 468-988 Digimatic Holtest LCD Inside
The Mitutoyo 468-987 Holtest three-point internal micrometer has a measurement range of 0.5 to 1.0” and 12.7 to 25.4 mm, is titanium nitride (TiN)-coated, precise to 0.00005” or 0.001 mm, and accurate to + or - 0.00015”. TiN-coated measuring contact points offer increased durability and impact resistance over uncoated points, and contact point geometry allows the instrument to measure to the bottom of a blind hole. The ratchet stop offers constant force for repeatability. The micrometer has functions for presetting, zero/ABS (Absolute), auto power on/off, data hold, data output, error alarm, and a battery replacement alarm. Estimated battery life is eight months, under normal use. This gage set includes three complete display units, two setting rings, and fitted wooden case. Includes inspection certificate ensuring that the exact micrometer purchased has met National Institute of Standards and Technology master standards. Bore gages 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 gages are typically calibrated with a setting ring. Bore gages come in two types, one simple, and the other direct-measuring. Simple bore gages are used with a caliper to transfer the hole measurement, while the more complex gages take the measurement directly, and display the measurement through a vernier, dial, or digital display. Bore gages have a two- or three-point contact, which indicates how many points on the gage head touch the inside of the bore. Two-point contacts are better at measuring ovality, while three-point systems are used to measure lobing, or triangular form error. Pistol-grip bore gages are used for fast, single-handed operation with good repeatability from one operator to another. Bore gages, regardless of type, can be used in some special applications, such as measuring threads, spline pitch diameters, an
