Fowler 52-646-400-0 Extender Dial Bore Gage Kit, 1.4-6 Measuring Range

The Fowler Cylinder Dial Bore Gage, equipped with carbide-tipped anvils, offers a measurement range of 1.4 to 6 inches. This product is backed by a 1-year warranty from Fowler High Precision, a renowned American company founded in 1946 and headquartered in Newton, MA.

Bore gages are designed to measure the interior diameter of holes, or bores, in a workpiece. Unlike internal micrometers, which are limited to the depth of their contacts, bore gages can measure the diameter at any depth within their reach. Bore gages are typically calibrated using a setting ring and come in two types: simple and direct measuring.

Simple bore gauges require the use of a caliper to transfer the hole measurement, while the more complex direct measuring gauges provide the measurement directly, displayed through a vernier, dial, or digital screen. Bore gages feature a two- or three-point contact, indicating the number of points on the gage head that touch the inside of the bore. Two-point contacts are better suited for measuring ovality, while three-point contacts are used to detect lobing or triangular form errors.

Pistol-grip bore gages are particularly useful for fast, single-handed operation, ensuring repeatable results from one operator to another. These versatile tools can also be employed in specialized applications, such as measuring threads, spline pitch diameters, and deep bores.

The Fowler Cylinder Dial Bore Gage with carbide-tipped anvils offers accurate measurements with a dial indicator that has 0.0005-inch graduations and a measuring depth of 9.5 inches. This 1.4-6-inch range bore gage, featuring a two-point contact system, is designed for measuring hole diameters and detecting geometry abnormalities like ovality and taper. The carbide-tipped anvil contact points provide extended wear and improved abrasion resistance.

The bore gage is self-centering, allowing for fast and accurate measurements. For ease of use, the gage comes with an insulated grip and a chrome-plated handle. The set includes two self-centering measuring heads, an extension holder, spacers, and a fitted case, providing a comprehensive solution for a wide range of bore measurement applications.

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