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The Fowler Dial Bore Gauge Set has gradient spacing of 0.0005" and the insulated grip offers extra stability while taking measurements. The gauge utilizes a two-point contact system to detect geometry problems such as ovality and taper, and carbide-tipped contact points offer extended wear and improved abrasion resistance.
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.
The Fred V. Fowler Company manufactures inspection and measurement instruments such as electronic indicators, calipers, bore gages, and digital scales. The company, founded in 1946, is headquartered in Newton, MA.
Chris london
Reviewed in the United States on December 25, 2022
Like everything
Ronald Nickels
Reviewed in the United States on November 30, 2022
missing the one to the left of the 4" no.11... and the no1-2.0" on the right side and at the top of the box the .12" and .08" and .04" and .02" spacers...kits show them in there on the page of the one i bought
andy
Reviewed in the United States on February 17, 2017
Great buy
Customer
Reviewed in the United States on September 1, 2011
The tool is overall accurate, but the metal reference marks had fallen off the dial indicator by the time I got it, and don't stay in place too well. The plastic guard for the dial indicator doesn't fit too well and is cheaply made. The handle is not too well indexed to the body, and the machine work is kind of lackadaisical with more tool marks than necessary and rougher surface finishes than should be for a precision tool. Overall, this is not up to the standards of the old Starrett I use to use, but considering it was only 1/3rd the price, it is probably worth the cost for occasional use.
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