Inside hole calipers, also known as internal calipers or bore calipers, are precision measuring tools used to measure the internal dimensions of cylindrical holes, bores, and cavities. These calipers are designed specifically for measuring the inside diameter of objects such as pipes, cylinders, and other internally machined or manufactured components.
Inside hole calipers typically consist of two arms or legs that are hinged at one end and have measuring tips at the other end. The measuring tips can be either flat or spherical, depending on the shape of the bore being measured. The arms are inserted into the hole to be measured, and the tips are expanded to make contact with the inner walls of the bore. The distance between the tips represents the diameter of the bore, which can be read directly from a scale on the caliper arms or transferred to a separate measuring instrument.
