PIN FOR MEASURING TAP HOLE

摘要

PURPOSE: A tap hole measuring pin is provided to perform a three-dimensional measurement without forming a separate slot by inserting the tap hole measuring pin into a tap hole. CONSTITUTION: A tap hole measuring pin(200) has a bolt shape and includes a measurement section(210) and a coupling section(220). The coupling section(220) is formed with a male screw section, which is meshed with tapes formed in tap holes(110). The measurement section(210) has a cylindrical shape having a predetermined diameter. A diameter of the measurement section(210) is identical to a diameter of the tap holes(110). A probe of a measuring device makes contact with the measurement section(210) of the tap hole measuring pin(200) so that concentricity of the tap hole(110) is precisely measured. The tap hole measuring pin(200) is provided on a base plate(100) formed with the tap holes(110). Then, the tap hole measuring pin(200) is inserted into a predetermined tap hole to be measured.