螺纹千分尺被广泛地用于机械加工螺纹工件的生产中。该千分尺所配备的测头中,其锥型测头的锥端小圆直径尺寸d和v型测头的v槽宽度尺寸B,是螺纹千分尺的主要技术参数之一。尺寸d和尺寸B的设计,必须按照螺纹标准对螺纹牙型和尺寸的具体规定和要求,才能保证该千分尺测量结果的正确性。当螺纹标准经过重大修改,重新颁布后,千分尺测头的这两个参数也必须相应地修订,这样,才能保障螺纹标 Thread micrometers are widely used in the machining of threaded workpieces. The micrometer equipped with the probe, the cone-shaped probe tip diameter of the small diameter d and v-type probe v groove width size B, is one of the main technical parameters of the screw micrometer. Size d and size B design, thread specifications must be based on the thread profile and size of the specific requirements and requirements, in order to ensure the accuracy of the micrometer measurement results. When the thread standard is subject to major changes, re-enacted, the two parameters of the micrometer probe must be revised accordingly, so as to protect the thread standard