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用普通的具有两个平行测量面的量具(如卡尺、千分尺等,无法直接测量具有奇数齿的刀具及零件的外径.有一种专用的千分尺,它把普通千分尺的砧座改为两个对称于测微螺杆中心并构成V型的测量砧座,测量时,两个砧座的测量面分别与被测零件两相邻齿的齿顶接触,而测微螺杆的测量面则与这两齿所对的另一齿顶接触.由于零件的齿在
It is not possible to directly measure the outside diameter of knives and parts with odd teeth using normal gauges with two parallel measuring surfaces such as calipers, micrometers, etc. There is a special micrometer which changes the anvil of a common micrometer to two symmetrical The center of the micrometer screw and constitute a V-shaped measuring anvil, measuring, the two anvil’s measuring surface and the measured part of the adjacent tooth tips of two adjacent teeth, and measuring micrometer screw measurement surface and the two teeth The other tooth toe contact is due to the teeth of the part