公法线千分尺一般只用于测量齿轮公法线长度,现在们我将公法线千分尺用于测量短台阶外圆,增加了它的(?)量功能。当短台阶外圆公差等级在IT(?)以上,就不能使用外径千分尺了,因外径千分尺的微分简要碰到端面上,测出的数据也就不正确。如果使用游标卡尺,测量精度不够度,所以最好的方法是使用公法线千分尺,我厂在碰到这种精度较高的台阶外圆测量难题时,使 The common-law micrometer is generally only used to measure the normal length of the gear. Now, I use the common-law micrometer to measure the short-step external circle and increase its (?) Function. When the outer diameter of the short step is above IT (?), The OD micrometer can not be used. Because the differential of the outer diameter micrometer touches the end surface briefly, the measured data is incorrect. If you use the vernier caliper, the measurement accuracy is not enough, so the best way is to use the public normal micrometer, I plant encountered in this high precision cylindrical measurement problems, make