车制单件或小量生产零件的內孔,尤其是孔径较大时,在一般没有专用的极限塞规或大的內径千分尺的情况下,我们常用內卡钳摆动法,来测量孔的实际直径或孔与轴的配合间隙,如果內卡钳两脚张开尺寸是d,用来测量孔径时,卡钳的一个脚在孔中某一点固定不 The inner hole of a single piece or a small number of production parts of a car, especially when the diameter of a hole is large, is generally measured by the inner caliper swinging method in the absence of a special limit gauge or a large inner diameter micrometer Diameter or hole with the axis of the gap, if the calipers feet open size is d, used to measure the aperture, a caliper in the hole at a fixed point