内径百分表是测量孔类零件的通用量具,大批生产也离不开它,如何正确安装使用很重要。我在实践中是这样做的:一是百分表在不测量时始终处在弹簧不受拉伸(压缩)的状态下,指针停在原始位置。长时间不用也不用拆开放着,防止了各零件的变形,避免指针不灵不归位的毛病。二是将活动测量头和可换测量头在无压缩状态下固定在基本尺寸加0.50mm长度内,用游标卡尺测量。将百分表置于刚好与活动杆接触或离开0.10mm之内固定。把百分表固定在基本尺寸上, Internal diameter dial indicator is a common measure of hole parts, mass production can not be separated from it, how to properly install and use is very important. In practice, I did this: First, the pointer is always in its original position when the spring is not stretched (compressed) when it is not measuring. For a long time do not have to open apart, to prevent the deformation of the parts, to avoid the pointer does not work does not shift the problems. Second, the activity measuring head and the exchangeable measuring head in the uncompressed state is fixed in the basic size plus 0.50mm length, measured with a vernier caliper. Place the dial indicator just in contact with the movable rod or within 0.10mm away from it. The dial indicator fixed on the basic size,