As the length metrological instrument, The Length Measuring Machine is for direct and differential measurements, it is mainly used in metal-working industry, especially the inspection department of those industries of machine manufacturing, measuring tool and gauges together with measuring instruments. It is the high-technology product of the integration of the optics, mechanic and electricity and adopts the grating displaying technology, which has greatly improved the accuracy and efficiency. At the same time, it various accessories have improves the universal performance. Its measuring parts are as follows:
a. Smooth cylindrical workpieces such as axis, hole, gauge and ring gauge
b. The pitch diameter of internal and external thread, thread gauge and thread ring gauge
c. Workingpiece with parallel plane surface, such as measuring rod and lower grades gauge.