The pitch of the measuring rod and gear in the dial indicator is 0 625 ke. When the tooth bar rises by 16 teeth (that is, it rises by 0 625×16= io mm). The 16-tooth pinion rotates once, and the large gear with 100 teeth also rotates once, which drives the pinion with 10 teeth and the long pointer to rotate 10 times. When the measuring rod moves 1mm, the long pointer makes one revolution. Since a total of 100 divisions are engraved on the dial, one division of the long pointer means that the measuring rod moves 0.01 mm. In order to improve the visual accuracy, a dial indicator can also be used, that is, one division of the long pointer means that the measuring rod moves 0.001 mm. , but generally used in occasions requiring very high measurement accuracy.
