The shaft is mainly used to support the rotating parts, transfer torque, and ensure that the rotating parts have a certain rotation accuracy and interchangeability(Because of mass production, there is part interchangeability, and because there is interchangeability production, tolerance system is developed. In the assembly and replacement without auxiliary processing and repair, it can well meet the requirements of use and production). So, how to measure the size of shaft parts?
    Shaft detection method:
    1Medium and low precision axis - vernier caliper, outer diameter micrometer, etc., for absolute measurement;

    2High-precision axial - vertical optical meter, mechanical comparator, gas momentum meter.

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