About the use of the plug gauge:    

    1First predict the diameter of the measured hole, find out the plug gauge closest to the diameter of the measured hole, and try to insert the measured hole.
    2If it can be inserted, then insert the plug gauge of a large size into the test assembly until the plug gauge cannot be inserted, the plug gauge of the smaller size of the plug gauge value, that is, the aperture of this hole.
    3If it cannot be inserted, then insert a smaller gauge plug into the test assembly until it can fit a plug gauge, the gauge value is the diameter of the measured hole.

    As a precision parts size pneumatic measurement equipment manufacturer, we have19+Years design experience engineer, can provide a variety of measurement solutions, the production of pneumatic probe using German imported steel, to ensure the real material, through the original salt bath heat treatment, high temperature1500°Quench, wear proof, liquid nitrogen-180°Deep cooling to remove internal stress, prevent deformation, manual grinding, ensure micron accuracy.