In order to correctly judge the measurement results, when selecting the gauge structure and type, the workpiece structure, size, output and inspection efficiency must be considered.

    According to the national standard recommendation, when measuring holes, the following types of gauges can be used: full plug gauge, sheet plug gauge, incomplete plug gauge, spherical rod gauge; When measuring the shaft, the following types of gauges can be used: ring gauge, snap gauge. The types of gauges and their range of application are shown below.

The type of gauge and its application range

Common type of plug gauge

Common types of snap gauge

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