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Discussion on the use of micrometer proofing rod
The main accessory of the micrometer is the proofing lever (hereinafter referred to as the measuring rod), which is an adjustment standard for the micrometer calibration zero (except 0 to 25mm micrometer). However, although the structure of the measuring rod is simple, the use of it still needs to be further explored. The author's views on this are as follows. 1. The error of the measuring rod is one of the main factors of the indication error of the micrometer. In actual use, the measuring rod is directly used as the adjusting standard to directly participate in the zero adjustment of the micrometer. The resulting zero error is