Conclusions
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1.
The difference in calculating the mean diameters according to [1] and from the suggested formula (1), with the new expression for the correction taken into consideration, amounts to 7μ.
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2.
When the mean diameter of tapering thread plug gauges with an asymmetrical profile threaded according to GOST 9909-70 are measured by means of the three-cylinder method with the well-known angular attachment, it is recommended to use for calculation purposes the expressions (1) and (2) which provide more precise results.
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Literature cited
N. M. Borzka and A. M. Chernyak, Izmeritel'. Tekh., No. 3 (1956).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 1, pp. 87–88, January, 1974.
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Akhanyanova, L.V. Measuring the mean diameter of tapering thread gauges with an asymmetrical profile. Meas Tech 17, 143–144 (1974). https://doi.org/10.1007/BF00835029
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DOI: https://doi.org/10.1007/BF00835029