Calculation examples
Estimate of uncertainty for thread-measurement standards

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Calculation examples


Estimate of uncertainty for thread-measurement standards

Author : Georges-Pierre VAILLEAU

Publication date: December 10, 2007 | Lire en français

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9. Calculation examples

  • Example 1. Measurement of an M 64 × 6 threaded plug: uncertainty on the virtual flank diameter (table 7 )

    • Instruments and references used

      Length measuring bench, with flat keys, equipped with its own ruler.

      Smooth reference pad with a diameter of 50 mm.

      Set of three smooth pins with a diameter of w = 3.205 mm.

    • Measurement method

      Measurement of the diameter on plugs by direct comparison with the smooth reference plug. The diameter of the plugs w is known.

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