What is the use of Three wire method ?
The accurate measurement of thread pitch diameter, which may be perfect as to form and lead, presents certain difficulties which result in some uncertainty as to its true value. The adoption of a standard uniform practice in making such measurements is, therefore, desirable in order to reduce such uncertainty of measurement to a minimum. The “three – wire method” of measuring thread pitch diameter, has been found to be the most generally satisfactory method when properly carried out, and is recommended for universal use in the direct measurement of thread plug and thread setting plug gauges.
How to Calculate Micrometer measurement per reading?
Micrometer measurement per reading calculator uses Micrometer Reading Unified and National Thread = Pitch Diameter of Unified Nation Thread+3*Wire Diameter of Unified Nation Thread-0.86603*Screw Pitch of Unified Nation Thread to calculate the Micrometer Reading Unified and National Thread, The Micrometer measurement per reading formula is defined as the reading of an instrument which can measure thickness of very small objects. Micrometer Reading Unified and National Thread is denoted by Mun symbol.
How to calculate Micrometer measurement per reading using this online calculator? To use this online calculator for Micrometer measurement per reading, enter Pitch Diameter of Unified Nation Thread (Dun), Wire Diameter of Unified Nation Thread (Gun) & Screw Pitch of Unified Nation Thread (Pun) and hit the calculate button. Here is how the Micrometer measurement per reading calculation can be explained with given input values -> 8269.551 = 0.00698+3*0.00128-0.86603*0.00296.