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 Diameter of wire used Unified and national threads?
Diameter of wire used Unified and national threads calculator uses Wire Diameter of Unified Nation Thread = (Micrometer Reading Unified and National Thread-Pitch Diameter of Unified Nation Thread+0.86603*Screw Pitch of Unified Nation Thread)/3 to calculate the Wire Diameter of Unified Nation Thread, Diameter of wire used Unified and national threads formula is defined as diameter of measuring wires used in three wire method. Wire Diameter of Unified Nation Thread is denoted by Gun symbol.
How to calculate Diameter of wire used Unified and national threads using this online calculator? To use this online calculator for Diameter of wire used Unified and national threads, enter Micrometer Reading Unified and National Thread (Mun), Pitch Diameter of Unified Nation Thread (Dun) & Screw Pitch of Unified Nation Thread (Pun) and hit the calculate button. Here is how the Diameter of wire used Unified and national threads calculation can be explained with given input values -> 1280.15 = (0.00827-0.00698+0.86603*0.00296)/3.