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 Pitch diameter whitworth?
Pitch diameter whitworth calculator uses Pitch Diameter of Whitworth = Micrometer Reading of Whitworth-3.16568*Wire Diameter of Whitworth+0.96049*Screw Pitch of Whitworth to calculate the Pitch Diameter of Whitworth, The Pitch diameter whitworth formula is defined as the diameter where the thread thickness is equal to the space between the threads. Pitch Diameter of Whitworth is denoted by Dww symbol.
How to calculate Pitch diameter whitworth using this online calculator? To use this online calculator for Pitch diameter whitworth, enter Micrometer Reading of Whitworth (Mww), Wire Diameter of Whitworth (Gww) & Screw Pitch of Whitworth (Pww) and hit the calculate button. Here is how the Pitch diameter whitworth calculation can be explained with given input values -> 7092.259 = 0.008-3.16568*0.0012+0.96049*0.00301.