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 Sharp V?
Micrometer Measurement per Reading Sharp V calculator uses Micrometer Reading = Pitch Diameter+3*Wire Diameter-0.86603*Screw Pitch to calculate the Micrometer Reading, Micrometer Measurement per Reading Sharp V is the numerical value obtained from the micrometer when measuring over the three wires placed in the V-shaped thread groove. This measurement directly corresponds to the pitch diameter of the thread being evaluated. The wires are selected based on a calculated diameter that ensures accurate contact with the thread flanks, allowing for precise determination of the pitch diameter. Micrometer Reading is denoted by M symbol.
How to calculate Micrometer Measurement per Reading Sharp V using this online calculator? To use this online calculator for Micrometer Measurement per Reading Sharp V, enter Pitch Diameter (D), Wire Diameter (G) & Screw Pitch (P) and hit the calculate button. Here is how the Micrometer Measurement per Reading Sharp V calculation can be explained with given input values -> 8001.91 = 0.007+3*0.0012-0.86603*0.003.