Threading on Lathe - University of Florida
2019-3-25 · 3 Wire Method . The three wire method uses basic geometry and three identically sized wire rods to allow the pitch diameter to be calculated using any standard micrometer measurement. The three wire method is very accurate and the cheapest method of measuring a variety of thread pitch diameters. The downside to this method is that it requires a lot of dexterity to make an accurate measurement without dropping the precision thread wires. Figure 7a: Checking thread size using 3 wire method.
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