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Derive an expression for Two wire method in screw thread measurement?

Subject:- Metrology and Quality Engineering

Topic:- Screw Thread measurement

Difficulty:- High

1 Answer
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Two wire method:-

The effective diameter can not be measured directly but can be calculated from the measurements made. Wires of exactly known diameters are chosen such that they contact the flanks at their straight portions. If the size of the wire is such it contacts the flanks at the …

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