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ThreadSpecs3 ™

ESP Web Site Overview Profiles UN/UNR/UNJ Metric Buttress Acme Tapered Pipe Gages

Using wires and balls to measure pitch diameter

It is customary to use wires and balls to measure pitch diameter of gages, not product threads. However, in this software, wire and ball specifications are displayed on the product dimension screen. They are calculated for the basic pitch diameter sizes, as applicable.

Normally, the best size wire or ball for symmetric threads (in this software, 60° and Acme threads) is the one that would contact the flanks at the pitch diameter if there were no lead angle. Buttress threads use different rules. For symmetric threads, this software provides two best size wires : one as just specified, the other one using the Vogel method. There are three ways to determine a wire "constant" :

Tips on using this software : wires and balls

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