Measurement Of An Internal Thread Pitch Diameter - Easson EX-100 Manual

Fig.17 3-pin measuring for thread pitch diameter
5.2.7 Measurement of an internal thread pitch diameter (Fig.18)
For measuring an internal pitch diameter, the used method is a relative measurement. The
standard sample is combined of a pair of measuring block with standard tooth type and a
block gauge. The measuring principle is shown as Fig.16. The mathematical model is:
Fig.11 An example for using single V-shaped rack
d = E - P/2 Ctg( /2)+(a + b)
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