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Concentricity of threads to -A-

FAMOUSX1
Hello All,
I am looking for some opinions on how to measure this callout.

I was thinking of scanning the thread with the appropriate pitch set in auto cylinder...

or

Maybe creating lines on the angles of the threads then creating a circle tangent to the 2 lines. Repeat this many times then create a circle or cylinder out of all those circles to create the PD. (If Possible)

I haven't tried this but it was just me thinking over the weekend of how I will go about this.
I'm not even sure I can create a circle or cylinder out of a bunch or circles radially.

TIA

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  • Also, you'll need to look at the form of the cylinder of the threads to make sure you're not hitting on the burrs and such, it's time consuming. From a manufacturing perspective, if both threads and datum A was machined at the same time then it's going to be concentric about 95% of the time. I would close the book on that and move on to the nextWink
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  • Also, you'll need to look at the form of the cylinder of the threads to make sure you're not hitting on the burrs and such, it's time consuming. From a manufacturing perspective, if both threads and datum A was machined at the same time then it's going to be concentric about 95% of the time. I would close the book on that and move on to the nextWink
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