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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

Parents
  • As 2013 junkie said, This is a callout from the pitch diameter. I guess the best way to do it is with a thread have and the CMM.

    Also if anyone is interested about the Self Centering Thread Scan, I found out that it cannot be used unless you have a high end controller.
    I don't rember which ones they are.
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  • As 2013 junkie said, This is a callout from the pitch diameter. I guess the best way to do it is with a thread have and the CMM.

    Also if anyone is interested about the Self Centering Thread Scan, I found out that it cannot be used unless you have a high end controller.
    I don't rember which ones they are.
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