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help me measure it, how would u dimension it

hi all
i got a measuring/construction/engineer/noob problem.
i have this small 40 degree, 2 degree conical thing, that is supposed to have a diameter 6.86mm where it is as smallest, and its supposed to be centered in the casted hole(D), and perpendicular to the plane(A)
i dont know how to measure it, since its a very small surface, and its also not cylindrical, its conical with a 2degree angle.
so i have to measure it as a cone. and then construct a circle using cone feature, but the results are very unsure.

the matching part has the exact same feature, except its internal, and it should run free over the tap thingy.
how can i measure it
or how would u else dimension it, so that the matching part fits.
ty all, thanks for ur feedback

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  • @anyone else

    ok but the center wouldnt change if i keyed in the wrong diameter, no? since the centerpoint is static.
    wether i key in10mm or 5mm, the centerpoint would remain the same. So the position of the small arc circle and the big boy hole would be the same even if i used wrong nominal diameter. Its only the distance from center to the vectorpoint that would be wrong.

    true?
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  • @anyone else

    ok but the center wouldnt change if i keyed in the wrong diameter, no? since the centerpoint is static.
    wether i key in10mm or 5mm, the centerpoint would remain the same. So the position of the small arc circle and the big boy hole would be the same even if i used wrong nominal diameter. Its only the distance from center to the vectorpoint that would be wrong.

    true?
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