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help me measure it, how would u dimension it

pcdmisstudent
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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  • @any one else

    this got me curious about how the fixed rad /small arc method acctually works.
    firstly using fixed rad on a surface gets u a more accurate center position since it kinda tries to fit a radius guage to the surface (?)
    and since u have an accurate center position (Which u later orgin in) you can accuratly measure individual points using PRAD (its basically just a distance from center to the vector point)
    but now lets say i key in wrong diameter in the fixedrad circle, lets say 10mm instead of 5mm
    the distance (PRAD) from the center point to the vector point will be much longer than acctual, because pcdmis thinks its 5mm from the vector point instead of 2.5mm
    am i on the right track to understand this? or no?
    (im still just a student)
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  • @any one else

    this got me curious about how the fixed rad /small arc method acctually works.
    firstly using fixed rad on a surface gets u a more accurate center position since it kinda tries to fit a radius guage to the surface (?)
    and since u have an accurate center position (Which u later orgin in) you can accuratly measure individual points using PRAD (its basically just a distance from center to the vector point)
    but now lets say i key in wrong diameter in the fixedrad circle, lets say 10mm instead of 5mm
    the distance (PRAD) from the center point to the vector point will be much longer than acctual, because pcdmis thinks its 5mm from the vector point instead of 2.5mm
    am i on the right track to understand this? or no?
    (im still just a student)
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