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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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  • Ok, 6.86 isnt valid for the entire lenght, at the top its around 7.1, at the bottom 6.86. the gage diameter isnt speciefied at any lenght on the drawing, weirdly.
    ive talked with the engineeer and hes open for suggestions, he wouldnt know how to the dimension it. (which is why i also asked how u guys would dimension it to garantuee a fit with matching part)
    but anyway i just agreed we measure the diameter 2mm down from top face, then we measure it the same way on the matching part.
    but measuring it as a cone, gives really bad results for both, diameter, perpendicularity and concentricity, and it varies everytime i measure it. i guess its because the feature surface is too small for analys
    i know theres the FASTRAD algoritm for cirlces/cylinder which gives good results for small arcs, but is there no way to do this with a cone?
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  • Ok, 6.86 isnt valid for the entire lenght, at the top its around 7.1, at the bottom 6.86. the gage diameter isnt speciefied at any lenght on the drawing, weirdly.
    ive talked with the engineeer and hes open for suggestions, he wouldnt know how to the dimension it. (which is why i also asked how u guys would dimension it to garantuee a fit with matching part)
    but anyway i just agreed we measure the diameter 2mm down from top face, then we measure it the same way on the matching part.
    but measuring it as a cone, gives really bad results for both, diameter, perpendicularity and concentricity, and it varies everytime i measure it. i guess its because the feature surface is too small for analys
    i know theres the FASTRAD algoritm for cirlces/cylinder which gives good results for small arcs, but is there no way to do this with a cone?
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