measuring theoretical point in space

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  • measuring theoretical point in space


    I am measuring a round angled gear, which I need to find a theoretical point of 2 lines.
    I created 2 lines by taking by taking to points in the groove of the part 180 degrees apart.
    Then create a intersection point from the 2 lines.
    I started the program measuring a plane on which the part is sitting on.
    I am not feeling very confident. of the result.
    I welcome any suggestions.

    Thank you in advance.
    Last edited by jim the; 12-28-2019, 11:29 AM.

  • #2
    I would say that is a very poorly drawn print. You have a basic dimension as a length to an intersect point but no indication of what the angle is supposed to be our how the distance is defined, The only datum I see on that print is the minor diameter as A?. In essence though, you need a line on each face at the same height on each fact and construct an intersect point from those lines. This would be the basis of your 1.875 basic. Remember, as a basic it has no +/- tolerance applied. It must fit into a datum structure that is not defined. I think you need to contact engineering and have them look into this before you can determine with any accuracy whether the basic falls within requirements. Hope this helps.


    • #3
      I'm with Jim Poehler on this, but what I do believe is those 2 intersecting lines are the center line of the Radii, Maybe make 2 opposing Cylinders, construct a line from each one and then see if you get a closer number, But technically that Basic number should be a Ref number, should appear like (1.8750) I think those 2 lines are the same as this angle.

      (In Memory of my Loving wife, "Ronda" who I lost March 7, 2016. I love you baby.)
      They say "Nobody's Perfect." I must be Nobody.


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