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Thread: Plastic Products GD&T

  1. #1
    Associate Engineer
    Join Date
    Aug 2015
    Posts
    1

    Plastic Products GD&T

    Hello Everyone,


    Can GD&T be applied to Plastic products since it has curved profiles and no flat surface to create datum reference. if yes can you tell how it is done

    Thank you

  2. #2
    Senior Engineer
    Join Date
    Jan 2014
    Posts
    58

    My Two Cents

    The way I used to handle arbitrary curves is to supply a CAD file with the desired curve to which the GDT tolerances applied. This was covered in a note on the drawing. Later on we supplied the whole CAD model and the drawing only conveyed the tolerances with the note specifying that the model was the controlling document for dimensions. I've been retired for a couple of years now and I'll bet these day for molded parts the CAD file is always the controlling document.

    Timelord

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