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  1. frank2014

    4 hole pattern and interference boss relationship using gd&t

    @3DDave, thanks for the feedback. My plan was to have the surface the threaded holes and internal boss are located to be Datum A, and then the internal boss to be Datum B. the internal boss would have a positional tolerance of dia 3mm and a refinement perpendicular tolerance of 0.2mm. The 4...
  2. frank2014

    4 hole pattern and interference boss relationship using gd&t

    hello, it is my first thread so be gentle. I believe my design example is simple to understand. Part A is a flat plate and 4 threaded holes with a square bolt pattern that is centered over a internal dia boss. the mating part, Part B, consists of 4 clearance holes (same hole pattern) and an...

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