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  1. canty

    Cutoff of relationship between surface finish and fatigue strength?

    All, Thanks for the responses. After more searching, I can't seem to find the whatever original resource it was that led me to this line of thought. BrianE22, I found a similar (but not quite like) the plot you were describing in my Machine Design book. In response to some of the other...
  2. canty

    Cutoff of relationship between surface finish and fatigue strength?

    I think it is fair to say that there is a well established relationship between the quality of the surface finish and the fatigue strength of a part. A smoother surface has fewer points in which a crack can begin to propogate and affect the fatigue life of the part. Unfortunately, this general...
  3. canty

    Program/System to manage Dependent Documents

    Wow, what a great discussion! Thanks, all, for your input. I should clarify that while my degree is aerospace, I work for an OEM of control valves and the work that I do is more mechanical in nature. As I tried to allude to in my original post, I admit that the error is human in nature. However...
  4. canty

    Program/System to manage Dependent Documents

    Does anyone know of, or use, some program or system of keeping track of documents that either depend on other documents or are interdependent? The background - I currently work for a mid-size company that is working their way through some rather difficult and complicated projects. Currently...
  5. canty

    Position of threaded hole on B16.34 boss

    I'm trying to tolerance the position of a 3/4" NPT hole on a boss. B16.34 Fig. 4 states that the nominal boss dia. is 1.75 inches. However, I have no clue how much the hole can move around on the boss surface. Certainly, it can't be right next to the edge of the boss, but I don't really have any...

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