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  1. Dawg2012

    The term ALL AROUND

    @looslib That's a nice refinement on para 3.3.19 in 2009 adding the clause 'or other specification'. We are using 2009 presently but that will be handy once we switch. The question remains - would you be required to use that symbol on a chamfer dimension on a round hole in an orthogonal section...
  2. Dawg2012

    The term ALL AROUND

    That seems to speak to the tolerance specifically, not the dimension. There may be a similar implication for a dimension - that it defines the size of a 'feature'... and if that feature continues along a tangent edges it's still considered one feature.
  3. Dawg2012

    The term ALL AROUND

    Hello all, I am looking to defend NOT using the "ALL AROUND" term (not the symbol) for a chamfer call out on a round hole in a section view. The follow up to that would be for a chamfer on a slotted hole. I've always thought any non-broken feature (like a chamfer on a slot) would not require...
  4. Dawg2012

    Clarify correct usage of the Dimension Origin symbol

    Sounds good! Thank you all for your replies and your patience.
  5. Dawg2012

    Clarify correct usage of the Dimension Origin symbol

    We currently work to 14.5-2009.
  6. Dawg2012

    Clarify correct usage of the Dimension Origin symbol

    It's pretty clearly tied to the datum. See attachment (if it worked, haven't done this before). It sounds like it's not wrong though, even if it is clearly tied to the datum? If that's the case I'll likely use it for clarity (and to keep the...
  7. Dawg2012

    Clarify correct usage of the Dimension Origin symbol

    I have a situation where I am being asking to add a dimension origin symbol to a dimension specifying the height of a dowel pin protruding from a surface, and that surface is a datum. I don't think this is right, as dimensioning from a datum should set that surface as the origin for that...
  8. Dawg2012

    Positional Tolerancing 101 (or maybe even 001)

    The specific application I currently have is an interface with four fasteners and two locating pins going into a close tolerance hole and slot. The pins allow the interface to be taken apart and put back together with very repeatable locational precision. One part has four clearance holes and...
  9. Dawg2012

    Positional Tolerancing 101 (or maybe even 001)

    I have reason to really understand the Fixed Fastener positional tolerancing formula given in Appendix B of 14.5. The formula itself is pretty straight forward, as is the interchangeability concept, but what about the nominal relationship of one part to the other? It would appear, after...
  10. Dawg2012

    Profile with no datums

    Woof! (Thanks)
  11. Dawg2012

    Profile with no datums

    Okay. Thanks. To take this understanding one step further - if the surface in question was NOT parallel to A, and other dimensions were required to locate it, say a basic angle from A and a basic dimension from, say, the datum B hole, then I would reference A and B in the FCF? If so it would...
  12. Dawg2012

    Profile with no datums

    I've spent the better part of two days trying to understand these seemingly subtle differences in surface profile tolerancing. Glad to find this forum! Seems a lot of practical knowledge here. My situation is a block similar to that described above - however I have two holes in datum surface A...

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