Symbol Identification Question
Symbol Identification Question
(OP)
I tried searching but when you don't know what to call thing thing you're searching for, it's hard to find results.
This FCF is attached to a plain hole perpendicular to a flat surface, thru the entire body, with the exit surface parallel to the entry surface. Basically the hole is as simple as geometry gets. Datum A is a plane parallel to the surface the hole penetrates. Datums B & C are holes parallel to the hole-in-question and in the same body.
What I can not identify, however, is what this symbol under the FCF is. My best guess is that it denotes perpendicularity to Datum A, since A happens to be a surface perpendicular to the hole axis. However that doesn't come with any tolerance, unless it's implied some other way I'm ignorant of.
To what spec would this symbol be identified, and what is it?
Drawing is noted to be IAW ASME Y14.100-2004, Dim & Tol per ASME Y14.5-1994.
Image linked and attached

Thank you
This FCF is attached to a plain hole perpendicular to a flat surface, thru the entire body, with the exit surface parallel to the entry surface. Basically the hole is as simple as geometry gets. Datum A is a plane parallel to the surface the hole penetrates. Datums B & C are holes parallel to the hole-in-question and in the same body.
What I can not identify, however, is what this symbol under the FCF is. My best guess is that it denotes perpendicularity to Datum A, since A happens to be a surface perpendicular to the hole axis. However that doesn't come with any tolerance, unless it's implied some other way I'm ignorant of.
To what spec would this symbol be identified, and what is it?
Drawing is noted to be IAW ASME Y14.100-2004, Dim & Tol per ASME Y14.5-1994.
Image linked and attached

Thank you
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5





RE: Symbol Identification Question
My best guess would be the same as yours. Perhaps the intent of this symbol is to clarify that the position callout - in addition to acting as location control - also controls perpendicularity to datum plane A.
If that is, by any chance, true, the perpendicularity tolerance is dia. .0050 as defined in the feature control frame.
Side note:
B-C as secondary, and C as tertiary datum reference? That looks at least suspect.
RE: Symbol Identification Question
Thank you for the response. I was afraid I missed some elementary symbolism.
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Symbol Identification Question
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Symbol Identification Question
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Symbol Identification Question
Chris, CSWA
SolidWorks 14
SolidWorks Legion
RE: Symbol Identification Question
Take a look around the dwg (usually sheet 1) for a Drill Code Table.
The table would have:
The symbol, hole size, color code.
Normally used on a drill jig tool with multiple holes of different sizes, I.E. "A" .375 Dia color Red, "B" .500 Dia color Green, etc.
Harold G. Morgan
CATIA, QA, CNC & CMM Programmer
RE: Symbol Identification Question
Ding ding ding!
This is a Boeing job, and I have not come across this one yet. We have some screenshots and clips of drawings to do an RFQ on a real rush job (and yep, it's a DJ) so I do not have the notes and tables that are likely on sheet 1. This is the first time I've seen this method. For all the other DJs requiring color coding, we've been required to mechanically engrave the drill code and fill it with paint of a specified color.
Always something new with Boeing work - I love it... usually. :)
Thank you very much.
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Symbol Identification Question
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5