Do I double the result?
Do I double the result?
(OP)
The axis of one hole, which is the datum, to another hole.
The feature control frame says 0.1 to [-A-],[-B-],[-E-]. A 42.5 Basic leads from diameter A-E to the perpendicular center axsis of the other hole.
For purposes of capability studies does the 0.1 mean the entire tolerance zone? And if that is the case should the delta between the true center and the datum be doubled.
The feature control frame says 0.1 to [-A-],[-B-],[-E-]. A 42.5 Basic leads from diameter A-E to the perpendicular center axsis of the other hole.
For purposes of capability studies does the 0.1 mean the entire tolerance zone? And if that is the case should the delta between the true center and the datum be doubled.





RE: Do I double the result?
No, Delta does not double.
The datum hole is located exactly in its correct position, by definition. The second hole is located with respect to the datum hole. The 0.1 value is a diameter around the nominal position of the second hole.
By the way, the hole is the datum, not the axis. ASME Y14.5M-1994 does not allow you to apply datums to axes.
I hope that helps.
JHG
RE: Do I double the result?
RE: Do I double the result?
One day all parts will be made this way.
RE: Do I double the result?
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP3.1 / PDMWorks 05
ctopher's home site (updated 06-21-05)
FAQ559-1100
FAQ559-716
RE: Do I double the result?
RE: Do I double the result?
You're doing a capability on a position? Seems a little odd as that won't show if the position is deviated to the plus or minus of the Basic Dim.
RE: Do I double the result?