Proper GD&T callout for Pin at 75 Deg. to surface?
Proper GD&T callout for Pin at 75 Deg. to surface?
(OP)
What would the GD&T callout for a pin at 75 Deg. to a surface at the end of a round shaft be?
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Proper GD&T callout for Pin at 75 Deg. to surface?
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Proper GD&T callout for Pin at 75 Deg. to surface?Proper GD&T callout for Pin at 75 Deg. to surface?(OP)
What would the GD&T callout for a pin at 75 Deg. to a surface at the end of a round shaft be?
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RE: Proper GD&T callout for Pin at 75 Deg. to surface?
The result would could be stated in a feature control frame as 'pos tol dia.xxx relative to dia a and surf b.'
This assumes that there is no orientation required per your orig statement.
RE: Proper GD&T callout for Pin at 75 Deg. to surface?
One could also use positional tolerances if there is a requirement for the pin's location and angularity.
Hope this helps.
Dave D.
www.qmsi.ca
RE: Proper GD&T callout for Pin at 75 Deg. to surface?
RE: Proper GD&T callout for Pin at 75 Deg. to surface?
Your specification would depend massively on what you are trying to accomplish. I agree with the above comments about angle dimensions being basic. Plus/minus dimensions get increasingly meaningless as the geometry get complex. You need to define datums carefully, and think through your GD&T specifciations.
- Is the surface at the end of your shaft a critical feature, suitable as a datum, or should your pin be located 15° from the shaft OD?
- Is the angle critical, or is it the location of the pin or the outline of the pin?
- Are there any other orienting features on your shaft?
- How are you going to inspect it?
JHGRE: Proper GD&T callout for Pin at 75 Deg. to surface?
Love to see someone check circular or total runout to a flat surface - can't be done.
Both runouts require at least 2 cylindrical features sharing the same C/L and at least one feature is the datum.
Dave D.
www.qmsi.ca
RE: Proper GD&T callout for Pin at 75 Deg. to surface?
A picture here would be worth those thousand words.
I was envisioning a 75° conical tip on a pin.
You just conjoured a view of a cylinder with truncated end.
I just re-read the original post. Scratch the Runout.