General Note will give Tolerance for Hole Location Dimension?
General Note will give Tolerance for Hole Location Dimension?
(OP)
Hello,
This is my first question after my registration. I found this site
when I am searching answer for my question.
My question
1. General tolerance (UNLESS OTHERWISE SPECIFIED ALL EDGES AND SURFACES PROFILE TOLERANCE 3 DATUM A, B and C) will give tolerance to hole locating dimension. For the hole size tolerance shown, but no position tolerance feature control frame.
This is my first question after my registration. I found this site
when I am searching answer for my question.
My question
1. General tolerance (UNLESS OTHERWISE SPECIFIED ALL EDGES AND SURFACES PROFILE TOLERANCE 3 DATUM A, B and C) will give tolerance to hole locating dimension. For the hole size tolerance shown, but no position tolerance feature control frame.





RE: General Note will give Tolerance for Hole Location Dimension?
So if you have a default profile tolerance that does control the holes.
With classic size & position call out they tell you where the center needs to be (with a tol) and how far the edge can move from that.
Profile is specifying directly where the 'edges' can be.
Note, this doesn't mean that default note is necessarily a good idea or the correct control for all holes but yes, it does cover them.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: General Note will give Tolerance for Hole Location Dimension?
But if the size tolerance shown for the hole. when the general tolerance covers the location of hole then it will also cover size of the hole.Then there will be conflict between size tolerance and profile tolerance?
correct me if am wrong..!
RE: General Note will give Tolerance for Hole Location Dimension?
Yes, you have a problem.
Either size & position is covered by the profile tolerance or else you are correct - if separate size tolerance is provided for holes then you'll need to have position tol too.
While I think it's been debated on here before, my understanding is you can't combine direct size tolerance and profile tolerance.
What drawing standards are you working to out of interest.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: General Note will give Tolerance for Hole Location Dimension?
My drawing standards based on ASME. Do you have example(images or pdf's) to show that this not possible. I know about this, but unable to convince my counterparts.
RE: General Note will give Tolerance for Hole Location Dimension?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: General Note will give Tolerance for Hole Location Dimension?
Whether this was the intent on the OP's drawing is another question entirely.
Evan Janeshewski
Axymetrix Quality Engineering Inc.
www.axymetrix.ca
RE: General Note will give Tolerance for Hole Location Dimension?
A question:
What would define size (not width) of profile tolerance zone if dimension for hole diameter was directly toleranced - let's say dia. 9.9-10.4? Would you like to use additional basic dimension just for defining size of profile tolerance zone?
RE: General Note will give Tolerance for Hole Location Dimension?
Why? Because profile on a hole is an all-around thing, so it naturally controls the size and shape of the hole (and orientation and location, usually, with datum references). The ASME standard does mention that profile tolerances must be applied to a "true profile" and by definition a true profile is one with basic dimension for its shape.
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems