Perpendicularity of an axis

[TomDougherty]

Hi, this probably has a super simple answer but I haven't been able to find concrete information on it.

I have a cylindrical part which has a hole that does not go completely through the part (see attached)(I am talking about the larger hole that is dimensioned). I need that hole to be perpendicular to the bottom face of the part (labeled datum A). The tolerance there is just a place holder for now. So for perpendicularity in this case would the tolerance zone be only the depth of the hole (left picture) or the entire length until it reaches datum A (right picture)?

Or maybe a better way to say it is what would be the length of the axis used in the tolerance zone? Only the depth of the hole or the entire axis until the datum? If it is only the depth of the feature then this gives a larger possible deviation in terms of angularity as opposed to the second option.

Thanks in Advance!

 

[Burunduk]

Speaking of the projected tolerance zone option, how would one know the direction of projection; from the top face up or from the inner end face downward into the smaller hole, when the feature control frame is under the diameter dimension as shown in OP's image?

Y14.5-2018 addresses the case of a model at the end of 6.4.7: "In a model, the projection direction is established as being on the side of the part where the tolerance
specification leader terminates on the part."
Why only in a model?
And what if the FCF is attached to a dimension and aligned with a dimension line, and not leader directed to the feature?

 

[cr7]

Just want to remind you, add the symbol to make that tolerance zone diametral.

 

[Woosang]

This makes me interesting because some months ago I had a talk with my friend about the exact same issue.
One preferred using the Projected Tolerance Zone symbol as 3DDave suggested, the other one preferred using the BETWEEN symbol, that is, A <-> B, with A is the intersection of the centerline and the top face, and B is the intersection of the centerline and the bottom face.

In this thread, there is an argument whether the Projected Tolerance symbol conforms to the Standard. How do you think about using the BETWEEN symbol in this case?

 

[greenimi]

.......the other one preferred using the BETWEEN symbol, that is, A <-> B, with A is the intersection of the centerline and the top face, and B is the intersection of the centerline and the bottom face.

.... How do you think about using the BETWEEN symbol in this case?

Between points shall be points identifiable on the features, not imaginary ones such as centerline's intersection.

 

[Woosang]

Between points shall be points identifiable on the features, not imaginary ones such as centerline's intersection.

ISO 1101:2017, para 9.1.4 says "If the toleranced feature is a derived feature, the intersection with a feature can be identified as a limit of the derived feature"

While ASME defines a feature as a "physical portion of a part", ISO defines many different types of features and a derived feature can also be toleranced, so in this case the points on a centerline may be designated extremities when indicating BETWEEN symbol.

However, in ASME a derived feature can not be specifically toleranced so the points on a centerline may not be designated extremities.
But I am still not sure. ASME does not allow indicating a tolerance to the axis or centerplane but it also supports tolerance interpretation of the axis or centerplane of feature of size...
Is there anyone who would argue that points on a centerline may be designated points with Between symbol?