i believe this to be a silly question but i'm no expert and thus i just want to verify if this is the same or valid interpretation.
There is a true position callout with a M modifier to datum A. i've always interpreted this where the feature (square slot) needs to be 'centered' to Datum A no...
Hi all,
When it comes to profile of surfaces i understand it to be a form and location tolerance of plus or minus half the value given.
The attached image reflects a profile of surface to datum a and b of .005 which i believe it gives tolerances of +/-.0025 for all BASIC dimensions called...
Hi all,
(Explanation of attached pdf: Top portion view of blueprint showing the datum's and area in question to those datum's, followed by images of a closer view of the questionable area plus my interpretation and finally on the 2nd page how i have been viewing it)
i have a blueprint with a...
Hi All,
This is a question more on measuring and wanted to get opinions on correct way to evaluate blueprint callout.
A small diameter is placed at the angle of 45° at the end of a diametrically shaped part. i have measured this on a CMM and found that the values to be with the +/-.010...
Hi all,
i'm confused, wonder if anyone can give me some guidance.
There is a straightness callout for an inner diameter 1.303/1.305 of .010 (see attached pdf). i'm uncertain how to calculate this properly: an external feature (ID will act as an external feature) or internal (since its an ID)...
Hi All,
Is it right or safe to just begin at an arbitrary point (based on basic point) that is marked at a specific distance and measure all other values based on this beginning point?
Attached i have a blueprint for the part and i just want to make sure that i start measuring the part...
We have been producing a particular part for many years now, maybe even before i was on board with the company. Well today i received an email indicating that we fill out a NOE (notice of escapement) based on a note that appears to be a flag-note but is not on the actual blueprint. (attached...
Hi All,
The first part of this question is very simple but i need guidance on this to make sure i understand the GD&T call-out.
Customer has a drawing in which they call out circular runout. Bare with me on the simplicity or stupidity of the questions but i want to make sure i'm on the...
Hi All,
Question relating to the concentricity call-out between the .3750 & .250 diameters. .3750 diameter called to be concentric to Datum D but when looking at the Datum D the datum is comprised of both diameters (.250/.3750?).
So i'm confused as to what .3750 needs to be concentric to...
Hi again,
i have a general question related a profile of surface callout on a blueprint that changes the boxed dimension depending on the part.
On the pdf there are 3 colored boxes, the top one is the BASIC dimension, followed by a regular toleranced dimension (+/-.010) & the bottom profile...
Hi all,
i have this blue print given by a customer and i wanted to confirm two aspects of the bp related to the true position of Datum B (inside the red box).
A) It calls the true position of diameter .280 to be in a diametrical zone of .010 to Datum A. However Datum A is the plane...
Hi all,
i just wanted to get a verification of what is being asked for in terms of the perpendicularity call out of a blue print.
My question is attached in the pdf (blue print images and examples from the Y14.5-1994).
In words though, there is a perpendicularity call out for the .220/.221...
Quick and hopefully simple question.
i attached a portion of the blue print of a part i'm looking over. The question i have relates to the true position of the 4 diameter holes which is based on a composite feature control frame.
Basically i'm trying to determine if the holes are good in...
Hi,
i have a question regarding the attached pdf.
i'm uncertain about the true position call out for Datum D. Datum D is a plane and has to be .010 to Datum B (.50 Ref) and Datum C (diameter). Is this asking for the size of the plane to be measured and i get the center point and make sure...
Hi all,
i was just glancing over another thread and i think it may relate but i just wanted to run this by you to see if this makes sense.
Attached is a blue print based on Y14.5-1994 which calls out datum C to have a straightness with .012, however datum C runs at least 16" in length.
My...
This is probably a simple question, i believe the standard (1994) explains it but i just wanted to verify with others who are more knowledgeable than me.
The attached pdf shows a part in which a 'profile of surface' of .020 to Datums A & B is called out, with all dimensions boxed in as Basic...
i believe i have this interpretation, but i wanted to run this by all of you just to make sure i'm on solid ground.
When i think of true position i think about the formula:
True Position = 2? Deviation in X² + Deviation in Y² and i think of this in terms of diametrical situations.
Per the...
i'm trying to research more on what "MISMATCH" stands for and what the number indicates.
On a forging drawing it notes: MISMATCH: .030 MAX. Talking with others the other day they indicated this would be considered a true position value.
Can someone point me in the right direction so...
Attached pdf is based on the Y14.5-1982. i just want to make sure that bonus is allowed in terms of the .256/.261 hole.
Datum G (Hole) has the regardless of feature size, which i understand to mean no bonus even when the hole is larger than MMC. But the FCF connected to the small holes, if...
Sorry for the simplicity of this question, but i have a few parts that need to be measured before we machine them.
i understand that datum targets are, "used to establish the datum points, axes and planes". So just for clarity, when i inspect a part (forging) can i just utilize the areas...
