The location of the upper surface of the snap ring (green arrow)is less important than the width of the opening (red arrows).
A profile of surface within .020 back to a datum reference frame is added to green surface and a ± width of the slot within .005 is added for size.
The checker sent this...
If in Fig 4-53/ ASME Y14.5- 2009 basic radii R40.5 is changed to basic diameter Ø81 (from radius to diameter), does this modification alter in any way the meaning of the drawing or more precise the feature definition?
Or on the same token, in Fig 4-29, datum feature B is defined with R15...
Question regarding ASME Y14.5-1994 or 2009.
Feature of size 100 ±.005
Circular runout within .002 to a datum axis.
How tall a bump is acceptable in the surface with the runout control?
How would you read and interpret the question: bump size to be measured within the same circular section...
I am able to calculate the minimum wall thickness specified on question #6, but I am not able to get the “correct” answer from the book.
Anyone, would be interested to get their GD&T and math skills sharpened?
I can post my answer: 6.1655.
Book’s answer is 5.6083, but I do not understand...
One end of a part is hexagonal—left end: called datum feature A, dimensioned with basic angle, basic size across the flats, basic size across opposite corners and an all-around datumless profile.
The opposite end: right end: profile all around to A primary. (same as the left end: everything...
If a tapered wedge IS defined with ± angle and direct toleranced dimension on one end, can its middle plane be used as a datum feature?
How to generate the centerplane / middle plane as a datum from the non-parallel but planar adjacent surfaces?
Details: A part has its left and right sides...
ASME Y14.5-2009/ page 15
1.8.2 states: Where the center of a radius is not dimensionally located, the center shall not be indicated.
Fig 1-30 ASME Y14.5-2009
Why the center of the radii are indicated?
Aren't they shown by the two small crosses?
I have seen this question posted on different site and it is a great interest of mine too:
How to make the transition to MBD smoother: tips and tricks.
Or otherwise stated how to qualify an existing 3D CAD model for the MBD process?
Redraw? Start from scratch?
Measure/Qualify the existing...
Hole is used as a secondary datum feature (B) in the assembly:
I was told that using position to control only the orientation of the hole is a nay-nay in ASME 2009.
The the question becomes how to control its location?
A-primary= a flat surface
B=secondary datum feature. Should be only...
I got the following question today:
ASME Y14.5-2009
Regular feature of size (pin) dimensioned as follows:
Case1: Ø.125±.003 (OD size dimension)
Case 2: basic diameter .125, and profile within .006
Can you indicate or imagine a scenario/case (how the pin should look like) that can be...
Relatively new working with GD&T and on this forum.
ASME Y14.5-2009
Does the total runout (as a lonely requirement) shown control the surface location?
Again, the surface LOCATION, not the axis location (coaxiality).
Or the surface location is controlled by the combination between the...
An “adjusted” (positional tolerance-wise Ø3mm instead of 0 at LMC) picture from ASME standard. (7-17/2009)
Question: What would be X min. and X MAX. for the case shown?
http://files.engineering.com/getfile.aspx?folder=2d9e75d4-82a0-432c-a143-ff8695cbc1cf&file=LMB.JPG
One of our QE claims that in order to get the “correct” datum displacement when parts are measured on the CMM the secondary datum feature (B) is to be measured twice.
Details: Parts similar with 7-24 or 7-26/ 2009
On the initial base alignment, A primary datum feature and B secondary are...
Calculate the minimum wall thickness
When both features (considered features and datum feature) are at RFS, do we need to include both form errors in the stackup calculation?
Cylindrical part with a thru hole
Dimensions in mm
ID: 20 ± 0.5—datum feature A
OD: 50 ±1.3, position Ø3 (RFS) to A...
Does anyone knows what is the difference between outer tangential and minimum circumscribed/maximum inscribed cylinder algorithms on a CMM?
In other words if a hole is scanned/measured for size and two different algorithms are used to report the size (outer tangential AND maximum inscribed...
Authors:
Al Neumann
Scott Neumann
Technical Consultants Inc.
New ASME Y14.5 - 2009 Standards for GD&T article.
Machine Design Magazine
The use of direct-tolerancing methods, limit dimensioning, and plus-minus tolerancing are used to control the size of features only. The limits of size, Rule...
Is the surface interpretation taking precedence over the axis interpretation for features of size with no modifiers in the positional callout?
In other words, a hole positional callout RFS, does it have two interpretations, surface versus axis. So, if the actual surface of the hole does not...
Is circular runout controlling:
1.) Straightness of the cylinder surface?
2.) What about Derived Median Line (DML)?
Same questions for total runout:
Is total runout controlling:
3.) Straightness of the cylinder surface?
4.) What about Derived Median Line (DML)?
In other words, if a...
I do not have access to ISO GPS standards (I have only ASME), but I would like to ask one of you, if there is any difference between the definition of runout in ASME versus definition of runout in ISO?
The runout is verified on one of our inspection equipment based on ISO 1101, but the print is...
