I have trouble understanding the F-G, H-I profile definition under the FCF.
What I know is that either the all around circle or a "between" or "from-to" arrow can be used. However this "common datum" style designator is confusing to me.
And the features being controlled are edges, and a radius...
The "ball groove" that runs parallel to the cylinder axis. I'm guessing it's either an internal grooving tool or might be a spherical undercut mill.
I was wondering which one would lead to cheaper parts and overall better performance.
Hi there!
I'm wondering how they are manufacturing the groove inside the square socket of hand tools?
I'm familiar with the through hole versions and their dimensions (https://www.engineersedge.com/hardware/square-drive-tools.htm), but I haven't found anything on the groove sizes and methods...
Running products aren't updated automatically, different versions are used parallelly.
The dwg carries the revision notes, and it's stated in the title block that a 'number up' is a revision or a version up. Like the picture.
https://www.tec-ease.com/gdt-tips-view.php?q=109
I found this on the subject. Interesting read, it helped me understand with visual examples. (I'm a picture book guy [roll1] )
We keep everything under the parent Mechanical Part. We don't "rename" them when major changes occur. It's essential in PLM.
I once started a new prototype development, made the parts etc, did some upgrading and had 3 revisions. Then my colleage joined the project and he put his ideas to use...
We use Siemens TeamCenter and we utilize a dual revision system for part numbers.
At the initial release the part number (for this example lets say PLABCDEFGH) gets its first version and revision.
The PN will be PLABCDEFGH-01-00
01 is the VERSION
00 is the REVISION
When something is changed...
The key in the text is the "location of the envelope".
For MME it's INSIDE, for AME it's OUTSIDE.
If the feature is at LMC then the LMC IS the UMME.
If it's at MMC then the MMC=UAME.
It is imperative to know that in thread connections, the first 3-4 full turns take up 99% of the force applied. Additional turns henceforth are unneccessary.
For a usual threaded hole the minimum depth must take into account the length of the thread starting spiral then an additional few turns...
However:
1.4.2 Cross-Reference of Standards
Cross-reference of standards in text with or without a
date following the standard designator shall be interpreted
as follows:
(a) Reference to other ASME Y14 standards in the text
without a date following the standard designator indicates
that the...
1.3 REFERENCE TO THIS STANDARD
When engineering documentation is based on this
Standard, this fact shall be noted on the documentation
or in a referenced separate document. References to this
Standard shall include the designation of ASME Y14.5-
2018.
It is mandatory to include the version. Not...
.02 isn't rocket science the 80s probably.
I would definitely make an unexpected visit to their shop if they're handing back parts with 7 times worse tolerances...
.005" is only 0.127 mm. I wouldn't call that *precision machining*. Anything below 0.05 (~ .00196 in) is what I call precision requirement.
We require 0.02 regularly which isn't a big deal at all.
At least they dimensioned a physical edge. At my previous company where we designed molding rings the foreign drafters usually made drawings like these:
(it is made up now, but you get the picture) Tolerance and position on a theoretical intersection.
