Hole dimension setings

[linqur]

Is there a way to modify standard of dimesnions?
Change TRHU to THROUGH for example? Or DEPTH instead of depth "mark" which SW uses by default?

BR,
Linqur

 

[APPENG]

Well you can modify them manually if you so desire, or you can make use of the dimension favorites. Where you would create one manually, then save it as a favorite, and reference that style while dimensions in the future. You can modify a dimension in any way you wish, you can eliminate the symbols, add text...etc.

hope that helps

Regards,
Jon
jgbena@yahoo.com

 

[linqur]

It is too much work to change needed dimensions
or apply favourites to selected I am interested to change the standard so that it always comes as wished. The standards seem to be fixed? Also SW warns to brake parametric link when modifying dimesion text...

Linqur

 

[BBJT]

Same goes for the Cosmetic hole call-outs. This is the style that SW puts in for a Cosmetic Hole Call out....1/2-20 Tapped Hole[\b]. I have always used all caps in my detail drawings. I was under the usumption that caps was a drafting norm or standard. We also call out UNC or UNF. You may argue that that is being redundant but again I thought this was a drafting standard. Anybody have a ANSI standard manual that states how a threaded hole should be called out? If it shows the way SW calls them out I guess we will just have to get use to it. BBJT CSWP

 

[MadMango]

They are not called out as per the latest standard. Now the standard is:

.250-28 UNJF-3A
instead of
1/4-28 UNF-3A

UNC and UNF are "inactive" for new designs after 31DEC91. They should be replaced by UNJC and UNJF, per MIL-S-8879.

You can also reference the standard thread callout as:
.250-28 (1/4-28) UNJF-3A... but why bother. My company still does things the "old" way... 1/4-28 UNF-3A. = )

"Happy the Hare at morning for she is ignorant to the Hunter's waking thoughts."

 

[linqur]

All these standards look fine but lets assume for second that you would want to modify the standard...

Would you have some workaround or
modify hole note (breaking feature link) or
enter SPR?

Linqur

 

[Kenneth]

Question to MadMango:

"UNC and UNF are "inactive" for new designs after 31DEC91. They should be replaced by UNJC and UNJF, per MIL-S-8879."

Huh?

While the "J" thread form is the de facto aerospace "standard", UNF and UNC "Non-J" thread forms are alive and well, and not inactive for new design...

FYI, "J" and "non-J" threads should not be arbitrarily mixed, as it can result in interference at the thread root of the mating parts.

 

[BBJT]

I guess the whole point of my question was to inquire whether or not SW cosmetic thread hole callouts follow ANSI standards? If not should they? BBJT CSWP

 

[MadMango]

Kenneth, thanks for the clairification. I didn't have MIL-S-8879 so I wasn't sure what the "J" stood for (perhaps it was a bad example). My Global Engineering DMR didn't specify it was for aerospace only, hence the reasons for using quotes. Thanks again.

BBJT, I would have to say that SW does not dimension per standard, and (I have, sw99+) you should submit an Enhancement Request. The term "taped hole" is not even close to ASME Y14.5M, also, the leader is attached at a strange place.

Linqur, an easy work around is just to modify the text of your dimensions after. There aren't realy any links between dimensioned threaded holes and the model, at least none that I have noticed. Once I remember trying to change a course thread callout to a fine thread. I changed the drawing, but the model did not update.

Since I am reminded of this, me thinks it's time I doth submit again... "Happy the Hare at morning for she is ignorant to the Hunter's waking thoughts."

 

[linqur]

Thanks MadMango. I am really surprised to find out that
SW does not allow to modify [hole] dimension standard.
"Even" MDT allows that
I think that modifying all notes by hand and breaking the associativity of feature to drawing is "low-range" of SW.
SPR...

Linqur

 

[Kenneth]

Off subject...

Sorry MadMango, didn't mean to imply that the "J" thread form was unique or exclusive to aerospace, just that it is more-or-less the accepted "standard" for fatigue critical applications (which means many, if not most, applications) in the aerospace industry. The desire to avoid potential assembly of mixed "UN" and UNJ" thread forms; potential misuse of a "non-J" thread in a fatigue critical application, and stocking issues, has undoubtedly further driven the nearly ubiquitous specification/use of the "J" thread form in aerospace even for non-fatigue critical applications.

MIL-S-8879 can be found at

http://astimage.daps.dla.mil/docimages/0000\35\17\7373.PD5

. The document describes the modifications relative to the ANSI B1.1 "Non-J" thread form that comprise the thread "J" form (External Thread: An increased minor diameter with a mandatory, relatively large, dimensioned root radius tangent to the thread flanks; Internal Threads: Increased minor diameter to provided clearance to the modified external thread form). MIL-S-8879 only includes Class 3A and 3B threads.

 

[dogarila]

linqur, I agree with that it is surprising that SW doesn't allow customization in dimensioning. Different companies use different standards and there is no "one size fits all". In my case I had to write a VB program that you apply to selected dimension and then modify it as per our standard. It's like modifying it manually but eliminate the typing and keeps uniformity across drawings. In some cases unfortunately, we had to break the associativity.

Another question related to dimensioning. We use the ISO style dimensioning and the ordinate dimensions come with the "chain" turned on. Is there a way to have that turned off automatically? Or using API? I couldn't find a way to set it in the template.

Andrew