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NPT in metric drawings

D

Driehaus

New member
Gurus,

I'm looking for a workaround for any thread in inch shown in metric drawings, dimensioning with shown dim e.g. NPT 1/2" or at least 1/2"
Dual dimensioning is not allowed,
@ONPT 1/2" is not allowed,
@S works only for one dimension. If you have different threads you need different symbols, driven by hand ... not allowed.

It has to be parametric, any clue? Ho do you do that?
 
Driehaus,


The only suggestion i can give (since you want a parametric solution) is to create an inch assembly. Once created insert your metric part then create a bolt hole in the assembly. When you display the dimension itwill be in inches!


Omar
Edited by: omarhernandez
 
not necessary to create an inch part to show inch thread. Just use the thread callout function

Screenshot is is from a metric part with both a metric and imperial pipe thread



The fun part is creating the hole table.


DB
 
@DB
Thank you.
I'm aware of the note and I'm using it the way you have shown.
My (very special) question is how to show it in a dimension.

The real problem is the machining. Some of the machinists are not familar with the non-metric threads (fairly rare used in Germany). Therefore X-sections with dimensioned thread are the best way to avoid errors, but I have to use only parametric dim's.

TIA Uwe
 
Driehaus,


I think its impossibe to do what you want to do in the same part. You did choose a metric template as your start part. The only way is to take to a higher level....an assembly. Did you try the suggestion I gave you?


Omar
Edited by: omarhernandez
 
Omar,

thank you for your recommendation. It will show the main diameter of the threat in inch. But at the drawing I need the standard name e.g. NPT 1/2" and not the real diameter, similar to the 3D pic from DB

All,
what am I missing? I'm always in metrical drawings, almost DIN / ISO, rarely using thread for pipes, and the typical machinist also.

How do you dimension imperial threads on your drawings?

TIA Uwe
 
If you want to show the information for the thread as Dell_Boy on the drawing, select the Show/Erase and select Note (icon with an arrow and ABCD) then select the thread.
 
He is tying to show an NPT thread size note. I am on WF2.0, as far as I know NPT thread sizes must be created manually? Does anyone know what release if any has NPT thread sizes?


Omar
Edited by: omarhernandez
 
I believe what Dell_Boy has done is created a *.hol file for the thread he has shown. As far as I know the only *.hol tables that are installed with WF2 and WF3 are the ISO, UNC, and UNF.It looks like the NPT,NPTF, and ISO_7 thread hole tables were released with WF4. You can create a hole chart for the thread you want and specify how you want the thread information to be formated. I haven't actualy created a hole chart but I found the information for creating one and formatting the thread note in the Help by searching for hole tables inPart Modeling using a global search.
 
kdem is right NPT is not available in WF2 and WF3.This isonly present in WF4 and NPTtype is used to create tapared pipe threads and holes. Dell_boy has created a *.hole file or just modified the ISO.hol file by adding the inch type hole. Actually you can create an NPT.hol file so that during hole creation you can select an NPT type hole besides ISO,UNC and UNF in WF2 and WF3.





as you can see in the image, this was done using WF2, i created a NPT.hol file to show an NPT type hole with inch sign.



Edited by: jaypogi
 
Dell boy did create a BSP hole table from scratch as NPT is not the default pipe thread standard in many parts of the world.

Hint: to save your self time creating an NPT hole tables, copy the one out of WF4 and change the format and values to make it compatible with the version of Pro/E you are using.


DB
 
Can anyone post an wf4 npt hole table? I don't really know much about hole tables, which sucks when I have to look up a npt in a book and make it from scatch. Thanks for the suggestion DB


Omar
 
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