NPT In Feature Parameters

[bbylls]

Using NX8.5
When I use Feature parameters for a screw hole it gives me say "1/4-20 (depth).50"
But when I use it for a tapered NPT thread, I get "1/8-(depth).39"
Is it possible to get 1/8 NPT-(depth).39 ?

 

[JohnRBaker]

I don't have any problem getting the NPT designation using NX 8.5 and the Feature Parameter function, as shown below, however the thread/inch is meaningless when specifying pipe threads:

Now starting with NX 9.0, the new Hole Callout function did a much better job:

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[bbylls]

Thanks John.
Have to investigate why it's not working for me.

 

[gelsonnicoletto]

Search for the file "thd_english.dat"
They have the standards for threads like that: In the first column you have the text for the thread

# American Pipe Threads - Standard Taper
# Data from Machinery's Handbook (25th Edition, 1996) Table #3 - pp 1774-1775
# ----------------------------------------------------------------------------
# Name Major Minor Pitch Tap Drill Pipe Depth
# Dia. Dia. Dia. Dia.
# (internal (equal to
# threads) major dia.)
# (in) (in) (in) (in) (in) (in)
# ----------------------------------------------------------------------------

1/16-NPT 0.3125 0.2416 0.0370 0.2559 0.3125 0.5906
1/8-NPT 0.4050 0.3339 0.0370 0.3346 0.4050 0.5906
1/4-NPT 0.5400 0.4329 0.0556 0.4626 0.5400 0.7874
3/8-NPT 0.6750 0.5676 0.0556 0.5906 0.6750 0.8268
1/2-NPT 0.8400 0.7013 0.0714 0.7480 0.8400 0.8268



Gelson Z. Nicoletto
Eng. Supervisor
Mould Desing
Brazil