NPT thread class why ?

[Anonymous]

Correct me if I'm wrong When I select hole note with a (i.e. 1/8 npt created with thread command) in a idw I get 1/8-27 -2A. I don't think NPT has a thread class, and if it does should be reading 2B for inside thread
and the excel spread sheet does not have a class written on so why is it showing up.
Jim C

[Anonymous]

What Inventor version? We could run a test. Thanks.

shekar

[Anonymous]

Same BS here.

Inv11 SP2

wrote in message news:5339711@discussion.autodesk.com...
Correct me if I'm wrong When I select hole note with a (i.e. 1/8 npt created
with thread command) in a idw I get 1/8-27 -2A. I don't think NPT has a
thread class, and if it does should be reading 2B for inside thread
and the excel spread sheet does not have a class written on so why is it
showing up.
Jim C

[Anonymous]

IV 11sp1

[Anonymous]

Thanks for bringing this to our attention. This occurrence has been logged
as issue #831940.

Regards,
Dan Szymanski
Inventor QA
Autodesk, Inc.

[Anonymous]

Any fix for the bug yet?

[mcgyvr]

Just go modify the threads.xls file for inventor.
You can make it say whatever you want.

[Anonymous]

This is fixed in our internal builds. Unsure when users can have this. Thanks.

shekar

[kstate92]

ANSI B1.20.3-1976 - Dryseal Pipe Threads (Inch)

Page 3, section 1.3, subsection1.3.1: "Two classes of NPTF threads have been established: Class 1 and Class 2. Class 1 signifiies that specific inspection of root and crest truncation is not required, while class 2 signifies that such is required."

"In cases where class is not denoted, the thread shall be considered Class 1."

This applies to the Dryseal type, where the F stands for Fuel. This style was meant to seal on their thread crests and roots without the need for sealant (HA!!!). I don't have the much older plain USA (American) pipe thread spec.