|Mechanical Design, Manufacturing and Engineering Forum|
] [ Search
] [ Engineering
and Design Database ] [ Resume/Job
Database ] [ Product
and Services Directory ]
[ Engineering, Design and Drafting Store ] [ Engineering Forum ] [ DFM DFA Training and Trainers ] [ GD&T Training GD&T Trainers ] [ Advertise ]
|[ POSTING POLICY / RULES ][ Archive#1 ] [ Archive #2 ] [ Archive #3] [ Calculators ] [ Tell A Friend ]|
|Forum Moderators: randykimball, Administrator|
|NPT thread problem|
Posted by: eddyhtmok ® |
Author Profile Mail author Edit
Here is the situation that I am facing.
I have three NPT tapered tubing. The factory manufacture them and checked "pass" with NPT gauge. However, one have sent them to laboratory to check the thread dimension of them using CMM and found that the thread is out of tolerance.
That made me confused on which result should be trusted.
The following is the dimension and data after checking by CMM.
(1)3/4 - 14 NPT +Tol -Tol Actual Size Result
(1)1-11 1/2 NPT +Tol -Tol Actual Size Result
Please extend your help on this. We still did not know whether the tolerance provided by the laboratory is correct or not. They are refering the tolerance spec. from ANSI/NCSL Z540-1 & ISO 10012-1.
|Post Reply | Recommend | Alert|
Powered by Engineers Edge
© Copyright 2000 - 2018, by Engineers Edge, LLC All rights reserved. Disclaimer