NEED G76 FOR INTERNAL 1" 11-1/2 NPT

[BAD DOG]

no one in our shop can agree on the exact G76 numbers for an internal 1" 11-1/2 npt thread.

Fanuc 18i control on Daewoo 240 MSB turning center

please help

BAD DOG

[extanker59]

I've never seen a group of machinists agree on the exact numbers to use on NPT single point threading. There was a discussion a few months ago about this topic and there seems to be an agreement that you should pick a standard set of numbers for your shop and stick with them. Really, as long as the angle is right and the gage fits, it is up to you.

[teamus]

How do you figure the x and z dimension in a G76 execution line for NPT threads?

I know the thread depth is .8/tpi but do you subtract that from the od low limit

for the x dimension?

teamus