What's new
What's new

Taper thread and finishing adjustment

M Code

Aluminum
Joined
Apr 4, 2021
Hi

I don't have experience in taper thread. However, our shop may have API reg thread in the future I want to collect information to start prepare that.

in the normal thread, I am using G92 cycle with roughing and finishing, in finishing I will use X value offset in wear to keep extra stock for 1st article and use a ring gauge for finishing adjustment.


in the taper thread from the programming side it's clear to me I will use G92 cycle with R-value based on taper angle etc..

but from the process and finishing adjustment and process inspection for API reg

1- Do I use X value only for finishing adjusment or Z & X both?
2- I can't use ring gauge in this kind of thread since there is a seal area, so what is the reference in finishing adjustment .. is it the pitch diamtere beased on gauge point?

Thanks....
 

sinha

Stainless
Joined
Sep 25, 2010
Location
india
1. Use X only. Z will have the effect of shifting the threading helix.
2. Thread is normally measured based on pitch diameter only.

Try using G76.
 








 
Top