screwcutting tools

[Stan]

Not much information t go on, but a couple of ideas. You could have drastic error on your thread bit angles and the two pieces should still screw together with a poor fit.

Are you sure both threads are right hand (or both left hand)? Are you sure the threads are deep enough? Did you have the correct minor diameter before you cut the internal thread?

Tell us more about what you did and what you got.

 

[Maryak]

RR17,

Please give us more info and pictures if possible.

Best Regards
Bob

 

[Tin Falcon]

RR17:
in machinig there are always little things that gan go wrong or are over looked.
As with any operation if you follow the basic steps you should get threads that screw together.
Are you using the fishtail gauge to set the tools up in the machine ?
How are you measuring the threads?
Tin