Correct Dies for threading black pipe
I use a model 300 pipe machine. I use a 611 head for the 1" - 2" and a Universal head for the 1/2" and 3/4"
I bought Ridgid Cat. No. 47765 for 1/2" - 3/4" NPT
Ridgid Cat. No. 47770 for 1" - 2" NPT.
I've threaded alot of pipe in my time, but never was the one who had to order and change dies, (UNTIL NOW).
When I thread a pipe, a fitting won't screw onto it. I under cut and the fitting still won't screw on. If I REALLY under-cut, the threads don't look right and the fitting is sloppy-fitting and the end of the pipe can fit in almost a quarter inch, before the fitting catches threads.
I will include a pic so you can maybe see the samething I am.
The pipe on the bottom is correctly threaded, the pipe above it is what I threaded. Notice two things: Doesn't it appear that there is more of a taper on the top pipe? Notice on the top pipe, how the dies dug into the pipe beyond the actual threads.
I need to set my dies up so that the indicator line is halfway between 1 1/2" and 1 1/4". I can see undercutting a little sometimes, but that's drastic, I think. -something isn't right. Anyone have any ideas? Do I have the right dies?