Seems I have had this problem with several 300 machines over the years, any suggestions? The threads I make seem to have less of a taper than factory threads, I set machine to have appx. 3 turns by hand into new C.I. fitting, pipe seems to start into fitting and starts to tighten, and then gets loose again, then buries too far into fitting before getting tight. I try setting threads shallower, but then I have trouble starting pipe into fitting and when tight, too many threads are showing, I like to see 3 or 4 threads on the outside of joint after tight. Machine has new Ridgid H.S. dies and new die carriage, What gives? It seems when I use factory nipples, they seem to have appx. 2 to 3 turns hand tight, but when I tighten, they seem to bottom correctly, 3 or 4 threads showing. also, how many turns by hand do others set their threads to? As a kid in the fab shop, we were taught 2.5 to 3.5 turns by hand for 1 to 2" pipe, 2" always got 3.5 turns.
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