Acme Threads

[Tony Wells]

I rarely use the compound method of feeding into the thread, and have no complaints. I get acceptable results based on the theory that the support given by cutting on both sides of the tool prevents any pushoff . I don't use HSS tooling for threading, so perhaps I would take a different approach, but I've had no problems using the straight in method. I cut UN, Acme, Stub Acme, and a few API tapered threads, and once in a long while, a square thread or a buttress, two of my least favorite threads. Oh, and an occasional Metric thread. And some weird specials like double lead and threads that are proprietary. I normally cut to factory gages.