The part above is finished complete from 1.000" Dia. 12L14 at 2100 RPM in 12 seconds.|
The tricky part of it though is the last full thread has to be less than 0.080" from the shoulder.
To compound the problem, the thread is produced toward the spindle (Single point threaded) in order to finish both I.D.'s.
So, what normally would be the last thread, from a manufacturing standpoint, is the first thread. The CMT830 is able to accelerate fast enough to be generating a full thread in less than one revolution, and is accurate enough to pick up on that same thread at exactly the same point every pass.