I am moving on to inside thread cutting.

[magicniner]

For internal right hand threads I cut away from the headstock using a left hand cutter with the lathe in reverse.
Cutting a single groove at full depth first provides a convenient start for threading passes and a neat end to the thread, best of all you can cut at the rated feeds, speeds and DOC for your cutter.

 

[BtoVin83]

In cutting pins and boxes in drill pipe we could not cut relief grooves. My opinion is to develop the skills so the relief is not needed so that in case a job comes along where you cannot cut a relief it's no big deal. Come up with a visual cue that works for you, o-ring, tape whatever. If you never stretch you mindset progress is slow in coming.

 

[epanzella]

I use a 2 inch dial indicator for boring or internal threading. The sweep of the dial allows me to anticipate the end of the cut. If I machine to a shoulder on a part that doesn't allow a relief groove, I shut off the lathe about 50 thou before the end zone and it will coast to about .015 from the
shoulder. I thread the rest of the way by hand.

 

[magicniner]

If a groove cut with the threading tip is not acceptable at the end of a thread I do something related but not the same, I still cut away but I use the DRO, by positioning the cutter just a little deeper than the start point then hand winding to the start point before engaging any cut depth.
I then apply the cut depth for the pass and engage the clutch, I haven't chipped an insert yet with this method and again it's about the only way to use carbide at the recommended speeds.