Ditto on getting a GOOD die! The cheap ones are really awful. For brass, especially, you need a good, SHARP die to get the best threads.
Also think about making yourself a tailstock die holder. I made one out of a piece of aluminum 2" dia. x about 4" long. drill a 1/2" hole down the middle, machine a 13/16" dia. counterbore in one end, a 1" counterbore in the other end, so 13/16" and 1' dies fit loosely, drill/tap for a setscrew at each end to hold the die.
Round off the sharp corners, do a light knurl on the outside for gripping.
To use, put about a 5" length of drill rod in your tailstock chuck, slide the die holder (with die inserted onto it. Start up your lathe in slowest backgear with the work in the chuck, grab on, and slide the die along the drill rod and onto the work. You can cut up to about a 1/4-20 thread just holding the die holder by hand.
And you don't need to reverse the die. Just keep going. There is plenty of chip clearance in a die, unlike with a tap.
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