Center the piece of material to be cut into the spindle and tighten it down firmly. Move the tailstock into position to support the other end of the material.
Insert a left-hand cutting bit into the tool holder. These are obtained at hardware stores, online or any shop that specializes in lathe equipment. The tool holder is mounted onto the compound rest.
Set the compound to an angle of 29 degrees. Use the guide on the lathe or use a protractor to achieve this angle.
Reverse the leadscrew direction so that the compound and therefore the threading pass moves from left to right when the lathe is turned on.
Turn the lathe on and position the cutting tool at the end of the piece of material to be cut. If the application warrants it, begin the cut with a taper. It may require several passes to cut the threads, depending on how deep you need them to be.