Secure the black pipe horizontally in a pipe vice, with the pipe end 12 inches or so from the vise jaws. Clean the pipe end, using a rag.
Apply cutting oil around the last two inches of the black pipe, using a brush.
Push the die onto the end of the black pipe, so that the pipe end enters the hole in the center of the die. Turn the die clockwise 1/2 turn, while pushing the die against the pipe. Turn the die counterclockwise 1/4 turn, to help remove steel filings from the die threads. Turn the die another clockwise 1/2 turn, before turning it counterclockwise again 1/4 turn. Repeat this procedure several times until the pipe threads are nearly the width of the die (about two inches).
Remove the die from the pipe end by turning it counterclockwise. Wipe around the threaded pipe end with a rag, to free it of cutting oil and metal shavings.
Things You Will Need
- Pipe vise
- Cutting oil and brush
- When starting to thread the pipe with the die, make doubly sure that the die is at 90 degrees to the pipe end. This will ensure that the threads are cut straight on the pipe.