1. Find a round steel, in the front end of a hole fixed wire, clamped in the ordinary lathe, top top.
2. Clamp a piece of square steel on the tool holder and make a hole in the center to pass the wire.
3. The spring steel wire from the square steel hole through the front end stuck in the round steel hole.
4. The spindle is put at the lowest speed, and the walking knife is put at the spring pitch.
5. Close the opening and closing nuts, drive the car and coil.
6. After a certain length, stop the car and cut the wire.
7. Exit the top, remove the coiled spring from the slot on the round steel.