Abstract: The disclosure is of a grooved drum carrying an insulating strip, to which is secured a plurality of turns of an insulated wire wound helically on the drum. Inside the drum is mounted a longitudinal shaft which carries a series of spaced-apart cutting blades, and means are provided for moving the shaft by increments longitudinally to position the cutting blades behind different groups of wires. At each position, the knife assembly is rotated and the blades cut a group of spaced-apart wires which are joined together to provide a plurality of groups of wires.