Wrap the center in a cloth to prevent it from being scratched or damaged during removal.
Insert the knockout bar into the hole on the headstock spindle. Push the knockout bar through the headstock spindle. Use this removal technique with a live or rotating center.
Turn the hand wheel on the tailstock to retract the spindle into the tailstock. The screw will push the center out of the spindle. Use this removal technique with a dead or stationary center.