The Fork-centre, shown in Fig. 6, is used in the live-spindle to make the work revolve, one end of the wood being driven on the fork-centre by a mallet, and then the Cup-centre, shown in Fig. 7, is brought against the other end. The cup-centre is held in the spindle of the tail-stock, and, in common with the cone-centre, is spoken of as the dead-centre. The cone-centre is used when metal is being turned. They are both shown in Fig. 7.

Fig. 6.

Fig. 7.