This designation is given to the pattern-shop lathe for turning large work.

It embodies the same features as the small lathe, and is operated in the same way. Hand tools may be used for cutting, or a heavier tool may be clamped in the tool post which holds the bar of the hand-tool holder shown in Fig. 100.

Most large lathes are equipped with a movable tool carriage in place of the tool-rest holder, which moves by hand or by power feed along the lathe bed. The view in Fig. 100 shows the upper part of a carriage of a large lathe.

Fig. 100. - Tool Holder.