Fig. 289. Oilstone Slip.

Fig. 290. Parting Tool.

The parting tool, shown in Fig. 290 and in use in Figs. 106, 110, and 122, is for cutting deep recesses or for cutting pieces in two. Its work is always rough, consequently its use is limited. It cuts rapidly, but always roughly, and therefore saves no time, except when the surface being cut is not required to be smooth.

It should be held with the point or cutting edge directed towards the line of the lathe centers. Usually it should be made to cut a space wider than itself by being moved a little from side to side.