TOOLS USED IN MODEL ENGINE-MAKING. 9
a three-pronged fork at one end. This is held in the chuck with a set-screw, the fork can be driven tightly into a piece of wood before placing it in the lathe;the prongs grip the wood, when the movable head is screwed up tight, and cause it to revolve with the lathe (see Fig.3)
A drill-chuck is much the same as the last, having a hole at one end with a set-screw into which
Fig.3.
different-sized drills can be inserted; some chucks have an extra plug for an extra plug for taking very fine drills. The wood-chuck can be made to act as a drill-chuck, by removing the fork, inserting the stem of a drill instead, and tightening it up with the set-screw (see Fig. 4).
Lathe-carriers are made of steel or iron; the head has a slot into which work must be firmly driven after centering, and tightened up by the set-screw. The stem, when the work is in the lathe, rests
