Fig. 18. The Bench Hook
Fig. 19. The Turning Saw
7. The Turning Saw. In ordinary work the saw is supposed to cut to a straight line, but there are certain classes of work where it is desirable to follow a curved line, and consequently a special tool is necessary. The turning saw shown in the cut is used for this purpose. The handles holding the saw blade may be turned in any direction with reference to the frame.
8. The Plane. The plane reduces our rough lumber to planed, or dressed, stock. The cutting part is a thin, wide chisel called the plane iron.
Fig. 20. The Plane Iron in Action
[Fig. 20] shows the position of the plane iron in operation. Assume the iron to be moving in the direction of the arrow on a piece of wood. The sharp point would enter the board and, should the grain be unfavorable, start a splitting action, as shown at a.
We wish to smooth the wood instead of roughing it, and must in some way stop the splitting. This is accomplished by placing a cap iron on the plane iron, as shown at b. The cap bends and breaks the shaving before the splitting action has a chance to begin, and gives the spiral form so familiar in wood shavings.