The planes shown in Figs. 36-39 are those most used in ordinary woodwork. Of these, the jack-plane alone will suffice for grammar grade work, its iron being ground straight across then whetted very slightly rounding. Where a full set of planes is available, the jack-plane is used for taking off rather large quantities, the blade being still more rounding than for manual training purposes.

Fig. 36. Jack Plane

Fig. 36. Jack Plane.

Fig. 37. Smooth Plane

Fig. 37. Smooth Plane.

Fig. 38. Jointer

Fig. 38. Jointer.

The smooth-plane, Fig. 37, is also sometimes used in elementary manual training work. Its short length makes it less suited for planing edges of 15" and over. It is used by carpenters for smoothing, the blade being ground and whetted straight across with the corners slightly rounded.

The jointer, Fig. 38, is used mainly for planing edges of long boards, etc. The blade is ground and whetted straight across. The extra length keeps the blade from cutting the hollows until the high spots have been removed.

The block-plane, Fig. 39, is of especial advantage where a vise is not available for holding the stock, and one hand must be used to hold the stock while the other holds the plane. It differs from the other planes in that it has no cap-iron and in having the bevel of the plane-iron placed up instead of down. The mouth of this plane is adjustable, a small lever at the front of the plane being used for this purpose.

Fig. 39. Block Plane

Fig. 39. Block Plane.