46. Chisels.
—Chisels are usually divided into two classes, the framing chisel, which is heavy and strong, and the firmer chisel, which is lighter. The framing chisel, [Fig. 87], is used on heavy work such as the frames of buildings. Its handle is usually fitted into a socket and the top is tipped with leather or banded with iron to prevent its splitting when pounded with the mallet. The firmer chisel, [Fig. 88], is used for lighter work without the mallet, such as paring, and its handle is usually fitted upon a tang.
Fig. 87.
Fig. 88.
The size of a chisel is indicated by the width of the cutting edge and varies from one-eighth of an inch to two inches.
To do good work a chisel must be kept very sharp, and special care must be taken in handling it. Both hands should, at all times, be kept back of the cutting edge.
Fig. 89.