Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 80

A chisel edge is the same shape as the edge of a plane iron, and is produced in the same way, and there is no need to treat chisels separately here. Information, however, on keeping gouges in order may be welcome. They seldom require grinding, but this, when necessary, must be done with great care, as the bevel must follow the curve of the tool to ensure good work, Fig. 205 shows the gouge applied to the stone; it must be constantly turned backwards and forwards, as shown by the arrows. Fig. 206 illustrates the manner of holding the tool whilst grinding. The same rule as regards turning the gouge applies when sharpening it upon the oilstone; this is shown by the arrows at a (Fig. 207); if it were held like a chisel, as b, a good result would never be obtained—that is, the sweep of the tool would not be correct, as shown at c. After rubbing upon the flat stone, it may be necessary for some purposes to sharpen the gouge from the inside. This is done by means of an oilstone slip. The tool is held in the left hand, b, as in Fig. 208, and the slip, held in the right hand, is rubbed up and down the gouge, taking care to keep the slip pressed quite flat against the groove, so as not to turn the edge. The reason for having the gouge edge so sharpened for ordinary use is evident from the following explanation of the use of a gouge sharpened the reverse way; that is, with the bevel inside the groove. Fig. 209 shows two pieces of wood fitted or scribed together. Figs. 210 and 211 are the piece marked (A) removed, the more plainly to illustrate the application of the gouge. At Fig. 212 is seen a scribing gouge b, showing by a section that it is ground on the inside, thus enabling it to cut straight down, as a; this is impossible with the ordinary gouge ground upon the outside, as Fig. 213 plainly shows.

Fig. 210.—Scribed Piece of Wood.

Fig. 211.—Scribed Piece of Wood.

Fig. 212.—Gouge ground Inside.

Fig. 213.—Gouge ground Outside.