Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 116

The most simple, and the most generally trustworthy, method of fastening a hammerhead on a shaft is by means of a hard wood or metal wedge driven into a slit in the handle after the head has been put on (see the sectional view, Fig. 325). If a hammer head gets loose after wedging, it can be permanently tightened by driving in a few short, stout nails beside the wedge. The reason is that a nail will force its way into the handle, which may be sufficiently dense to resist the hardest wedge. Soaking in water is another common method of tightening the head. There are many ways of wedging the heads of hammers in place, all more or less satisfactory, but for wooden wedges one of the best methods is to bore with a bradawl two sloping holes (Fig. 326), as at A and B (Fig. 327), through the outer end of the handle and the wedge, after the latter has been driven tightly into the handle. Then drive into each a strong wire nail, and file it off close. Even if the wooden handle or the wedge itself shrinks somewhat, it is almost impossible for the latter to work loose and fall out, and so allow the hammer-head or other similar tool to fly off while being used. Another method is to make with a sharp chisel two or more cuts on each side of a red hot iron wedge (see Fig. 328), so as to raise the surface into something like teeth on a very coarse single-cut file; then drive in the wedge as tightly as possible. Another method is as follows:—Having fitted the hammer-head upon the handle to the line A B (Fig. 329), take the head off again. Bore a hole at c c through the shaft about 3/8 in. above the line A B, and groove each side of the shaft from the hole to the top. Put a piece of steel wire through the hole, and turn it up in the grooves, letting it project as at D D (Fig. 329). Put on the hammer-head down to the line A B. Drive in a wedge w (Fig. 330), fold the wire to lap over the wedge from each side; this prevents the wedge from coming out. The head may work itself loose a little in time; if so, steep it in water a few minutes, and it will be firm again. It is doubtful if this method holds as well as the nailed wedge.

Fig. 325.—Wedged-on Hammer Head.

Figs. 326 and 327.—Fastening on Hammer Head with Nailed Wedge.

Fig. 328.—Iron Wedge.

Fig. 329.—Fastening on Hammer Head with Wired Wedge.