Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 180

For starting the screw, a hole should be bored through the top piece sufficiently large to allow the screw to pass freely, as A (Fig. 475). This may be done with a gimlet, the top of the hole being enlarged with a gouge to receive the head of the screw, so that it may be a trifle below the surface. This is shown at B B (Fig. 475). The two pieces of wood should now be placed together, and a bradawl inserted in the bottom piece (as G), to help the screw in its course. Drive home the screw as follows: Take the screwdriver in the right hand, and guide its end into the cut on the head of the screw with the left hand. The handle should now be turned from left to right (or “clockwise”), using both hands in the process, until the screw is driven as tightly down as possible. The method of holding the screwdriver is shown by Fig. 476, this, however, not showing the left hand, though this invariably must be employed. The practice of putting screws in the mouth just before using them is bad; it causes the screws to rust and to be difficult to withdraw. Before inserting screws in woodwork, dip their points in grease. This assists both insertion and withdrawal, and keeps the screws free from rust. A small box to hold grease is a useful adjunct of the bench.