Sometimes you may find it necessary to use screws in places where the heads will show. In such cases first make, when possible, a neat round or square hole with bit or chisel of sufficient diameter to admit the head of the screw and deep enough to allow a shallow plug to be inserted after the screw has been set (see Holes, To Stop). The hardest part in finished work is to make the patch match the rest of the work.
See also Gluing, Clamps, and whatever other operations may be required.
Ripping-Saw.—See Saw.
Rivets.—In heading rivets hold another hammer or piece of metal, or have someone else do so, against the head of the rivet while upsetting the other end.
Rounding Sticks.—It is often required to round sticks for poles, masts, spars, arrows, and a great many other purposes. First plane the piece until it is as nearly square, in section, as you can make it. Then use the form shown on page 95, which will hold the squared stick firmly while you plane off the corners, making it eight-sided. Be careful not to plane the corners off too much, for the eight sides of the stick should be as nearly alike as possible. Next, if the stick is large enough, plane off each of the eight corners so that it will be sixteen-sided. This is about as far as you can go in this way, unless the stick is very large. Set the plane quite fine for taking off these corners or you may plane off too much before you know it. The rest of the rounding you must do with light, fine strokes, testing by eye and by passing your hand over the work (for you can judge a great deal by the sense of touch). The rasp and file can often be used to good advantage. The spoke-shave is good for the final smoothing, followed by the scraper or glass (both of which can be curved) and sandpaper. The latter can be used crosswise as well as lengthwise. Cut it in strips and pull it back and forth around the stick, much as bootblacks put the final polish on shoes with a strip of cloth (Fig. 648).
Fig. 648.
To hold large sticks for this final shaping and smoothing you can put them in the vise, but if there are several, and large, it is better to contrive some way to hold them after the fashion of the centres of a lathe. For one centre, drive a nail or screw through a block or stick of wood and screw the block in the vise (Fig. 649). Make the other centre in the same way and fasten it at such a distance from the first centre that the stick will just fit in between the two. Just how to fasten this second centre will depend on the length of the stick to be rounded and the arrangements of your shop, but you can easily contrive some way to hold it. The stick held between these centres will be clear of everything and can be turned around without trouble. The middle can be supported, if necessary, by a piece of board or a strip lightly nailed to the bench-top.
Masts and spars should be "natural sticks," if possible, and the final shaping and smoothing will be all they will require, for which some such apparatus as that just described will save time and trouble.
