Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 89

For holding a saw during the process of sharpening a saw vice will be required. This is made in various forms, one of which is shown by Figs. 267 and 268. It can be made of any hard wood, such as oak or mahogany. It consists of two parts, hinged together at the bottom a; an iron screw working in a plate or nut is placed in the centre b for the purpose of tightening up the jaws d between which the saw is placed. The piece cut out at c is to allow the back of a, tenon saw to pass through. The jaws d should be about 12 in. by 2 1/2 in. by 1 1/2 in., and the sides S 15 in. by 6 in. by 1 1/2 in. These sides are fixed to the jaws by means of two small tenons, as shown by dotted lines, being glued to keep them in position. Fig. 269 shows a handy and cheap vice, which can be fixed to any support by means of a screw-bolt and fly-nut passing through it. The movable jaw is acted upon by a similar bolt and fly-nut. Figs. 270 and 271 show an improved saw vice, differing from ordinary vices only in the method of tightening up the jaws; Figs. 272 and 273 show plan and elevation of eccentric clamp with rod and nuts. The rod is of 1/4-in. round iron, screwed at each end (mild steel would be more suitable), the bends being made when the iron is heated red hot. This clamp must be shaped out, and the protuberant part where it will tighten on the stock should be smooth and true. Two 5/16-in. holes, which will be 6 1/2 in. down, are bored through both uprights to accommodate the ends of the rod, and collars may be let in flush at the back to tighten the nuts against. When the nuts are adjusted, a saw is instantly clamped by pressing the handle down as shown in Figs. 270 and 271. To release the saw, pull up the handle of the eccentric clamp or lever. The position of the rod hole is as shown in the illustrations. It will add to the grip of the jaws to make the uprights slightly curved outwards in the middle, and a 2 1/2-in. butt hinge will complete the vice. A strip of vulcanised rubber or leather fastened along the top inside edge of jaws will improve the grip.

Figs. 267 and 268.—Saw Vice.

Fig. 269.—Saw Vice.

Figs. 270 and 271.—Improved Saw Vice.

Figs. 272 and 273.—Clamp of Improved Vice.

Fig. 274.—Saw Bench.