Fig. 74.—Steps in Making Heavy Flat Tongs.
Forge the other end in the same manner, exerting due care to have all dimensions correspond; cut the stock in two at the center. Draw out the heavy ends for the handles with the power hammer or with some assistance from a sledge. They should be roughly forged at first with an allowance for finishing as follows: Beginning at the joint, use the top and bottom swages on the outer edges through the greatest width, and swage to 5⁄8 × 1⁄2 inch. This swaging should be continued toward the end to form the handle. By using the flatter during the swaging, the sides may be kept straight, smooth, and slightly tapering to a round section. Make the end 3⁄8 inch in diameter for a length of 3 inches. Sketch F shows one side of a pair of tongs drawn and swaged.
Place the parts together to see if they fit properly; if they do not, make the necessary alterations. Use a top fuller to form a groove e about 1⁄8 inch deep, lengthwise on the inside of the jaws, and smooth the sides and edges with a flatter. Then punch a 3⁄8-inch hole in the center of the joint, as shown in sketch F. This should be done on both parts.
Heat thoroughly the end of a 3⁄8-inch rivet, 13⁄4 inches long, and with it rivet the two portions tightly together. Heat the tongs, make them work freely, and adjust them to hold 3⁄8-inch flat iron, with the entire length of the jaws in contact and with the ends of the handles 1 inch apart. The jaws and handles should be adjusted so that a line extended lengthwise across the center of the rivet would pass midway between them.
93. Light Chain Tongs.—[Fig. 75]. Forging, swaging, punching, fullering, and riveting. Material: 13 inches of 3⁄4-inch square mild steel.
Fig. 75.—Steps in Making Light Chain Tongs.