122. The fuller ([Fig. 109]) is made with a handle like that of the checking tool, but the portion used for fullering is made circular in section and about 4 inches long. An assortment of sizes should be provided, with diameters of 1, 11⁄2, and 2 inches. When smaller sizes are needed, a bar of round steel may be conveniently substituted. These tools may be properly termed top fullers, because they are generally held on top of the metal and the blows are delivered from above, thus forming depressions on one side only. Sometimes double depressions are required directly opposite to each other. In such cases a short piece of round metal, the same size as the fuller, is placed on the die directly under the top fuller, with the metal between the two.
If the depressions are to be only semicircular, a short piece of half-round material may be provided which is not liable to be dislocated or jarred out of position on the die.
Fig. 110.—The Spring Fullers.
123. The combined spring fullers ([Fig. 110]) are very convenient for making double depressions. They are similar to the single fuller, but are flattened out at a and b, so that they may be opened for various sizes of stock.
Fig. 111.—The Combination Fuller and Set.
124. The combination fuller and set ([Fig. 111]) may be made with a straight, round handle, but a twisted one is more desirable, because the tool is frequently used in different positions. It should be made of a quality of steel that will withstand severe hammering without becoming battered. The heavy end which forms the tool is made about 11⁄2 by 21⁄2 inches; the corners on one side are left sharp and square, while those opposite are made quarter-round. One side of this tool may be made almost semicircular if it is intended to be used as a fuller. The length may be about 4 inches.
Fig. 112.—Drawing and Finishing with the Combination Fuller and Set.