Fig. 2953.
Fig. 2954.
The following example of forging under the hammer is derived from The Engineer, of London, England. [Fig. 2950] shows the piece to be forged. A block of iron, [Fig. 2951], is drawn out as in the figure, the dimensions of a and b being considerably above the finished ones. A forked tool t, [Fig. 2952], may be used to nick the two grooves shown in [Fig. 2953], which marks the locations for the hub and forms a starting guide for the two fullering tools shown in [Fig. 2954], one of which is held by the blacksmith and the other by the helper. After this fullering the forging will appear as in [Fig. 2955]. The ends e, f may then be drawn out, having the shape as in [Fig. 2956]. To shape the curve between the side of the hub and the body of the stem, grooves are formed as in [Figs. 2957] and [2958], y and b being top and bottom half-round fullers, and these two grooves are subsequently made into one by means of larger half-round fullers, as in [Fig. 2959]. The object of making two small fullered grooves and then making them into one is to prevent the fullering from spreading the body of the stem by lessening the strain due to using a large fuller at once. The piece now appears as in [Fig. 2960].
Fig. 2955.