Diestocks, diecollet, and tap wrenches

Figure 2-12.—Diestocks, diecollet, and tap wrenches. although it is made specifically for open adjusting- type dies. Two-piece collet dies (fig. 2-11) are used with a collet cap (fig. 2- 12) and a collet guide. The die halves are placed in the cap slot and are held in place by the guide that screws into the underside of the cap. The die is adjusted by setscrews at both ends of the internal slot. This type of adjustable die is issued in various sizes to cover the cutting range of American Standard coarse and fine and special form threads. Diestocks to hold the dies come in three different sizes. Two-piece rectangular pipe dies (fig. 2-11) are available to cut American Standard pipe threads. They are held in ordinary or ratchet-type diestocks (fig. 2-13). The jaws of the dies are adjusted by set- screws. An adjustable guide serves to keep the pipe in alinement with respect to the dies. The smooth jaws of the guide are adjusted by a cam plate. A thumbscrew locks the jaws firmly in the desired position. Threading sets are available in many different combinations of taps and dies, together with diestocks, tap wrenches, guides, and necessary screwdrivers and wrenches to loosen and tighten adjusting screws and Figure 2-13.—Adjustable die guide and ratchet diestocks. 2-9