Figure 1-55.—Types of adjustable dies.

with a socket, box, open-end, or any wrench that will fit. Rethreading dies are available in sets of 6, 10, 14, and 28 assorted sizes in a case. Round split adjustable dies (fig. 1-55) are called "Burton" dies and can be used in either hand diestocks or machine holders. The adjustment in the screw adjusting type is made by a fine-pitch screw, which forces the sides of the die apart or allows them to spring together. The adjustment in the open adjusting type is made by means of three screws in the holder, one for expanding and two for compressing the dies. Two piece collet dies (fig. 1-55) are used with a collet cap (fig. 1-56) and collet guide. The die halves are placed in the cap slot and are held in place by the 1-35 TWO-PIECE RECTANGULAR PIPE DIE INCHES 1 2 ADJUSTING SCREW TWO-PIECE COLLET DIE SCREW ADJUSTING TYPE OPEN ADJUSTING TYPE ABEf0141 Figure 1-55.—Types of adjustable dies. STRAIGHT HANDLED TAP WRENCH T-HANDLE TAP WRENCH COLLET DIESTOCK COLLET CAP COLLET GUIDE INCHES THREE SCREW DIESTOCK SINGLE SCREW DIESTOCK ABEf0142 Figure 1-56.—Diestocks, diecollet, and tap wrenches.