USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
range of American Standard Coarse and Fine and special
form
threads.
Diestocks to hold collets are issued in three sizes.
(c) Two Piece Rectangular Pipe Dies.
Two piece rectangular pipe
dies are available to cut American Standard Pipe threads. They are held in
an ordinary or ratchet type diestock. The jaws of the dies are adjusted by
means of setscrews.
An adjustable guide serves to keep the pipe in
alignment with respect to the dies.
The smooth jaws of the guide are
adjusted by means of a cam plate; a thumbscrew locks the jaws firmly in the
desired position (figure 131 on the following page).
Nonratchet type
diestock and plain guides are also available for pipe threading (figure 132
on the following page).
FIGURE 130.
DIESTOCKS, DIE, COLLET, AND TAP WRENCHES.
d. Threading Sets.
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 bolts. Figure 132 illustrates typical threading sets
for pipe, bolts, and screws.
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