1/2 | 3/4 | 14 | 10.500
3/4 | 3/4 | 14 | 10.500
1 | 15/16 | 11-1/2 | 10.800
1-1/4 | 1 | 11-1/2 | 11.500
1-1/2 | 1 | 11-1/2 | 11.500
2 | 1-1/8 | 11-1/2 | 12.930
--------+----------------+-------------------+----------------

To acquaint the beginner with iron pipe work, the following
exercise is given. In it there are a great many of the actual
problems that come up when the pipe is put in on a job. This is the
last exercise that is required in this book. The sketch shows
clearly just what the job is and below I have gone over each
operation that is necessary to complete the job.

[Illustration: FIG. 67.]

MATERIALS NECESSARY.--Six feet of 1-inch black pipe; four 1-inch
black ells; two 1-inch tee; one 1-inch right and left coupling;
oil.

TOOLS NECESSARY.--Two 14-inch pipe wrenches, vise, pipe cutters,
stock and 1-inch follower right and left die and reamer.

The vise is made secure on a bench or post, care being taken before
it is put in place to provide room enough to swing the stocks. A
length of 1-inch pipe is put into the vise and the vise clamped
around it. The end of the pipe that is to be threaded should stick
out through the vise about 9 inches. If there is a thread on this
end, the dies should be run over it to make sure that it is a
standard thread and to clean the threads. Before proceeding further
with this exercise the dies and stocks will be described and their
use shown.

DIES.--A full set of dies is taken. The full set of stocks and dies
is composed of right and left dies from 1/8 inch up to 1 inch, with
a guide for each size, also a small wrench with which to turn the
set screws. The dies come in sets, two in a set. These are the
Armstrong patent that I am describing. Take the stock and the
handles, and a set of 1-inch right dies with the guides out of the
box. The dies will have marked on them 1" R (if 1-inch left were
wanted, the mark would be 1" L). The set screws are taken out of
the stock and the dies inserted in their proper place. There is a
deep mark on the edge of each die and under it a letter S. This
letter means "standard." This mark on the die is set even with a
similar mark on the stock and when the set screws are in place and
tightened, a standard thread w