USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
(b) Inspect the dies to see that they are sharp and free from
nicks.
(c) Assemble two piece
rectangular
pipe
die
on
adjustable
die
guide and ratchet diestock.
(d) Set the die to the desired size.
(e) Apply cutting oil to cutting edges of die and to the pipe to
prevent overheating of dies and marring of the cut threads.
(f) Place diestock on the pipe and push lightly with the heel of
your hand until the die is up against the end of the pipe. Adjust guide to
admit pipe by loosening thumbscrew; rotate cam plate until guide fits pipe;
tighten thumbscrew after adjustment.
(g) Rotate the diestock clockwise a few short strokes to start the
cut.
Lock ratchet and pump handle up and down several strokes.
(h) Recoil die.
(i) Reverse ratchet and stroke frequently to free die of chips.
(j) Thread the pipe until threaded end of the pipe projects 1/4 to
1/2 inch from diestock.
(k) After threading, set ratchet for reverse operation and back
off die.
(l) Check for proper length of threaded pipe. For determining the
length of threaded pipe for standard fittings and couplings for various size
pipe, refer to Table IT on the following page.
h. Care of Taps and Dies.
(1) Maintenance. Do not attempt to sharpen taps or dies. Sharpening
of taps and dies involves several high precision cutting processes where the
thread characteristics, chamfer angle and, in some cases, the hook angle and
spiral point are involved. These cutting procedures must be accomplished by
experienced personnel in order to maintain the accuracy and the cutting
effectiveness of taps and dies.
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