USING A HAND TAP
TM 9-243
DIES - Continued
ROUND SPLIT ADJUSTABLE DIE
The round split adjustable die (1), or button die, may be
adjusted through the screws on the holder. Adjustment
on the open type is done by turning the three screws on
the holder. One expands the die while the other two
compress the die. Adjustment of the screw type (2) is
done by turning a fine-pitch screw that either forces the
die jaws apart or allows them to spring together. The
round split adjustable dies are used to cut American
Standard Coarse and Fine Threads. A die holder or
handle is needed for proper operation of round split
adjustable dies.
The following procedures may also be followed when
using a taper tap or a bottoming hand tap.
1.
Clamp a steel plate (1) securely in a vise (2).
Drill and ream a hole of desired size.
THREAD CUTTER SET
The thread cutter set is made up of a combination of
taps, dies, diestocks, tap wrenches, guides, and
screwdrivers and wrenches for making adjustments.
Thread cutter sets are used for cutting internal and
external threads.
2.
Select tap (3) and secure in tap wrench (4).
3.
Apply cutting oil to the tap and the hole.
38-4
