Manual

FPH-2-H
Positive Stop Punch Holder
The Corbin Positive Stop Punch Holder is used to stall the
Hydro-press ram against the die face, bringing the ram to a
positive stop, and using the PRESSURE REVERSE controls to
stop, hold, and
reverse the ram
travel. Punches
are dropped into
the holder from
the top, by first
removing the
threaded rod.
The depth of
punch insertion
into the die is
controlled by the
position of the
threaded rod.
The punch can
slide back until it contacts the end of the rod, at which point
pressure can be applied to the bullet, if the die face has not yet
contacted the punch holder face. There is a groove machined in
the threaded rod, which indicates the maximum safe adjustment
of the rod. Do not operate with this groove exposed, as it means
that too few threads remain to hold the rod into the punch
holder. The groove must be hidden within the body when
pressure is applied, to avoid stripping threads.
Groove for
maximum
safe adjust-
ment.
The FPH-2-H Positive Stop
Punch Holder consists of
four main parts. These are
(1) the body (large threaded
cylinder at left), (2) the rod
(hardened, threaded
plunger with one smooth
end and a groove machined
around the threads, right
side of the picture), (3) the
rod locking ring, which fits
around the rod and is held
by a neoprene friction
washer on the bottom side of the ring, against the top of the
body, and (4) the main lock nut, which is not shown but fits
around the body and holds it from turning in the press head.
In order to use the punch holder, turn off the position switch and
turn on the pressure switch on the CHP-1 Hydro-press. You can
use the holding in a Hydraulic Mega-Mite press also, by simply
stalling the ram against the face of the punch, then pressing the
down button. Set the maximum pressure just slightly above the
minimum required to do the job you need done, but in no case
should the pressure exceed the die breaking pressure for your
given size of die, as listed in the tables of the book Power
Swaging.
Set the pressure reversing knob so that the ram will reverse just
below the pressure setting on the drive pressure knob. Then, put
the punch into the holder from the top, screw in the rod, and
push the punch up by hand to find the point at which the punch
will be stopped and held by the rod. Make sure the groove in the
threaded rod is not visible above the top of the body! Make a
test swage, and adjust the position of the body to stop the ram
and cause it to reverse. Adjust the rod so that the punch is held
the correct distance into the die to do the job you need done.
Note that the punch will "float" and ride up into the body until it
contacts the rod. The rod has a magnetic punch pickup to help
you load and remove the punch. The copper ring and magnetic
material can be seen in the end of the rod.
CORBIN Mfg. & Supply, Inc. PO Box 2659 White City, OR 97503
Magnetic
punch pickup
Copper flux
concentrator