Corbin PCM-1 Power Cannelure Machine Instructions Manual

							PCM-1
Power Cannelure
Machine
Cannelure 100 bullets/minute
Weight: aprox. 70-lbs.
Power: 110-120 volts 60 Hz.
Motor: 1/4-HP Gear drive.
Forced air cooling: 100 CFM.
Rust resistant, baked-in powder-
coated grey finish on both the
steel frame and the heavy gauge
steel cover.
Built-in 5-amp circuit breaker and
switch with bright pilot lamp, for se-
cure continuous heavy duty operation in
a production line or on the bullet-maker’s
bench.
Massive thrust bearing adsorbs the powerful forces that roll precision
cannelure rings (serration grooves) into copper, aluminum, lead, gilding
metal, brass, or even mild steel bullet jackets. A set of precision spacer
disks provides cannelure height settings that cannot vibrate out of ad-
justment. The PCM-1 comes with a set of spacers, Allen wrenches to
adjust the depth and lock the back plate into position for the bullet diam-
eter, a universal 224 to 475 caliber back plate for cannelure rolling (op-
tional knurling back plate is available), and one diameter of cannelure
rolling wheel (PCM-W) which covers a certain range of calibers (see chart)
within the back plate adjustment range. Custom wheels can be made to
order for multiple grooves, special widths and angles. Simply feed bullets
in one side of the channel, and they come out the other side evenly
cannelured.
Special back
plates also
required for
these larger
calibers.
The PCM-1 uses one of six standard diameter PCM-W cannelure wheels
to fit the range of calibers from .224 to .510-inches. The wheels have a
key that slips over the vertical shaft on top of the tool. A rotating plate
carries the bullets around, while spacers fit between the plate and the
wheel to position the cannelure vertically on the bullet. The spacers are
.027 and .048 inches thick, making it possible to stack them in various
combinations to achieve any practical position for the cannelure ring. One
PCM-W wheel is included in the price of the tool. To select the proper size
wheel for a given caliber of bullet, refer to the chart. Wheels are stamped
with an identification letter from A to F, which specifies the range of cali-
bers as shown:
Caliber Code Wheel Diam., Inches
.224 to .257 A 2.100
.258 to .308 B 2.014
.309 to .358 C 1.900
.359 to .412 D 1.815
.413 to .458 E 1.710
.459 to .512 F 1.615
.512 to .600 G 1.515
.600 to .690 H 1.415
.690 to .800 I 1.315
.800 to .900 J 1.215
.900 to 1.00 K 1.115
Standard cannelure width is .050-inches with
a vertical serration. The raised por tion of
the wheel, which impresses the can-
nelure, is of fset from the center of  the
wheel, so you can turn the wheel over
providing different cannelure posi-
tions, in addition to the spacers.
Wheels are held in place by a collar,
which is clamped to the shaft by a
single set-screw, which MUST be
clamped against the flat of  the
shaft, never on the round surface
or the keyway slot. Rubber feet
under the case provide for air flow
out the bottom of the case: do
not remove them.
May be shipped by UPS (70-lb).   
						

							The PCM-1 rolls precise cannelure in bullets, and other straight-sided
cylinders, made of copper, brass, aluminum or mild steel tubing with
walls up to .050-inches thick. It is not recommended for rolling cannelure
in solid rod, and is not warrantied for such use. Solid copper, brass,
aluminum or steel bullets, or other designs having the same resistance
to compression, may cause damage to the main thrust bearing or motor,
or produce accelerated wear.
Bullets are fed into the left-hand side of the rotating disk, and caught and
rotated into and through the channel between the back plate and the
wheel, and emerge from the opposite side of the channel. The width of
the channel is set by a small movement of the back plate. It can be made
to rotate about the left-side mounting bolt in a precise manner, by loos-
ening the right-side mounting bolt slightly and adjusting a set-screw in
the front of the back plate. The set-screw bears against a pin and move
the plate precisely to adjust for the correct bullet diameter and depth of
cannelure desired.
A spring-loaded gate device on the left-hand side of the back plate is
provided to assist you in aligning long bullets, so they are not knocked
over when feeding into the channel. Push the gate closed (compressing
the spring) and push a bullet against it, in position to be taken into the
channel. Gently release the spring pressure and the bullet will be taken
vertically into the channel.
A number of automatic feeder designs have been built by Corbin clients
to feed their PCM-1 tools, such as vibratory bowl and drop tube feeders.
These are limited to specific lengths, weights, shapes or calibers, and
often cost many times what the PCM-1 does. Even
by hand feeding the tool, it is possible to
achieve up to 100 pieces per minute:
mounting the tool at a slight angle so
the bullets tend to slide toward the
channel, yet not fall over, is one
simple method of rapid feeding. More
than one bullet can go through the
channel at once, provided that the
bullets do not touch each other and
interfere with rotation.
To quickly set the channel width,
place an un-cannelured bullet at the
output side of the channel, so it acts
as a gauge between the back plate
and the wheel. Set the back plate so
the bullet just fits. Then adjust to the
desired cannelure depth from this position.Note: if a bullet tends to stick, skid without turning, or is deeply marked on
one side and lightly on the other, it usually is caused by trying to adjust
the tool so the back plate is too close to the wheel, or by using a wheel
that is at the very edge of its range for the depth being attempted. Using
the next size of wheel may be the solution, or simply using less depth. It is
common for bullet makers to believe that a .040 or deeper cannelure is
necessary, when in fact as little as .010 inch depth provides sufficient
crimp space with far less deformation of the bullet. Custom designs with
too much area under the combination of grooves, or with insufficient ser-
rations on the wheel (or no serrations) may or may not turn the bullet.
Some adjustment to a custom design may be required in order to get
better results.