Corbin Buller Polisher Kit BPK 1 Instructions Manual

							Bullet Polisher Kit
               BPK-1
The Corbin BPK-1 Bullet Polisher Kit consists of  a thermally-protected
115 volt 60Hz vibrator motor with built-in power cord and switch, a mount-
ing bracket which circles the motor housing and secures the motor to the
bottom of  a gallon pail or a large coffee can, a pound of  walnut shell
grinding media, and four self-locking nuts and matching bolts and wash-
ers (to fasten the bracket to the bottom of  the container).
The motor should be mounted under the container, and the container
should then be hung by a bail or handle from a shelf  bracket or a light rope
tied to an overhead beam or hook (lamp swag hooks are often convenient
for this purpose). Success has also been reported with the use of  a door
spring as part of  the hanging system, so that the bucket or can is free to bounce up and down with the vibration,
increasing the action. It has also been found that the position of  the motor, relative to the diameter and and height
of  the container, makes a very large difference in the “boiling” action of  the particles within the container. If  the
walnut shell media does not move rapidly with a kind of  boiling action, tr y plugging the holes with 1/4-inch
diameter short bolts, and move the mounting bracket so it is slightly off  center on the bottom of  the container.
Once you have mounted the motor and bracket to the bottom of  a can (on the outside, of  course), and hung the
can by a bail or handle (which you can make easily by punching two holes near the top of  the container through
which the ends of  a coat hanger can be bent), you can then place one or two pounds of  walnut shell polishing
media into the can, and turn it on. As you add cases, bullets, or other metal objects to polish, watch the action of
the walnut shells.  Sometimes the action slows down rapidly with increased load, and then increases again as the
mass of  the entire assembly reaches a point that makes it vibrate in harmonic relationship with the motor. If  you
find this to be the case, you can adjust the amount of  walnut shell media or the load of  parts to be polished so that
you always get maximum movement of  the material.
Caution: Although the motor is thermally protected, it will run hot. Make sure it is located far enough away from walls,
furniture or any flammable materials so that if  it should fail, there would be no harm to anything but the motor
itself  from excess heating. Also, make sure that the power cord is not pulled taut: it should have a loop near the
motor to allow the motor to vibrate without being loaded and slowed by having to pull on the power cord. Vibra-
tion of  the power cord can break the wiring inside, and cause the motor to stop, if  the cord is pulled straight from
the motor to the wall outlet. Make sure the motor can get an unobstructed flow of  air to keep it within the normal
operating temperature range (don’t build a closed cabinet for the polisher, for example). Spacing the motor at least
six inches from walls and table tops is recommended. Do not let the motor run unattended for long periods of  time
(for example, overnight). Do not use f lammable liquids in the walnut mixture.
Generally speaking, brass and bullets can be polished within 20 to 40 minutes. To increase the amount of  polishing
action, you can add a few drops of  Corbin Bore Cleaner to the walnut shells and stir them well, breaking up any
clumps of  particles sticking together. This can restore polishing action to well-used walnut shells. Lead tip bullets
can become damaged by leaving them for too long a time in the polisher, although the action is more gentle than
the typical tumbler-type polishing barrel. Small particles of  walnut shell can go into the holes in open tip bullets or
hollow points. To prevent this, you can seal the tips with a drop of  candle wax or press them into a parafin block to
pick up a small “plug” in the tip. The wax does no harm if  left in the bullet.
Corbin Manufacturing & Supply, Inc.
PO Box 2659
White City, OR 97503 USA
www.corbins.com