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Automatic Gem Drill
MODEL # 600 The Automatic Gem Drill uses an electronic feed which mechanically
raises and lowers the drill chuck 1/4". The light pressure of the feed
prevents damage to diamond coated drill bits, but results in a much longer
drilling time. Drill Tubes and 180 Boron Carbide Grit are a low cost
alternative to diamond drill bits for this unit. Plastic Putty holds the work
piece. The putty can also serve as a dam to hold grit around a drill tube. This
unit comes complete with 1/4" Jacobs chuck, two (2) 1-1/2mm and two (2)
2mm diamond drill bits, plastic putty, instructions, and product guarantee. Shipping Weight: 9 lbs. Price: $240.00 Does not come in 220v 50Hz. However,
if you do have a
means to convert, invert, or transform the electricity from 240v 50Hz to 110v 60Hz electrical current
via transformer or other device, you can use this machine. OPERATING INSTRUCTIONS FOR MODEL # 600
AUTOMATIC GEM DRILL INTRODUCTION The model #600 drill is
designed to drill medium to soft gemstone material. The drilling action is
automatic and does not have to be manually controlled. The electronic field of
the motor raises and lowers the chuck automatically 1/4 inch. The light
downward pressure of the feed prevents damage to diamond coated drill bits, but
it does result in longer drilling time. DESCRIPTION 1/50 HP, 115V, 60 Hz
motor turns the drill bit at 3040 rpm. Unit comes with 1/4" Jacob chuck,
1-1/2 and 2 mm drill tubes, cleaner, plastic putty, grit ring (ferrule), and
guarantee. Size: 6"L X 4"W X 13"H. Shipping weight approximately
10 lbs. INSTALLATION Safety: Before plugging
your drill into your electric supply, read the Covington Safety Demand Sheet.
Your drill can be used portable. However, it is recommended that it be secured
to a work bench during drilling. ADJUST DRILL TABLE The electronic field of
the motor raises and lowers the chuck automatically 1/4". Before setting
the height table, run and stop the drill so that the chuck is in the retracted
(high) position. Set the table on the vertical upright shaft with ample space
above the table for the gemstone. It will later be necessary to make a final
adjustment in the table height so that the stone to be drilled is just under
the drill bit tip. When starting again, the bit will automatically drill to a
depth of 1/4". If a hole deeper than 1/4" is desired, the above
procedure is repeated and the table raised. USE OF DIAMOND COATED DRILL BITS Select the bit size you
want and insert one half its shank length into the chuck and tighten securely.
The stone and drill bit must be kept cool. The best way to do this is to
immerse the bit tip in water. Small Stones: Secure the stone to the drilling
table with molding clay under and around the sides of the stone. If not in a
pan, form a dam around the drilling area and fill with water. A drilling jig is
recommended for drilling beads. Again, the tip of the bit should be covered
with water. Diamond drill bits tend to chip the underside of the stone as they
come through. This can be prevented by cementing the stone to a piece of glass
if the bottom is flat. USE OF DRILL TUBES First run the wire
cleaner through the proper size drill tube to see that it is clean. Then
install the tube with about 5/8" extending out of the chuck. Tighten chuck
so that the tube won=t be hammered back (upwards) while drilling. Next, place the little
grit ring (ferrule) over the center of where you want the hole in the stone.
Press the molding clay around the ring so that it will stay in place and not
leak water. Press two small pieces of molding clay on the back side of the
stone, one on each side of where the drill tube will come through (to elevate
the stone when in place on the drill table). Align the ring with the drill tube
and press stone in place on the table. USE OF DRILL TUBES CONTINUED: Fill the ring reservoir
with water and then add #602 boron carbide grit. An eyedropper and flat
toothpick are useful when adding water and grit. Don=t use too much grit or it
will plug the drill tube. Raise the table so that the stone to be drilled is
just under the drill tube. The stone is now in position to be drilled
automatically. DRILLING Using tubes and grit,
the drill will penetrate 1/32" to 1/8" in 15 minutes, depending on
the hardness of the material. Larger sized drill tubes or diamond core drills
cut faster. When drilling action
slows, it usually indicates that the tube is plugged up with core material or
grit. In this event, stop the drill, drop the table down and then remove and
examine the drill tube. Clean the tube with the cleaning pin and reinstall in
the chuck. The drill will not operate satisfactorily if the tube is plugged up. MAINTENANCE Keep the upright shaft
well oiled. Oil the motor bearings located on each end of the motor with 1 drop
of 3-in-1 oil every six months. Caution: Do not over oil bearings. Lubricate the gears with
grease each month. A multi-purpose white grease is a good type to use. WARNING: The motor has a
normal working temperature that is too hot to touch. If the motor should
stop, just give the drill chuck a turn to the right to restart it. Caution: Keep grit away
from the chuck, gears, and bearings. Manual Gem Drill
MODEL # 605 The Manual Gem Drill is
a versatile, light duty machine that drills quickly and accurately. This unit
is powered by a 1/15hp, 5000rpm variable speed motor. The drill comes complete
with a 1/4" Jacobs chuck and key, water pan, instructions, and product
guarantee. Features: Motor: 110V, 60Hz Price: $240.00 Does not come in 220v 50Hz. However,
if you do have a
means to convert, invert, or transform the electricity from 240v 50Hz to 110v 60Hz electrical current
via transformer or other device, you can use this machine. OPERATING INSTRUCTIONS FOR MODEL #605
DRILL INTRODUCTION The model #605 drill is
a multi-speed unit that can be used for drilling, carving and buffing with appropriate
accessories. It is designed for clean, fast and accurate drilling on medium to soft
gemstone material. DESCRIPTION Unit has a 1/15 HP,
115V, 60Hz, 5,000 RPM motor with foot operated speed control. Drill lever gives user a
3/4" stroke. Bracket and motor can be
quickly adjusted for height or removed and mounted horizontally to convert
unit into a buffer and carver. INSTALLATION Safety: Before plugging
your drill unit into your electrical supply, read the Covington Safety Demand
Sheet. It is recommended that
it be secured to a work bench for drilling and it MUST be secured before using
as a carver or a polisher. PREPARATION Select the drill bit
size you want and insert one half of its shank length into the chuck and
tighten securely. The stone and drill bit
must be kept cool. The best way to do this is to immerse the stone in a pan of
water. The stone can be held by
hand, but for absolute steadiness, some type of holding device should secure
both the gem and pan. Small Stones: Secure the
stone to the drilling table
with molding clay under and around the sides of the stone. If not in a pan, form a dam
around the drilling area and fill with water. A drilling jig is recommended for
drilling beads. Again, the tip of the
bit should be covered with water. A clamp can be used to
hold the gem and pan. Diamond drill bits tend to chip the underside of the
stone as they come through. This can
be prevented by cementing the stone to a piece of glass if the bottom is flat. DRILLING Turn on the drill and
place your foot on the rheostat. To start, run the drill at low speed. Gently
lower the drill bit until it contacts the
gem. Apply very little pressure until the bit has cut into the surface of the
stone. This is especially important if
you are drilling a curved surface. After the hole is started, you can increase
the pressure. The speed can also be
increased with the rheostat. At short intervals, raise the bit slightly so that
fresh water can flow into the cut. Until
you learn how to use a diamond drill, be very careful with pressure. Reduce the
pressure considerably when the hole is almost through. Gem Drill Accessories
The Nugget and Bead Vise
is designed to hold beads up to 3/4" in diameter for drilling. Always
drill with the vise submerged in water to keep the drill bit cool and to
sustain a longer drill bit life. This unit comes with a 3" diameter x
5/8" deep aluminum tank. The Putty Vise is
designed to hold small pieces of gemstone or glass for drilling. Always drill
with the work piece submerged in water to keep the drill bit cool and to
sustain a longer drill bit life. This unit comes with a 3" diameter x
5/8" deep aluminum tank, a 1" square block of plastic putty and a
1/4" brass ferrule. The plastic putty holds the work piece and the brass
ferrule can act as a dam to hold grit or water when drilling. Drill Tubes are
available in two sizes. Order # Description Weight Price NBV618 Nugget and Bead Vise 1 lb. $37.00 PPV627 PuttyVise 1 lb. $17.50 BCG602 1 oz Boron Carbide Grit 1 lb. $5.25 CPP604 1/4 lb. Plastic Putty 1 lb. $2.00 RDT601 Metric Drill Tubes 1 lb. $14.75 RDT603 Drill Tubes 1 lb. $14.75 |
