USE ONLY IDENTICAL REPLACEMENT PARTS TO REPAIR THIS MACHINE.
SAVE THESE INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS
DIAMOND GLASS GRINDER
FOR PERSONAL SAFETY
THIS MACHINE MUST BE PROPERLY GROUNDED
The power cord of this machine
is equipped with a three-prong (grounding) wall receptacle to minimize
the possibility of electric shock hazard. Where a standard two-prong
wall receptacle is encountered, it is the personal responsibility and
obligation of the customer to have it replaced with a properly grounded
three-prong wall receptacle. DO NOT, UNDER ANY CIRCUMSTANCES, CUT
OR REMOVE THE THIRD (GROUNDING) PRONG FROM THE POWER CORD.
UNPLUG YOUR MACHINE:
A. Before making any repairs - (Note: We strongly recommend that any
servicing be performed by a qualified person.)
B. Before cleaning.
OUTSIDE USA (818) 341-0301 · INSIDE
USA (800) 423-5635
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FAX (818) 998-2078 · WEBSITE www.glastar.com
When operating the
grinder, always protect yourself against eye injuries from flying
glass. Either wear safety glasses or use the eye shield that
mounts over the grinder's cutting head. The eye shield is preferable
to glasses because it eliminates glass chips flying toward the
- First remove the work surface by pulling it straight up.
Then, install the pump stanchion (2) by plugging it into the
housing next to the grinding head. Make certain that it is
pushed all the way down.
- Next, you'll need the brass alignment collar. Install the
collar on the end of the motor shaft (3). If the collar is
touching the pump stanchion, the stanchion has not been pushed
down far enough.
- Them, screw the 1/4" grinding head (4) into the end of the
motor shaft (through the alignment collar). Use the white nifty
tool to tighten the head.
- Replace the work surface.
- Install the rubber splash guard on the peg directly behind
the pump stanchion.
- Add water. It takes a minimum of 16 ounces to start the pump
working. Another 16 ounces (one pint) can be added before the
housing overflows. If you keep the reservoir full all the time,
you will find that the heads spray a good deal more water than
if the level is kept lower.
- Turn the grinder on, and you're ready to grind.
- If, for some reason, you do not want to use the pump, the
pump stanchion can be unplugged and the sponge inserted in
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When you start to grind, push the glass against the grinding
head with firm, even pressure. The diamond surface cuts better and
lasts longer with heavy pressure against it. Excessive pressure will
not harm the diamond cutting head or slow the motor.
Some manufacturers suggest the use of an industrial coolant
to protect the diamond head. Glastar does not recommend or discourage
the application of a coolant. Coolants may prolong the life of the
Glastar diamond head by 10 percent, but their costs far outweigh the
money saved. In addition, coolants create a mess.
If your finger touches the diamond cutting head when
it is rotating, it will feel smooth. The diamond surface is not nearly
the hazard to fingers as is a belt sander or a silicone carbide grinding
As you grind, the water level lowers because of the spray.
If it falls too low, the pump will stop pumping. Therefore, check both
fountains (5 & 6) frequently to be certain that water is geting
to the grinding surfaces. It is possible for the lower fountain (6)
to plug up. If this happens, remove the stanchion and clean it out.
The pump automatically keeps the grinding surfaces of
both heads flooded with water. This means that the heads will grind
much faster and the life of the grinding surface will be increased
The grinding head slings water as it rotates. The rubber
splash guard catches most of this water, and it returns to the reservoir.
Some of the water is thrown toward the operator, so an apron would
be helpful. Although the spray is a nuisance, this increased water
supply is a distinct advantage.
The diamond cutting
surface of the head is 5/8" high. Glastar has installed the head so that
the full 5/8" of diamond extends above the working table. If all the
glass you grind is 1/8" thick or less, you will only use the lower one-fifth
of the cutting surface. When the diamond cutting surface dulls, lower
the head 1/8". This will provide a new, sharp grinding surface. When
that area dulls, lower the head another 1/8" and so forth. This will
allow five surfaces; each surface should last approximately 25 to 75
hours, a total of 125 to 375 hours of grinding from one head. If you
grind 1/4" thick glass, you lower the head 1/4" to change to a new, fresh
surface. This gives you two grinding surfaces per head.
It is difficult to quote a specific number of hours that
the diamond cutting head will last. Like sandpaper, it does not wear
out all of a sudden. Instead, the cutting head gradually begins to
dull. The head's durability depends on the type of glass you are grinding
and your definition of dull. The 25 to 75 hours per surface is an estimate.
Some claim more than 100 hours per surface, while others change to
a fresh surface after 10 hours. Of course you should expect far less
life if you are grinding rocks.
Never grind any metals (i.e. lead, copper) with the diamond
head. This will make the diamond surface unusable for glass in a matter
To lower the diamond cutting head, loosen the set screw
near the top of the head with the Allen key. The loosened head will
slide up and down on the motor shaft with ease. Each time you re-position
the cutting head, Glastar recommends the application of a lubricant
such as Vaseline, to both the motor shaft and the cutting head. When
re-tightening the set screw with the allen key, make certain the head
is set against the flat side of the motor shaft.
To remove the 1" head, unscrew the 1/4" head and remove
the brass alignment collar and unplug the pump stanchion. The small
1/4" grinding head can be used to grind holes in glass. Hold your piece
of glass at approximately a 45° angle to the work surface and work
your way through.
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The grinder's only moving part is the electric motor
and no mainteneance is required. After using the grinder for a short
period, you will find that a very fine white paste, made up of glass
particles, collects at the bottom of the reservoir. The glass may also
collect in the pump. Therefore, after two or three hours of use, remove
the pump stanchion and rinse it out well. Also, wipe out the reservoir.
TIPS FOR USING YOUR GRINDER
Despite the grid-type of work surface, some finely-ground
glass may stick to the top plate, and it can scratch smooth, soft glass,
such as 3/16" or 1/4" plate, and some antique glasses. If you are working
with soft glass, it would be wise to place several strips of masking
tape on the bottom of the glass to raise it off the table.
If you use
a paper pattern when grinding the glass, water from the cutting head
will get it quite wet. If you intend to make two projects from one
set of patterns, let the paper dry out before attempting to grind
the second set. After the paper dries, it will resemble its original
shape and size. However, the paper patterns do shrink after getting
wet several times.
if you are working on a Worden lamp, where the same set of patterns
is used six times, Glastar recommends making a second set of patterns.
Use each one only three times. Better yet, make original patterns
from a sheet of acetate or mylar. Unaffected by water, these sheets
can be used over and over again.
This machine operates
on standard household current (115 volts, 60 cycles, single phase,
ac). The power consumption is 1.5 amps at full load.
This machine operates
on standard household current (220/240 volts, 50/60 hz, single
phase, ac). The power consumption is 1.5 amps at full load.
NO FAULT WARRANTY
WHAT WE WILL DO
This warranty is extended by GLASTAR CORPORATION to the original purchaser
and to any succeeding owner. If your GLASTAR GRINDER fails for any reason
within the first 5 years from the date of manufacture, we will repair
the product without charge for parts or labor.
If you have any problem with your GLASTAR GRINDER call the GLASTAR
TOLL FREE NUMBER for an authorization number. Then pack the machine
well and return it post-paid to GLASTAR. We will repair your grinder
as rapidly as possible and return it to you post-paid.
This warranty does not cover wear of the diamond grinding surface.
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