METAL BODY REPAIR - OD1653 - LESSON 2/TASK 1
all types of glass are handled. The wheeltype is best suited for cutting
laminated safety glass. To keep the cutter in good condition when not in
use, immerse it in a mixture of kerosene and oil. This mixture keeps the
cutter clean and allows the wheel to turn freely on its shaft at all times.
When cutting glass, first make sure it is thoroughly cleaned. The glass
surface should first be wiped around the cutting line with kerosene. This
serves as a solvent and cleans the cutting area of grease, oil stains, and
other contaminants. The kerosene will also help eliminate much of the
flaking from the cut.
(5) Hold the cutter between the index and second fingers. This holds
the cutter firmly, and there is no tendency for it to rock back and forth as
pressure is applied. Let the last three fingers of the cutting hand rest on
the glass which is being cut or on the surface of the cutting table. This
will steady the hand and increase accuracy. It is also less tiring.
(6) Make certain that the glass has been warmed before cutting. Glass
is much easier to cut and less likely to break when warm. If glass is taken
from a cold room, place it near a warm stove or warm radiator for 5 to 10
minutes before it is cut. When cutting, do not press hard on the glass.
For best results, exert just enough pressure to make a fine line cut. Too
much pressure causes flaking and may destroy the cut. Chips are often minor
runs, but may become cracks in the glass later on. The glass should be cut
the exact size of the pattern and finished 1/32 of an inch smaller. This
enables the glass to have ample room between the glass runs. Push or pull
the cutter. In following a straight edge or a pattern thick enough to serve
as a guide for the cutter, it is better to pull the cutter. However, when
you must guide the cutter by watching a pattern placed under the glass, you
will find it easier to push the cutter. This enables you to follow the
pattern without having the cutter itself hiding it. In cutting combination
safety glass, it is best to cut the heavy glass first, making certain that
you run it clear through its thickness. Then cut and run the thinner glass.
(7) After making the cut, it must be cracked immediately or the cut will
heal, making the cracking operation difficult if not impossible.
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