log is cool. This will cause the metal to shrink and
which the log rests when they are taking on a
stiffen.
large log because it helps in turning the log.
12-7. Another factor that will affect the operation of
Some operators use powdered graphite on the
the saw is an improper angle on the front of the tooth.
head block slides instead of oil.
This will us the saw to run "in" or "out." Remember, the
cutting edge of the saw should be straight across.
and wash them out with solvent and repack them
12-8. Speed. Usually, the speed of a portable sawmill
with pressure gun grease once a year.
is the greatest that can be maintained both in and out of
13-3. Saw. In handling the saw, always observe the
the cut. A usual mistake of operators is to try to operate
following rules:
the saw at too great a speed. A regular uniform speed
a. Don't ever saw with a "hot" saw.
both in and out of the cut insures more lumber and more
b. Never saw with dull teeth.
accurate lumber. The speed should be governed by the
c. Don't allow chips to rub the saw.
available horsepower, of course, and must be increased as
d. Keep the saw clean of pitch. (NOTE: Pitch
the power to drive the saw is increased.
sticks only to a hot saw.)
13-4. Carriage. When checking the carriage, proceed
as follows:
13. Basic Rules In Sawmill Operation
a. Be sure that the carriage is level.
b. Always check the carriage before you start
13-1. There are many basic rules that are important in
sawmill operation. These rules apply to greasing the saw,
sawing by running it up and down the track two or three
handling the saw, and checking the carriage.
time to determine whether the ropes are in order and the
13-2. Greasing. While greasing the sawmill, do as
saw is in the clear.
c. Always check the dogs when you are not sawing,
follows:
especially on the "return" after the last board is cut from
conveyor twice daily b. Use soft, light pressure
the log. Keep the dogs away from the saw.
d. Always keep the saw guides adjusted properly.
gun grease.
c. Use only pressure gun grease in grease gun.
e. Always lock the carriage when you complete the
d. Lubricate the knee slides and gear rack slides
day's work or whenever the machine is not in operation.
f. Always put in the carriage bolt and lockpin and
and other moving parts frequently with light
machine oil. Some sawmill operators make a
set the hand brake when you are going to move the mill.
practice of lubricating the surface of the knees on
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