cutting head descent valve to lower the blade very
slowly onto the work piece. This will protect the
blade at the start of the cut when only a few teeth
are engaged. As soon as the cut has progressed far
enough that several teeth are engaged, the valve
may be opened about l/4 turn. This will allow the
cutting head to descend at its sawing rate, and
opening the valve further will not speed the cutting
action.
If the work piece to be cut is thin wall tubing or any
other thin section (so that only a few teeth will be in
contact with the work piece at any time), a light
cutting force should be used, and the cutting head
descent valve should be opened only enough to
allow a slow, even feed through the cut. A thin
section does not present enough area to the saw
blade for normal cutting forces to be used.
Figure 10
Therefore, the cutting head would fall through the
work too rapidly, causing overfeeding and blade
failure. This situation is prevented by slowing the
maximum rate of descent.
G. COOLANT. If your machine is equipped with a
coolant system, it is wired so that the coolant pump
will run whenever the blade motor is turned on.
CAUTION: Do not run the coolant pump any
length of time unless it is submerged in coolant. If
you wish to run the machine without coolant in the
tank, unplug the coolant pump.
For most sawing applications, a weak soluble oil
and water mixture is used for coolant. If the coolant
becomes too thick or oily, it will result in too much
lubrication and poor blade life. Most materials can
be cut satisfactorily without coolant, but blade life
will be somewhat less and the time per cut will be
Figure 11
somewhat longer because the blade speed must be
reduced to prevent overheating. It may be desirable
to cut some items dry due to their size, shape or
other physical characteristics, or to eliminate other
possible problems which may arise when using
coolant. The only materials on which we do not
recommend using coolant are the "D" series of air
and oil hardening tool steels, cast iron, and brass or
H. ANGLE CUTTING. To make cuts of various
angles from 90 to 45 degrees, loosen the two bolts
holding the stationary vise jaw to the saw bed. Use
a protractor to position the vise jaw on the bed to
the desired angle. As the angle becomes more
acute, it may be necessary to remove the bolt from
Machine set up for 45 cuts.
the slot in the vise jaw (Fig. 10). This bolt may then
be placed in either of the other holes in order to
4. MAINTENANCE
obtain the desired angle. Tighten the bolts securely
Any machine tool will require periodic maintenance
when the angle is set. Next, loosen the two bolts on
including lubrication, minor adjustments, and
the movable vise jaw (Fig. 11), slide it snugly up
eventual replacement of some parts. A good
against the adjusted stationary jaw, and retighten
maintenance program will insure a smooth running
the bolts. Be sure to check the guide arms before
machine. For normal maintenance we recommend
making a cut to be sure they are as close as
practical, but with the necessary clearance.
the following:
23