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Adjustthrustbearing (KeyNo.36)atrearofbladeby
loosening setscrew(KeyNo.23).Position t hrust
bearing
.002" away from back of blade. Secure posi-
tion of thrust bearing by tightening set screw.
BLADE
SELECTION
•
Blades vary depending on type of material, size of
workpiece and type of cut that is being performed.
•
Characteristics
which make blades different are
width, thickness and pitch.
BLADE WIDTH
•
Width of blade describes distance from tip of a tooth
to back of blade.
•
Width of blade will affect rigidity of blade. A wider
blade will wander less and produce a straighter cut.
•
Width of blade also limits the smallest radius which
can be cut. A %" wide blade can cut about a ½"
radius.
BLADE THICKNESS
•
Blade thickness describes the distance between
sides of blade. A thicker blade has more rigidity and
stronger teeth.
• A narrow thick blade would be used to cut curves
while a wide thin blade would be used to make long,
straight cuts.
BLADE
PITCH
•
Pitch describes number of teeth per inch or tooth
size. A blade with more teeth per inch will produce a
smoother cut.
•
The type of material being cut determines number of
teeth which should be in contact with work.
•
For soft metals, the proper blade has between 6 to
12 teeth per inch.
•
When cutting hard metals, where shocking is more
detrimental, use a blade with 12 to 24 teeth per inch.
•
For softwoods, the proper blade has 4 to 8 teeth per
inch.
•
For hardwoods, the proper blade has 8 to 12 teeth
per inch.
•
There should always be at least three teeth in con-
tact with cut to avoid shocking blade.
•
Blade shocking occurs when pitch is too large and
blade tooth encounters too much material. This can
strip teeth from blade.
•
Blade manufacturers are prepared to supply informa-
tion about blades for specific applications.
BLADE
SPEED
Refer to Figure 6.
•
The amount of force with which the blade cuts is
determined by speed.
•
High cutting speeds are used on soft materials
where less force is needed and a high rate of materi-
al removal is desired.
•
Low cutting speeds are used on hard materials
when more force is required.
•
To change blade speed, position V-belt in proper
configuration (see Figure 6). Reposition and tension
V-belt as described in the next section.
80 FPM ....................
Steel and Steel Alloys
150 FPM ...................
Cast Iron and Bronze
200 FPM .............
Aluminum, Brass and Copper
80 FPM
150 FPM
Figure
6 - Blade
Speeds
200 FPM
REPOSITIONING
V-BELT (METAL
CUTTING)
Refer to Figures 6, 7 and 11.
•
Blade speed is determined by the position of the
V-belt on the idler and motor pulleys (Figure 11, Key
Nos. 23 and 26). Blade speed is changed by chang-
ing pulley position of V-belt.
•
Be sure to disconnect saw from power and turn saw
OFF before attempting to change blade speed.
•
To change blade speed loosen motor mount plate
(Figure 7, Key No. 9) by loosening knob (Figure 7,
Key No. 14). Position V-belt on motor and idler pul-
leys as required. See Figure 6, Blade Speeds, for
recommended
pulley and belt settings.
•
Tension V-belt by pushing down on motor mount
plate and tightening knob. Belt is properly tensioned
when light pressure applied to midpoint of the belt
produces about ½" deflection. Do not over tighten
V-belt.
CHANGING
THE SAW OPERATION
FROM
METAL TO WOOD
CUTTING
Refer to Figures 2, 7, 8 and 11.
•
Remove metal cutting blade. See "Removing Blade"
above.
•
Remove shroud (Figure 11, Key No. 28).
•
Loosen knob (Figure 7, Key No. 14). Remove V-belt
from motor and idler pulleys (Figure 11, Key Nos. 23
and 26).
•
Place V-belt on motor and drive pulleys (Figure 8,
Key Nos. 46 and 50).
•
Tension V-belt by pushing down on motor mount
plate and tightening knob. Belt is properly tensioned
when light pressure applied to midpoint of the belt
produces about 'tZ' deflection.
•
Change clutch handle from "metal" to "wood". (Refer
to Figure 2)
•
Replace shroud.
8
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