Selection Of Blades - Hitachi FCJ 55VA Handling Instructions Manual

of 0 to 3,000/min according to the degree that the trigger
switch is depressed. Select the speed appropriate to the
material of the workpiece and/or the working conditions.
To achieve continuous operation, pull the trigger switch
all the way back and depress the stopper. Then, turn the
speed adjustment knob to adjust the blade operating
speed as desired.
NOTE
The speed adjustment knob rotates approximately 3 turns.
To turn the switch OFF, push the trigger switch again to
disengage the stopper, and release the trigger switch.
CUTTING
CAUTION
While sawing, the base must be firmly in contact
with the workpiece surface, and the blade must be
held at a right angle. If the base becomes separated
from the material, it could cause the blade to break.
When cutting while holding the front surface, be
careful of the moving blade and hold the upper part
firmly.
1. Rectilinear cutting
(1) To ensure accurate rectilinear cutting, employ op-
tional accessory guide as shown in Fig.6.
(2) Use the splinter guard to reduce roughness of the
cutting surface of the wooden materials. Attach the
splinter guard by inserting it from the front section
of the base until clicks into place.(Fig.7)
CAUTION
Set the base in the front position when using the
splinter guard.
2. Cutting a circle or a circular arc
To ensure efficient cutting, employ optional acces-
sory guide and nail or wood screw as shown in
Fig.8. When mounting the guide, loosen the base
bottom screw, and shift the base as far forward as
it will go.
3. Sawing curved lines
When sawing a small circular arc, reduce the feed-
ing speed of the machine. If the machine is fed too
Material to be cut
Lumber
Iron plate
Nonferrous metal
Synthetic resin
Pulp
Others
Table 1 List of Appropriate blades
Material quality
General lumber
Plywood
Mild steel plate
Aluminum, copper, brass
Phenol resin, melamin resin, etc.
Vinyl chloride, acryl resin, etc.
Foamed styrol, etc.
Cardboard, corrugated paper
Hardboard
Fiberboard
Hard rubber
Slate
fast, it could cause the blade to break.
4. Cutting metallic materials
Always use an appropriate cutting agent (spindle
oil, soapy water, etc.) When a liquid cutting agent
is not available, apply grease to the back surface
of the material to be cut.
5. Pocket cutting
(1) In lumber:
Aligning the blade direction with the grain of the
wood, cut step by step until a window hole is cut
in the center of the lumber.(Fig.9)
(2) In other materials:
When cutting a window hole in materials other than
number, initially bore a hole with a drill or similar
tool from which to start cutting.
6. Angular cutting
Set the chip cover to the first step.(Fig.5)
To adjust the angle of inclination; loosen the base
bottom screw, shift the base position to the side
groove of the semicircular portion, align the scale
on the base semicircular portion (figures engraved
on the scale indicate the angle of inclination) with
the housing edge line, and thoroughly tighten the
base bottom screw (Fig.10 and 11).
CAUTION
Set the screw to the opposite side of the inclining
side when using the guide.(Fig.12)

SELECTION OF BLADES

1. Accessory blades
To ensure maximum operating efficiency and re-
sults it is very important to select the appropriate
blade best suited to the type and thickness of the
material to be cut. One type of blade is provided
as standard accessory. The blade number is en-
graved in the vicinity of the mounting portion of
each blade. Select appropriate blades by refering
to Table 1.
No.1 or No.31 (thick plate) or No.2 (thin
plate)
No.3 or No.6
No.6
No.6
No.4 (thick plate) or No.6 (thin plate)
No.2 or No.4 (thick plate) or No.6 (thin
plate)
No.2
No.2
No.5 or No.6
No.6
No.2
No.5
English
Blade No.
21