Prior To Operation; Adjusting The Saw Prior To Use; How To Use - Hitachi C 6DD Handling Instructions Manual

Cordless circular saw
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If the battery is reinserted within 3 seconds, the
battery may not be properly charged.


1. Setting up and checking the work environment
Check if the work environment is suitable by
following the precautions.
2. Prepare a wooden workbench (Fig. 11)
Since the saw blade will extend beyond the lower
surface of the lumber, place the lumber on a
workbench when cutting. If a square block is utilized
as a workbench, select level ground to ensure it
is properly stabilized. An unstable workbench will
result in hazardous operation.
To avoid possible accident, always ensure that the
portion of lumber remaining after cutting is securely
anchored or held in position.


Pull out battery before doing any adjusting.
1. Adjusting the cutting depth
As shown in Fig. 12, hold the handle with one hand
while loosening the knob with the other.
The cutting depth can be adjusted by moving the
base to the desired position. In such manner adjust
the cutting depth and then securely retighten the
2. Adjusting the riving knife
Loosen the hexagonal – head bolt used to clamp
the riving knife, adjust the riving knife to the position
shown in Fig. 13 and securely retighten the bolt.
3. Adjusting the angle of inclination
As shown in Fig. 14 (A), Fig. 14 (B) by loosening
the knob on the incline gauge and the wing-bolt
on the base, the saw blade may be inclined to a
maximum angle of 45° in relation to the base. After
having completed the adjustment, reconfirm that
the knob and the wing bolt are firmly tightened.
Values of the inclined gauge provided on the base
merely serve as a rough guideline. For cutting
operation at an inclined posture, use the circular
saw after adjusting the angle between the base and
the saw blade with a protractor, etc.
4. Adjusting the guide piece
On the circular saw, it is possible to make fine
adjustment of the fixing position of the guide piece,
where the saw blade and the premarked line are
to be aligned.
When the saw is shipped from the factory, the
linear portion of a front scale on the guide piece
is aligned with the central position of the saw blade.
(Fig. 15)
Loosen the fixed screw on the guide piece, should
the fixing position be wrong, and make necessary
adjustment of the position.
For cutting operation at the inclination of 45 degrees,
make adjustment so that the notch on the guide
piece and the premarked line become aligned.
5. Regulating the guide (Fig. 16)
The cutting position can be regulated by moving
the guide to the left or right after loosening its
wingbolt. The guide may be mounted on either the
right or left side of the tool.


1. Operation of switch (Fig. 17)
(switch trigger and light switch)
(1) For safe operation of the machine, a "switch lock"
is provided on the side of a handle.
If the "switch trigger" is pulled in a state where
"switch lock" is pressed in the direction of the
arrow mark, the main switch can be turned ON.
And the "switch lock" is used as the "light switch".
If the "switch lock (light switch)" is pressed in a
state, the light is turned ON.
(2) After the switch is turned ON, even when you
release your hand from the switch lock, the body
continues running and the light continues being
turned ON as long as you keep on pulling the
switch trigger.
(3) If you release the switch trigger, you can turn OFF
the switch and the "switch lock" returns to the
original position automatically and the light turns
OFF too.
Do not fix and secure the switch lock. Besides, keep
your finger off the switch trigger when the circular
saw is being carried around. Otherwise, the main
body switch can be inadvertently turned ON,
resulting in unexpected accidents.
Keep the light ON during cutting operation only.
If it is lit ON in other cases, the main body switch
can be inadvertently turned ON, resulting in
unexpected accidents.
If the main body is left as it is with the battery
inserted, there can be a case where the [switch lock]
touches the floor and/or wall surface and lights up
continuously, depending on the direction of the
body. Be careful, since continuous lighting can easily
make a full-charged battery go dead in about 3
2. Cutting procedures
Recheck that the saw blade is securely clamped.
Confirm that the knob for adjusting the slot depth,
the knob and the wing bolt for adjusting the angle
of inclination.
(1) Place the base on the material, then align the
premarked line and the sawblade with the guide
piece front scale section at the front of the base.
(Fig. 15)
When the base is not slanted, use the large cutout
as the guide. (Fig. 15, Fig. 18(A))
If the base is slanted (45 degrees), use the small
front scale as the guide. (Fig. 15, Fig. 18(B))
(2) Ensure that the switch is turned to the ON position
before the saw blade comes in contact with the
lumber. The switch is turned ON when the trigger
is squeezed; and OFF when the trigger is released.
Moving the saw straight at a constant speed will
produce optimum cutting.


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