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Hitachi CR 13 VA Manual

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English
(4) Pull the holder sleeve back slightly in the direction
of the arrow mark shown in Fig. 5 (in the direction
opposite to the arrow marked on the holder sleeve).
When you do this, the spring force will return the
holder sleeve to the correct position automatically.
There is no need to fasten the holder sleeve at this
time. (Fig. 5)
(5) Pull the back of the saw blade two or three times
by hand and check that the blade is securely
mounted. When pulling the blade, you will know
it is properly mounted if it clicks and the holder
sleeve moves slightly. (Fig. 6)
CAUTION
When pulling the saw blade, be absolutely sure to
pull it from the back. Pulling other parts of the blade
will result in an injury.
6. Dismounting the blade
(1) Turn on and off the switching trigger several times
so that the holder sleeve can jump out of the front
cover completely. Thereafter, turn off the switch
and unplug the power cord. (Fig. 1)
CAUTION
Be absolutely sure to keep the switch turned off
and the power cord unplugged to prevent any
accident.
(2) After you have turned the holder sleeve in the
direction of the arrow mark shown in
Fig. 2 and secured it, turn the blade so it faces
downward. The blade should fall out by itself. If
the blade doesn’t fall out, pull it out by hand.
CAUTION
Never touch the saw blade immediately after use.
The metal is hot and can easily burn your skin.
WHEN THE BLADE IS BROKEN
Even when the saw blade is broken and remains
inside the small slit of the plunger, it should fall
out if you turn the holder sleeve in the direction
of the arrow mark, secure the holder sleeve, and
face the blade downward. If it doesn’t fall out itself,
take it out using the procedures explained below.
(1) If a part of the broken saw blade is sticking out
of the small slit of the plunger, pull out the protruding
part and take the blade out.
(2) If the broken saw blade is hidden inside the small
slit, hook the broken blade using a tip of another
saw blade and take it out. (Fig. 7)
MAINTENANCE AND INSPECTION OF SAW BLADE
MOUNT
(1) After use, blow away sawdust, earth, sand, moisture,
etc., with air or brush them away with a brush, etc.,
to ensure that the blade mount can function
smoothly.
(2) Periodically lubricate the saw blade mount with
machine oil through the small slit at a state where
the holder sleeve is turned in the direction of the
arrow mark shown in Fig. 2. (Fig. 8)
NOTE:
⅜ If the saw blade mount is used without proper
cleaning and lubrication, the rotation of the holder
sleeve may be hampered by sawdust and particles
of dust, disabling you to remove the saw blade with
your fingers.
In such a case, hold the periphery of the holder
sleeve lightly using a pair of pliers and the like, and
turn the holder sleeve to left and right little by little.
After the saw blade has been successfully removed,
be absolutely sure to clean it up with air, etc., carry
out proper lubrication, and then check and see if
the saw blade mount can function smoothly.
7. Adjusting the base
This unit employs a mechanism that can adjust the
base mounting position in three stages without the
use of a wrench or other tools.
(1) Press a pushbutton. When you do this, a base lever
will jump out to prepare the base for adjustment.
(Fig. 9)
(2) Push up the base tip and jog the base back and
forth. (Fig. 10)
(3) You can adjust the base position in three stages.
Move the base at an interval of about 15 mm, find
the position where the base hooks, and press in
the base lever with your fingers. The base is secured
when you hear the clicking sound. (Fig. 11)
8. Adjusting the blade reciprocating speed
This unit has a built-in electronic control circuit that
makes it possible to adjust the variable speed of
the saw blade either both by pulling a switching
trigger or turning a dial. (Fig. 12)
(1) If you pull the trigger further in, the speed of the
blade accelerates. Begin cutting at a low speed to
ensure the accuracy of your target cut position.
Once you’ve obtained a sufficient cutting depth,
increase the cutting speed.
(2) On the dial scale, “5” is the maximum speed and
“1” the minimum. The high speed is generally
suitable for soft materials such as wood, and the
low speed is suitable for hard materials such as
metal. We recommend that you use the following
as a rough guide in selecting the suitable speed
for the materials you are cutting.
CAUTION
⅜ When cutting at low speed (scale of 1 – 2), never
cut a wooden board more than 10 mm thick or a
mild steel plate more than 2 mm thick. The load
on the motor can result in overheating and damage.
⅜ Although this unit employs a powerful motor,
prolonged use at a low speed will increase the load
unduly and may lead to overheating. Properly adjust
the saw blade to allow steady, smooth cutting
operation, avoiding any unreasonable use such as
sudden stops during cutting operation.
Example of materials Recommended
to be cut dial scale
Mild steel pipes /
cast-iron tubes / 2 – 4
L-shaped angle steel
Wood / wood with nails
driven in
5
Stainless steel 1 – 3
Aluminum / brass / copper 2 – 4
Plaster board 4 – 5
Plastic / fiber board 1 – 3
… 8 …


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