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Hitachi VB 16Y Handling Instructions Manual page 45

Portable rebar cutter/bender
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HOW TO USE (BENDING)
WARNING!
Note that the unit is not a hand-held tool. Be absolutely
sure to use the unit only after placing it on a stable
spots such as floor, ground, etc.
Never bring your hand close to the bending roller
during operation.
Never bend any materials other than the rebars. If you
attempt to do so, the material can splinter into pieces
and scatter.
Bend less than every 3 pieces of rebar with a 10 mm
diameter, less than every 2 pieces with a 12 mm
diameter, and every 1 piece with a 16mm diameter.
Remember that the cutter moves even during the
bending operation, thereby, close the cutter cover
without fail.
Begin operation only after marking sure that there are
no people within the turning range of the material to
be bent.
Dial indication
Condition of rebar
In bending the rebar of 10mm, 12mm, and 16mm
diameters, a difference takes place in the bending
angle even in the same dial position depending upon
the difference of rebar's thickness. Slightly change a
position of the setting dial depending upon the rebar's
diameter even with the same bending angle as
illustrated in the top diagram on the left column. (Fig.
11)
Size of rebar
ø10 mm
ø12 mm
ø16 mm
NOTE
Even at the same dial setting position, the bending
angle can sometimes differ if the diameter or hardness
of the rebar is different. Use the angle marks merely
as a rough guideline.
2. Ordinary bending.
(1) Set the unit in the position with the turntable up as
shown in Fig. 12.
(2) Make sure that the cover is closed.
(3) Set the setting dial at the desired angle.
(4) Place the rebar on the stopper of the center plate and
set it correctly as shown in Fig. 9.
(5) Pull the switch trigger and bent the rebar.
45°
45°
90°
Colors of indicated marks
White
Red
Yellow
Reserve an extra length of at least 200 mm on the
bending length of the rebar to be bent. (Fig. 9)
If the extra length is not long enough, the rebar can
come off during bending operation, or it can break
into fragments and scatter dangerously.
Place the rebar on the center plate and set it so that it
is horizontal with the turntable surface.
If the side that is to be bent is set inclined upward, the
rebar can come loose from the bending roller while
bending causing it to fly off. (Fig. 10)
When bending multiple rebars at one time, some may
come off the bending roller and guide, etc., and
therefore exercise caution and set them horizontally.
If you bend the rebar with a large angle while placing
your hand onto it, there is a fear of getting your hand
caught in by the fold-back reaction of the rebar. Never
place your hand onto the position where the rebar
may fold back.
1. Setting bending angles by setting dial.
The bar can be bent according to the angles indicated
on the setting dial, as shown in Fig. 16.
90°
135°
135°
Fig. 16
(6) Continue pulling the switch trigger untill the motor
makes reverse rotation and the bending roller starts
to return. (Once the bending roller starts to return, it
will automatically return all the way to the home
position even if the switch trigger is released.)
3. Bending by eye measurement.
By pulling the switching trigger little by little, you can
bend the rebar to your desired angle by eye
measurement in addition to the dial setting.
(1) Set the setting dial to a larger angle than you desire.
(2) Pull the switch trigger lightly and bend the rebar
slowly.
(3) When the rebar is bent to the desired angle, stop
pulling the switch. If the bar is still small of the desired
angle, pull the switch again.
(4) Remove the rebar after bending has been finished.
Then, pull the switch once more and return the
bending roller to the home position. (Continue pulling
the switch until the bending roller begins reverse
rotation.)
4. Removing rebar during bending operation
When bending out at a low speed in "bending by eye
measurement", the rebar can sometimes get caught
in the bending roller due to its own flexure.
If this occurs, you can return the bending roller to the
home position by pulling the switch again after setting
the setting dial to the "return" position. This is the
same method used to remove the rebar when it gets
caught during cutting operation. (Fig. 13)
English
180°
180°
44

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