Hitachi DV 14V, Handling Instructions Manual

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19
English
APPLICATIONS
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By combined actions of ROTATION and IMPACT:
Boring holes in hard surfaces (concrete, marble,
granite, tiles, etc.)
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By ROTATIONAL action:
Boring holes in metal, wood and plastic. Tightening
machine screws, wood screws.
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized con-
forms to the power requirements specified on the
product nameplate.
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, inviting serious
accident.
3. Extension cord
When the work area is removed from the power
source. Use an extension cord of sufficient thick-
ness and rated capacity. The extension cord should
be kept as short as practicable.
4. Fitting the drill bit or the driver bit
Fit the drill bit or driver bit into the chuck and
use the chuck wrench to secure it, tightening the
chuck using each of the three holes in turn.
5. Selecting the appropriate drill bit
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When boring concrete or stone
Use the drill bits specified in the Optional Acces-
sories.
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When boring metal or plastic
Use an ordinary metalworking drill bit.
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When boring wood
Use an ordinary woodworking drill bit.
However, when drilling 6.5 mm or smaller holes,
use a metalworking drill bit.
6. Selecting the driver bit
Screw heads or bits will be damaged unless a bit
appropriate for the screw diameter is employed
to drive in the screws.
7. Confirm the direction of bit rotation (Fig. 1)
The bit rotates clockwise (viewed from the rear
side) by pushing the R-side of the reversing switch
lever.
The L-side of the lever is pushed to turn the bit
counterclockwise.
CAUTION
Never change the direction of bit rotation while
operating. Turn the power switch OFF before
changing the direction of bit rotation: otherwise,
burning of the motor will result.
Always use the impact screw drill with clockwise
rotation, when using it as an impact drill.
8. Fixing the side handle
Loosen the knob bolt on the side handle, and
attach the side handle to the gear cover in a
position convenient for drilling. Match the project-
ing part of the handle to the groove on the gear
cover, and firmly tighten the knob bolt. To remove
the side handle, loosen the knob bolt and rotate
the handle.
To attach a depth gauge on the side handle, insert
the gauge into the U-shaped groove on the side
handle, adjust the position of the depth gauge in
accordance with the desired depth of the hole,
and firmly tighten the knob bolt.
9. IMPACT to ROTATION changeover (Fig. 2)
The Impact Screw Drill can be switched from
IMPACT (impact plus rotation) to ROTATION (ro-
tation only) by sliding the change plate. When
boring concrete, stone, tile or similar hard mate-
rials, sliding the change plate to IMPACT side. The
drill head impacts against the material while
continuing to rotate.
When boring metal, wood or plastic or tightening
the screw, sliding the change plate to ROTATION
side. The drill rotates as an ordinary electric drill.
CAUTION
䡬
Do not use the Impact Screw Drill in the IMPACT
function if the material can be bored by rotation
only. Such action will not only reduce drill effi-
ciency, but may also damage the drill tip.
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The change plate may not slide smoothly when
changing from impact drill mode to drill mode
(
Fig. 2 -
3
).
In this case, switch ON and operate the machine
for few seconds.
The spindle shaft will then be pushed forward,
and the change plate can be moved smoothly.
10. High-speed/Low-speed changeover
To change speed, rotate the gear shift dial as
indicated by the arrow in
Fig. 3 . The numeral “1”
engraved on the drill body denotes low speed, the
numeral “2” denotes high speed.
PRACTICAL HANDLING PROCEDURES
1. Speed adjustment and switch operation
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The drill speed can be adjusted from 0 through full
speed by regulating the trigger-squeezing force.
The more the trigger is squeezed, the faster the drill
rotates. When the trigger is squeezed fully, the
speed is the maximum.
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Pulling the trigger switch and pushing the stopper,
it keeps the switched-on condition which is conve-
nient for continuous running. When switching off,
the stopper can be disconnected by pulling the
trigger again.
2. When using as a Drill or an Impact Drill
(1) Pressing force of the drill
You cannot drill holes more quickly even if you
press the drill with a stronger force than necessary.
It not only damages tip of drill bits and decreases
the efficiency of operation, but also shortens the
life of the drill.
(2) In case of penetrating holes
Drill bits can be broken when the material being
drilled is penetrated. It is important to decrease
pressing force just before penetrating.
CAUTION
In continuous operation, conduct no-load operation
for five seconds after completing a drilling job.
(3) When a thick drill bit is used
Your arm is subjected to larger reaction force when
a thicker drill bit is used. Be careful not to be moved
by the reaction force. For this, establish a foothold,
hold the unit tightly with both hands perpendicu-
larly to the material being drilled.
3. When driving machine screws
When the trigger switch is pressed, the motor starts.
The drill rotates by attaching the bit to the groove
of screw head, and by pushing the head together
with the driver main body, it tightens the screw.