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Hitachi DV10DVA Manual

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7
English
at a low speed. When set to “H”, the drill rotates
at a high speed.
CAUTION
⅜ When changing the rotational speed with the shift
knob, confirm that the switch is off.
Changing the speed while the motor is rotating will
damage the gears.
⅜ When setting the shift knob to “H” (high speed) and
the position of the cap is “4” or “5”, it may happen
that the clutch does not engaged and that the motor
is locked. In such a case, please set the shift knob
to “L” (low speed).
⅜ If the motor is locked, immediately turn the power
off. If the motor is locked for a while, the motor
or battery may be burnt.
5. The scope and suggestions for uses
The usable scope for various types of work based
on the mechanical structure of this unit is shown
Table.1.
3. Rotation to Impact changeover (See Fig. 4.).
The "Rotation (Rotation only)" and "Impact (Impact
+ Rotation)" can be switched by aligning the drill
mark "
" or the hammer mark" " to the triangle
mark of the housing.
⅜ To make holes in the metal, wood or plastic, switch
to "Rotation (Rotation only)".
⅜ To make holes in bricks or concrete blocks, switch
to "Impact (Impact + Rotation)".
CAUTION
If an operation which is normally performed at the
"Rotation" setting is performed at "Impact " setting,
the effect of making holes does not only increase
but it may also damage the bit or other parts.
4. Change rotation speed
Operate the shift knob to change the rotational
speed. Move the shift knob in the direction of the
arrow (see Figs. 5 and 6).
When the shift knob is set to “L”, the drill rotates
Work Usable range Suggestions
Drilling
Brick: 10 mm
Use for drilling purpose.
Wood: 18 mm
Steel: 10 mm
Aluminum: 10 mm
Driving
Machine screw: 6 mm
Use the bit and socket matching the
screw diameter.
Nut: 5 mm
Wood screw: 5.1 mm (diameter) x 32 mm (length) Use after drilling a pilot hole.
Table 2
6. How to select tightening power and rotational speed
Table 1
Use Cap Position
Rotating speed selection (Position of the shift knob)
L (Low speed) H (High speed)
Driving
Machine screw 1 – 5
F
or 4 mm or sma
ll
er
di
ameter
screws.
F
or 5 mm or
l
arger
diameter screws.
Wood screw 1 – 5 For 3.5 mm or smaller nominal
diameter screws.
For 3.8 mm or larger
nominal diameter screws.
Drilling
Brick ––––––
F
or
d
r
illi
ng w
i
t
h
a
b
r
i
c
k
working drill.
Wood For 10 mm or larger diameters.
F
or 10 mm or sma
ll
er
diameters.
Metal
F
or
d
r
illi
ng w
i
t
h
an
i
ron
working drill.
––––––
For drilling with a carbide
tipped drill bit.
For drilling with a metal
working drill bit.
CAUTION
⅜ The selection examples shown in Table 2 should
be considered as general standard. As different types
of tightening screws and different materials to be
tightened are used in actual works proper
adjustments are naturally necessary.
7. Mounting and dismounting of the bit.
(1) Mounting the bit
After inserting a driver bit, etc. into the keyless drill
chuck, firmly grasp the ring and tighten the sleeve
by turning it toward the right (in the clockwise
direction as viewed from the front). (See Fig. 7)
⅜ If the sleeve becomes loose during operation, tighten
it further. The tightening force becomes stronger
when the sleeve is tightened.
(2) Dismounting the bit
Firmly grasp the ring and loosen the sleeve by
turning it toward the left (in the counter-clockwise
direction as viewed from the front). (See Fig. 7)
CAUTION:
When it is no longer possible to loosen the sleeve,
use a vise or similar instrument to secure the bit.
Set the clutch mode between 1 and 3 and then turn
the sleeve to the loose side (left side ) while operating
the clutch. It should be easy now to loosen the
sleeve.
8. Confirm that the battery is mounted correctly.
9. Check the rotational direction
The bit rotates klockwise (viewed from the rear side)
by pushing the R-side of the selector button.
The L-side of the selector button is pushed to turn
the bit counterclockwise. (See Fig. 8). (The
and
marks are provided on the body.)
CAUTION:
Always use the impact drill with clockwise rotation,
when using it as an impact drill.
10. Switch operation
When the trigger switch is depressed, the tool rotates.
When the trigger is released, the tool stops.
⅜ THe rotational speed of the drill can be controlled
by varying the amount that the trigger is pulled.
Speed is low when the trigger switch is pulled slightly
and increases as the trigger switch is pulled more.
… 9 …


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