Hitachi DV18DCL - 18V 1.5Ah Lithium Ion Hammer Drill Instruction Manual page 15

2. Tightening torque adjustment
(1) Tightening torque
Tightening torque should correspond in its
intensity to the screw diameter. When too strong
torque is used, the screw head may be broken or
be injured. Be sure to adjust the cap position
according to the screw diameter.
(2) Tightening torque indication
The tightening torque differs depending on the
type of screw and the material being tightened.
The unit indicates the tightening torque with the
numbers "1, 4, 7 ... 22" on the cap, and the black
dots. The tightening toque at position "1" is the
weakest and the torque is strongest at the highest
number.
(3) Adjusting the tightening torque
Rotate the clutch dial and line up the numbers "1,
4, 7 ... 22" on the clutch dial, or the black dots,
with the triangle mark on the outer body. Adjust
the clutch dial in the weak or the strong torque
direction according to the torque you need.
CAUTION:
The motor rotation may be locked to cease while
the unit is used as drill. While operating the
hammer drill take care not to lock the motor.
Too long hammering may cause the screw broken
due to excessive tightening.
3. Rotation to Impact changeover (See Fig. 6)
The "Rotation (Rotation only)" and "Hammer
(Hammer + Rotation)" can be switched by aligning
the drill mark " " or the hammer mark " " with
the triangle mark on the outer body.
To make holes in the metal, wood or plastic, switch
to "Rotation (Rotation only)".
To make holes in bricks or concrete blocks, switch
to "Hammer (Hammer + Rotation)".
CAUTION:
If an operation which is normally performed at the
"Rotation" setting is performed at "Hammer"
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. 8 and 9).
Work
Brick
Wood
Drilling
Steel
Aluminum
Machine screw
Driving
Wood screw
When the shift knob is set to "LOW", the drill
rotates at a low speed. When set to "HIGH", the
drill rotates at a high speed.
CAUTION:
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.
When setting the shift knob to "HIGH" (high
speed) and the position of the clutch dial is
bitween "16" and "22", 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
"LOW" (low speed).
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.
To extend the lifetime, the lithium-ion battery
equips with the protection function to stop the
output. Therefore, if the tool is overloaded, the
motor may stop. However, this is not the trouble
but the result of protection function. In this case,
release the switch of tool and eliminate the causes
of overloading.
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
in Table 4.
Table 4
Use for drilling purpose.
Use the bit or socket matching the screw diameter.
Use after drilling a pilot hole.
Shift knob
Low speed
Fig. 8
Shift knob
Fig. 9
Suggestions
English
High
speed
15