Hitachi DV 14DBL Handling Instructions Manual page 33

(3) When using this unit as an impact drill, align the clutch
dial hammer mark " " with the triangle mark on the
outer body.
CAUTION
The clutch dial cannot be set between the
○
numerals "1, 3, 5 ... 22" or the dots.
Do not use with the clutch dial numeral between
○
"22" and the line at the middle of the drill mark.
Doing so may cause damage (See Fig. 6).
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 clutch
dial position according to the screw diameter.
(2) Tightening torque indication
The tightening torque diff ers depending on the type of screw and the material being
tightened.
The unit indicates the tightening torque with the numbers "1, 3, 5 ... 22" on the clutch dial,
and a dots. The tightening torque at position "1" is the weakest and the torque is strongest
at the highest number (See Fig. 5).
(3) Adjusting the tightening torque
Rotate the clutch dial and line up the numbers "1, 3, 5 ... 22" on the clutch dial, or the 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 driver 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. 5)
The "Rotation (Rotation only)" and "Impact (Impact + Rotation)" can be switched by aligning
the drill mark "
To make holes in the metal, wood or plastic, switch to "Rotation (Rotation only)".
○
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 eff ect of making holes does not only increase but it may
also damage the bit or other parts.
" or the hammer mark " " with the triangle mark on the outer body.
Drill mark
Line
33
English
Hammer
mark
Triangle mark
Fig. 6